10, 20, 12, 17, 16 a. Calculate the sample variance and sample standard deviation. b. Calculate the 2-score for each of

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10 20 12 17 16 A Calculate The Sample Variance And Sample Standard Deviation B Calculate The 2 Score For Each Of 1 (58 KiB) Viewed 80 times

10, 20, 12, 17, 16 a. Calculate the sample variance and sample standard deviation. b. Calculate the 2-score for each of the observations. Fou are given the following sample containing households' income and spending data. Assume the Distributions are bell shaped. Spending (in thousand $) Income (in thousand $) 5.9 6.4 4.2 4.9 5.9 5,4 6.0 7.3 4.5 5.5 a. Calculate the sample variance and sample standard deviation for both spending and income. b. For the first person/observation in the sample, find the number of standard deviations that spending and income are from their means. c. Find the values of spending for which sixty-eight percent of all the values of lie between. d. What percentage of households had income between $4.18 and $7.82? e. Calculate sample covariance. Interpret the covariance. f. Calculate the sample correlation coefficient. Interpret the result. 8. Calculate the least squares/regression slope and intercept using spending as the dependent (or y) variable. Interpret the results. By how much will spending increase if household income
lations that spending and income are from their means. Find the values of spending for which sixty-eight percent of all the values of lie between What percentage of households had income between $4.18 and $7.82? Calculate sample covariance. Interpret the covariance. Calculate the sample correlation coefficient. Interpret the result. Calculate the least squares/regression slope and intercept using spending as the dependent (or y) variable. Interpret the results. By how much will spending increase if household income increases by two thousand dollars? Predict a household's spending if their income is 5.6 thousand dollars?
You are given the following sample of students' homework average and exam average. Assume the distributions are bell shaped. Homework Average Exam Average 81.9 87.3 86.7 79.6 78.5 68.0 97.5 92.3 93.3 86.3 a. Calculate the sample variance and sample standard deviation of both variables. b. For the last person/observation in the sample, find the number of standard deviations that each observation is from its respective mean. C. Calculate the proportion of exam averages that lie between 63.9 and 101.5. d. What percentage of homework averages are between 79.7 and 95.4? e. Calculate sample covariance. Interpret the covariance. f. Calculate the sample correlation coefficient. Interpret the result. 8. Calculate the least squares/regression slope and intercept using homework average as the independent (x) variable. Interpret the slope and intercept. Find the change in a student's exam average if their homework average increased 0.5 percentage points. Predict a student's exam average if their homework average is 81.0.
C. Calculate the proportion of exam averages that lie between 63.9 and 101.5. d. What percentage of homework averages are between 79.7 and 95.4? e. Calculate sample covariance. Interpret the covariance. f. Calculate the sample correlation coefficient. Interpret the result. g. Calculate the least squares/regression slope and intercept using homework average as the independent (x) variable. Interpret the slope and intercept. Find the change in a student's exam average if their homework average increased 0.5 percentage points. Predict a student's exam average if their homework average is 81.0. 4. You are given the following information on the price of diesel and the price of crude oil: Descriptive Measure Diesel Price Oil Price Mean 1.973 0.989 Standard Deviation 1.044 0.688 Covariance 0.698 a. Calculate the sample correlation coefficient. Interpret the result. b. Calculate the least squares/regression slope and intercept using oil price as the independent (x) variable. Interpret the slope and intercept. C. The current price of oil is 1.606. Calculate the predicted price of diesel using this price of oil. d. Find the change in the price of diesel if the price of oil increases to 1.75.