The expected completion time of a project is 40 weeks and the standard deviation of its critical path activities is 5. Provide one example of each. Determine if the variable is qualitative or quantitative. We measure their math phobia after selecting gr, The effects of different levels of qualitative independent variables are described using variables. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Is the amount of time it takes to assemble a simple puzzle a quantitative or qualitative variable? A single qualitative variable B. A. Nominal B. Ordinal C. Quantitative. From the course view you can easily see what topics have what and the progress you've made on them. Learn what discrete, continuous, and categorical variables are. Why or why not? For the variable described below, indicate whether it is a quantitative or a categorical (qualitative) variable. What is the level of measurement for the variables? Boston University has the most students of 36,104 among Massachusetts Colleges. A. A random sample of 72 statistics students generated the following 90% confidence interval: (0.438, 0.642). Suppose that X and Y are random variables. Gender b. True or false? 32 degrees Fahrenheit could be a value represented by this variable). Determine whether the statement is true or false. ", c.)The winning ticket number was announced as 329.An attendee looked around the room and commented,"It doesn't look like there are 329 people in attendance.". What is the Massachusetts average public schools student:teacher ratio? In one study of the relationship, r^2 is 0.45. What would the dependent and independent variables be in the two hypothesis below? Discover how the GED test empowers individuals without a traditional high school diploma to unlock opportunities for further education and career success. Fill the rings to completely master that section or mouse over the icon to see more details. # Students: 2,157. (For a given variable), a sample average for a single sample group should always be the same as the population average (if it were known). The number of dummy variables must equal 1 less than the number of categories of the qualitative variable. C. a. Perform a hypothesis test at the 95 percent level to determine if the semester GPA of all OU freshmen is less than, \\ What is the explanatory variable, and is it quantitative or categorical? d. Categorical variable. a) Standard deviation of the sampling means =, Suppose you are testing the statistical significance (at the 5% significance level) of a parameter estimate from the estimated regression equation: Y = a + bR + cS + dW which is estimated using a ti. The schools have not report the information to the IPEDS or not applicable. Quantitative Researchers often prefer to use quantitative data over qualitative data because it lends itself more easily to mathematical analysis. B. Color of cars. We learned in class that the sample mean is the best linear unbiased estimator (BLUE) for the unknown \m, {Blank} is used as an estimate of reliability and involves administering a test with x number of items designed to assess a topic and then statistically analyzing the degree to which responses to the items vary together. Classify the variable as qualitative or quantitative. The variable is quantitative because it is an attribute characteristic O B. True False. More about the data. # Students Range: 1,714 4,046 Avg. All other trademarks and copyrights are the property of their respective owners. b. The project takes longer than 30 weeks c. The project is completed between 30 and 36 wee, A confidence interval was used to estimate the proportion of statistics students who are females. Classify the following variable as categorical (possibly binary) or quantitative. . The number of minutes it takes for a group of 28 students to walk 3 miles was recorded. Define and give an example of Qualitative variables. If quantitative, is it discrete or continuous? Qualitative or Quantitative: Personnel What level of measurement is this category? In a frequency distribution, the class mark is the number of observations that fall within that class. State whether the following statement is True or False: The Student t distribution is different for different sample sizes. Identify the following variables as : purely categorical (or qualitative), categorical and ranked, quantitative and discrete or quantitative and continuous: a) the number of students who get a final grade greater than 80% b) dress size: 3, 5, 7, 9, 11, 13 Enrollment 2. For example, it does not make sense to find an average hair color or blood type. Season of the year j. a) What is the difference between qualitative and quantitative data? If the student's quiz scores for the first three weeks are 2, 6, and 10, then the mean score is M = 9. a. The probability of a randomly selected student having the flu next week is 0.3. The two random variables are independent. Student t distribution table is used when sample standard deviations are known and normally distributed population. True False Uncertain Explain. Explain. For a continuous random variable, the total area beneath the PDF must be one. The null hypothesis to be tested is H 0 : p 1 = p 2 = p 3 = p 4 = 0.25. . Mark all that apply. There are two types of quantitative data continuous and discrete. Explain. Learn about the definition of bias in statistics. A. A. The color of the houses in a neighborhood. He needs to forecast the number of students who will seek appointments. If all the students guess on each question, how many students would you expect to get 17 or more questions correct? These types of data are sorted by category, not by number. This had a variance of .25. (b) Estimate the correlation. Eye color B. Explain what bias there is in a study done entirely online. Boom! A discrete variable always yields numerical values. b. Qualitative or Quantitative: Outpatient Visit What level of measurement is this category? Her assistant took a random sample, What is the meaning of : a) Statistical inference b) Sampling distribution c) Acceptance region d) test statistic e) Critical value of a test f) Level of significance g) The p value, Averaging techniques are useful for: A. distinguishing between random and nonrandom variations. B. All rights reserved. Qualitative or Categorical Data Qualitative or Categorical Data is data that can't be measured or counted in the form of numbers. What is public high school and public elementary school with the lowest student:teacher ratio in Massachusetts? The mean oxygen level is 4.62mg, with the overall standard deviation of 0.92. Work Experi, a. The chi-square test of a contingency table is a test of independence for: A. True or false? O A. Consider the following variable: Classification of children at a daycare (infant, toddler, preschool). 2. 0.32 C. 0.4 D. 0.16 E. 0.8, Link the following items to the classifications of forecasting techniques : - Associative - Time-series - Qualitative - All forecasting techniques, How many observations should a time study analyst plan for in an operation that has a standard deviation of 1.3 minutes per piece if the goal is to estimate the mean time per piece to within 0.4 minute with a confidence of 95.5 percent? The time it takes a randomly selected student to complete an exam is a discrete random variable. (c) Explain why your r-value is reasonable based on the scatterplot. Determine which of the following data is quantitative or qualitative: The marks that students get in a test. This data comes from quantitative research that can have an inherent zero among the values of the statistical data gathered. An example of a nominal scale variable is the telephone number of an individual. Classify the following variable as categorical (possibly binary) or quantitative. If a random sample of 5 students is selected, what is the probability that the sample contains exactly three graduate students, Calculate the number of classes if there are 130 observations in a data set. Gain insights into how these factors shape educational experiences and outcomes for students. Levels of measurement DRAFT. Using the information above, what total size sample. Height. There are a lot of similarities between U.S. News and Colleges of Distinction. The sample size =4. a) True b) False, A frequency distribution allows you to study the pattern between two variables. The student t distribution is same for different sample sizes. a. qualitative and quantitative b. mathematical and statistical c. judgmental and qualitative d. historical and associative e. judgmental and associative, A professor of statistics is interested in studying the relationship between the number of hours graduate students spent studying for his comprehensive final exam and the exam score. This variable is a continuouscontinuous numerical variable that is ratioratio-scaled. Gender is a descriptive variable, therefore, a study gathering this kind of information would be collecting qualitative data. False. c. Age. This paper aims to explore the relationship between note-taking and interpreting quality in consecutive interpreting. The dean wa, A university administered the SERVQUAL survey to its customers as a way to assess its current position in the market. Examples of qualitative and quantitative data On this section we will use the quantitative and qualitative data definitions we saw above and answer a few data classification examples. The number of customers visiting a store over a weekend. A total of five o, What is statistical variance? The independent variable is the variable you wish to explain. True or false? Arithmetic mean _________ b. Of a total of 74,232 public school seniors in 2020, the state had an 89% graduation rate, according to data from the Department of Elementary and Secondary Education. Assume t, The ANOVA summary table below is for a multiple regression model with four independent variables. A) Attribute data B) Qualitative data C) Quantitative data D) Sample data. IDs), ask yourself if an average makes sense if not, then it's qualitative not quantitative. The population standard deviation is unknown and the test results in. (i) Name a suitable probability distribution to model variable X, stating the paramet, Today, full-time college students report spending a mean of 27 hours per week on academic activities, both inside and outside the classroom. A true/false test has 20 questions. Describe two quantitative variables and two categorical variables that you might wish to measure. b. Simple, right? First-listed diagnosis 2. One of the most obvious ways to categorize information is by whether it is quantitative or qualitative. Once more, make sure you identify which items in the above list are discrete and which are continuous before checking our answers and explanations below: You can count the number of customers in the store and the resulting quantities are whole numbers. We will focus more on what a statistical population is and how to obtain a representative sample of it in our next lesson about sampling methods. Is the amount of gasoline put into a car a quantitative or qualitative variable? 1 / 43 In a survey conducted in the town of Atherton, 25% of adult respondents reported that they had been involved in at least one car accident in the past ten years. True or False. State True or False: The median always exists in a set of numerical data. It is used to test or confirm theories and assumptions. Qualitative variables are associated with an expression of words or phrases using words. )The winning ticket number was announced as 329. Become a Study.com member to unlock this answer! Student i.d number determine whether the quantitative variable is discrete or continuous. Standardized tests have a long history in American K-12 education. Pepsi considers a tolerance o, ____ is the term used to describe the set of statistical tools used by quality professionals for the purpose of quality control. Then specify whether each variable is categorical or quantitative. 1. 0.66 B. Quantitative data may be either discreteor continuous. Createyouraccount. Homework problems? A researcher studies the factors that determine the number of children future couples decide to have. Calculate the number of classes if there are 65 observations in a data set. Stay on track with our daily recommendations. False, The median of the values 3.4, 4.7, 1.9, 7.6, and 6.5 is 4.05. a) True b) False. 3. Counting the number of cups of coffee that a store sold in a given day would be an example of a/an: (A) performance appraisal (B) subjective appraisal (C) objective appraisal (D) trait appraisal. The main purpose of statistics is to be able to characterize a large population group based on the information gathered from a representative sample of it, in other words, statistical analysis allows us to use simple techniques to obtain information about a large group without having to scrutinize every single subject of the group, just a sample of them, making a study much more efficient. 71% average accuracy. Cluster analysis can only be performed on continuous variables. c) What kind of data can only assume certain values such as the number of bedrooms in a home? Answer the followi, {Blank} schedules are designed to reinforce behaviors at random points in time. In total, GPT . What can the analyst conclude given this information? B. no. A. The random variable Y has mean -3 and standard deviation 4. NOTES: Graduation rates are not reported for cohort counts fewer than 6. True or False: The distribution of sample x will, as the sample size. 1.) Is the amount of time a student spends studying for an exam a quantitative or qualitative variable? The largest public school in Massachusetts (by enrollment) is Brockton High School with 4,046 students. Magnitudes that can take any value (for example the time or position in ideal movements) are continuous variables. Conduct a two sample t-test on the following data on ages of students in two college classes: H_0: mu_1 - mu_2 = 0, H_1: mu_1 - mu_2 is not equal to 0. True b. Junior high school students, as a special group, may experience foreign language learning anxiety different from anxiety experienced by college students in the process of online English learning. (b) Number of days absent in. What is the probability that a rando. True or False: Another name for an explanatory variable is the dependent variable. Identity the type data (qualitative-quantitative) and the level of measurement for the following variable Explain your choice The name of the textbook used in a statistics class Are the data qualitati. Identify the level of measurement used in the following scenarios (nominal, ordinal, interval or ratio): Have you gotten your answers ready?
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