In a current study, a random sample of 20 teachers from Georgia and an independent random sample of 20 teachers from Indiana have been asked to report their annual income. The data obtained are as follows. Georgia Annual income in dollars 29227, 35464, 45458, 32113, 29125, 38494, 23709, 32874, 34046, 21221, 39527, 56140, 38977, 47806, 44866, 36325, 34654, 38647, 37073, 36344 33567, 41744, 51186, 30464, 51606, 42617, 48830, 41455, 49371, 40828, 44007, 42605, 34923, 30519, 42581, 52952, 45651, 45084, 35455, 27800 Send data to calculator Indiana Send data to Excel The population standard deviations for the annual incomes of teachers in Georgia and in Indians are estimated as $6500 and $6350, respectively. It is also known that both populations are approximately normally distributed. Construct a 90% confidence interval for the difference , ₂ between the mean annual income of teachers from Georgia (,) and the mean annual income of teachers from Indiana (4₂). Then find the lower limit and upper limit of the 90% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. (If necessary, consult a list of formulas.)

A random sample of 20 U.S. weddings yielded the following data on wedding costs in dollars: 12208, 28018, 21048, 15302, 13313, 7516, 30976, 22085, 14163, 16900, 17750, 32217, 10372, 14469, 16424, 16730, 20606, 13211, 33560, 13177 a) Use the data to obtain a point estimate for the population mean wedding cost, μ, of all recent U.S. weddings. Note: The sum of the data is 370045. x¯= b) Is your point estimate in part (a) likely equal to μ exactly (yes or no)?

In a study by the Child Health and Development Studies, all pregnancies between 1960 and 1967 among women in the Kaiser Foundation Health Plan in the San Francisco East Bay area were reviewed. The collected information included: . . . . ● The weight of the infants in ounces (bwt) The length of pregnancy in days (gestation), The mother's age in years (age), The mother's height in inches (height), The mother's pregnancy weight in pounds (weight), Whether the child was the first born (first_pregnancy), and Whether the mother was a smoker (smoke). The following tables are generated by Rguroo's linear regression analysis performed on part of the data: Cases Used in the Analysis Data Used Number of cases read Number of cases used in analysis Number of incomplete cases (omitted) Term (Intercept) gestation age height weight smoke Yes first_pregnancy Yes Residual Standard Error Regression Coefficients Estimates Coefficient Standard Estimate Error -73.887 0.43676 -0.11761 0.93463 0.054383 8.1294…

Suppose the HR manager of a company is interested in determining whether there is a difference in employee satisfaction across three different office locations. They randomly select 20 employees and ask each employee to rate their satisfaction with each office location on a scale of 1 (very dissatisfied) to 5 (very satisfied). The data are presented below: Employee HNM st in 6780 1 2 3 4 5 8 9 10 11 Office Location Location Location Location B с 435N & MINN 2 4 3 5 2 4 12 13 14 15 16 17 18 19 20 MINN MINN45 3 4 5 2 3 3 2 L43524 3 m st 4 3 WNS WANUAWN SE 5 2 3 4 5 2 4 3 5 2 3 3 MNAMIN NAMIN INI Min min 2 4 3 5 2 4 3 5 2 5 4 3 2 4 2 5 3 5 4