

please make sure you follow the 6 bullets points



please make sure you follow the 6 bullets points Directions for Confidence Interval Problems: For Questions...
An experiment reported in Popular Science compared fuel economies for two types of similarly equipped diesel mini-trucks. Let us suppose that 12 Volkswagen and 10 Toyota trucks were tested in 90 kilometer-per-hour steady paced trials. The sample of 12 Volkswa- gen trucks averaged 16 kilometers per liter with a standard deviation of 1.0 kilometer per liter and the sample of 10 Toyota trucks averaged 11 kilometers per liter with a standard deviation of 0.8 kilometer per liter. Assume that the...
Directions for Confidence Interval Problems: For Questions 1 to 3, include the following information in your solution: • Does your problem involve 1 population or 2 populations? . State a. • State whether you should use z or X2 • Find / provide the appropriate value (z or x2) from the table (or your calculator). Round z-values to 2 decimals, and round X2-values to 3 decimals. • Find the confidence interval. Round your final values to 3 decimals. • State...
a) Use the t-distribution to find a confidence interval for a difference in means μ1-μ2 given the relevant sample results. Give the best estimate for μ1-μ2, the margin of error, and the confidence interval. Assume the results come from random samples from populations that are approximately normally distributed. A 90% confidence interval for μ1-μ2 using the sample results x¯1=8.8, s1=2.7, n1=50 and x¯2=13.3, s2=6.0, n2=50 Enter the exact answer for the best estimate and round your answers for the margin...
Use a t-distribution to find a confidence interval for the difference in means μd=μ1-μ2 using the relevant sample results from paired data. Assume the results come from random samples from populations that are approximately normally distributed, and that differences are computed using d=x1-x2 . A 95% confidence interval for μd using the paired difference sample results x¯d=3.1, sd=2.4, nd=30. Give the best estimate for μd, the margin of error, and the confidence interval. Enter the exact answer for the best...
Use a t-distribution to find a confidence interval for the difference in means μd=μ1-μ2 using the relevant sample results from paired data. Assume the results come from random samples from populations that are approximately normally distributed, and that differences are computed using d=x1-x2. A 95% confidence interval for μd using the paired difference sample results x¯d=3.5, sd=2.0, nd=30. Give the best estimate for μd, the margin of error, and the confidence interval. Enter the exact answer for the best estimate,...
Suppose you wish to compare the means of six populations based on independent random samples, each of which contains 5 observations. The values of Total SS and SSE for the experiment are Total SS = 21.1 and SSE = 16.5. The sample means corresponding to populations 1 and 2 are x1 = 3.06 and x2 = 2.21. 1. Find a 95% confidence interval for μ1. (Round your answers to three decimal places.) 2. Find a 95% confidence interval for the...
Use a-distribution to find a confidence interval for the difference in means ?1-112 using the relevant sample results from paired data. Assume the results come from random samples from populations that are approximately normally distributed, and that differences are computed using dx12 A 95% confidence interval for ? 1-2 using the paired data in the following table Case Situation 1 Situation 2 85 2 79 84 3 95 89 78 76 62 89 91 4 63 70 71 7 86...
Having the worst time trying to answer these three questions below. Assume that σ21=σ22=σ2. Calculate the pooled estimator of σ2 when the first sample gives s21=128 and the second independent sample gives s22= 128, and n1=n2=36. Give your answer to two decimal places , do not round up or down. And .. Two independent random samples have been slected ; 111 observations from population one and 143 observations from population two. From previous experience it is known that the standard...
Consider the following competing hypotheses and accompanying sample data drawn independently from normally distributed populations. (Note: the automated question following this one will ask you confidence interval questions for this same data, so jot down your work.) H0: μ1 − μ2 = 0 HA: μ1 − μ2 ≠ 0 x−1x−1 = 60 x−2x−2 = 56 σ1 = 1.62 σ2 = 10.20 n1 = 25 n2 = 25 Calculate the value of the test statistic. (Negative values should be indicated by...
Part 2: Extended Response (69 points total) Directions: Be sure to show all work in support of your final answers. Include calculator functions, symbols, and units for all answers. You are NOT permitted to use the "Interval" functions on the calculator to show your work. Round decimals to the indicated place values. 2) According to Moebs Services Inc., an individual checking account at major U.S. banks costs the banks between $350 and $450 per year. A recent random sample of...