A professor wants to know which type of instructional mode students had more satisfaction.  The professor randomly selected n = 5 students from each of the following types of classes: online only, hybrid, and face-to face only.  Student were given a satisfaction survey.  Are their differences in student satisfaction among the different instructional modes.  The data are below: Online Hybrid Face-to-Face 3 3 4 3 3 1 3 1 3 2 2 2 2 1 3 Calculate Mean Square Between Group (MSBG)

Bank of America's Consumer Spending Survey collected data on annual credit card charges in seven different categories of expenditures: transportation, groceries, dining out, household expenses, home furnishings, apparel, and entertainment. Using data from a sample of 42 credit card accounts, assume that each account was used to identify the annual credit card charges for groceries (population 1) and the annual credit card charges for dining out (population 2). Using the difference data, the sample mean difference was d = $850 , and the sample standard deviation was sa = $1,123. a. Formulate the null and alternative hypotheses to test for no difference between the population mean credit card charges for groceries and the population mean credit card charges for dining out. Ho : Hd is equal to 0 Ha : Hd is less than or equal to 0 b. Use a = 0.05 level of significance. Can you conclude that the population means differ? differ What is the p-value? (to 6 decimals) C. Which category,…

Grand Jury indictment data for Gloucester Country, New Jersey, are published every week in the Gloucester Country Times newspaper (www.nj.com/gloucester). The following data are the number of indictments for a sample of 11 weeks selected from July 2010 through June 2011: 35 13 17 21 21 29 20 26 24 13 23   Find the mean, median, and mode for these data.Enter the exact answers. Enter the modes in increasing order. If there is only one mode, enter it first and enter “NA” in the second answer region.   Mean = Enter you answer; Mean indictmentsMedian = Enter you answer; Median indictmentsMode = Enter you answer; Mode 1 , Enter you answer; Mode 2 indictments

The second slide is the first part of the question  and the first slide is the second part of the question

A researcher records the levels of attraction for various fashion models among college students. He finds that mean levels of attraction are much higher than the median and the mode for these data. What is the shape of the distribution for the data in this study?     What measure of central tendency is most appropriate for describing these data? Why?

In the United States, standardized testing is used to compare students' knowledge retention across the country. States will often use the results of standardized testing to allocate funding to districts within the state. One state in particular wanted to determine whether there was a difference in scores between schools on the eastern side of the state and schools on the western side of the state. A random sample of 30 schools on the eastern side and 35 schools on the western side were chosen. The mean score for the eastern schools was  x1 = 109  with a standard deviation of 5.3. The mean score for the western schools was  x2 = 104  with a standard deviation of 4.4. We would like to estimate the difference in the mean standardized scores from the eastern schools and western schools and determine the margin of error of this estimate with 98% confidence. (a) Determine the point estimate for the difference in mean standardized scores for the eastern and western sides of the state,  ?1 −…

Imagine a researcher wants to determine whether the participants in his sample are skewed toward being more Republican or Democrat on average. He uses a 7-point scale, with 1 = very Democratic, 2 = Democratic, 3 = somewhat Democratic, 4 = neither Democratic or Republican, 5 = somewhat Republican, 6 = Republican, 7 = very Republican. Would he use a single sample, dependent samples, or independent samples t test to analyze his data? Explain your answer.

Which statistical method would be most effective to determine if the average size of dogs in Europe was different than the average size of dogs in the U.S.?  Why?

If a teacher wants to assess whether there is a relationship between males and females on test performance, the most appropriate statistical test would be

Reuben is a human resources executive for a technology company. He is deciding between two types of plans for vacation allowance for the employees of the company: Unlimited and Traditional. Reuben wants to determine, for workers in the tech industry, if the yearly mean number of vacation days taken by workers with an Unlimited plan is greater than the yearly mean number of vacation days taken by workers with a Traditional plan.Reuben surveys a random sample of 17 workers who have the Unlimited plan and a random sample of 15 workers who have the Traditional plan. (These samples are chosen independently.) For each worker, he records the number of vacation days taken last year. For the workers with an Unlimited plan, the sample mean is 18.9 with a sample variance of 30.8. For the workers with a Traditional plan, the sample mean is 17.4 with a sample variance of 6.1.Assume that the two populations of vacation days taken are approximately normally distributed. Can Reuben conclude, at the…