Sample size analysis Consider the same simple random sample. This time we'll keep the level of confidence constant and vary the sample size. Round results to 1 decimal place. * = 63 mph s = 10 mph 1. Construct the 95% confidence interval for vehicle speeds with n = 50 2. Construct the 95% confidence interval for vehicle speeds with n = 100 3. Construct the 95% confidence interval for vehicle speeds with n 500 In 1-2 complete sentences describe the effect increasing the sample size on the confidence interval.

Empathy among police officers influences how they interact with citizens and the likelihood that they receive complaints. Gender differences in levels of empathy in the general population are not large but male and female officers have been shown to have different interaction styles with the public; this may be due to the different empathy levels. After sampling officers and measuring their levels of empathy you find the following data.   Males       Females   n = 6 n = 9 M = 31 M = 45 SS = 490 SS = 680   If you were going to make gender comparisons like this, which option would be the correct choice?  Write A or B in the box. [a]            Option A. Independent-measures t-test            Option B. Repeated-measures t-test

how do i solve parts A-F?

The table shows the values found in the error analysis.  What method of forecasting would be best to use?  What is the forecasted value?        MSE forecast for week 13 Time Series 1.08 14.76 3-week MA 3.04 13.67 exp smoothing 11.04 9.5

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Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 5 inches. The heights of 9 randomly selected students are 73, 66, 64, 67, 70, 63, 64, 72 and 72. = _______ Margin of error at 90% confidence level = ________  90% confidence interval =  _______, _________

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Please help with question 5 a-b

Part D. Please show TI 84 steps