A data set includes data from student evaluations of courses. The summary statistics are n=92, x = 4.16, s= 0.57. Use a 0.10 significance level to test the claim that the population of student course evaluations has a mean equal to 4.25. Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. What are the null and alternative hypotheses? O A. Họ: H= 4.25 O B. Ho: =4.25 H: u<4.25 H1: u>4.25 OC. Ho: u#4.25 D. Họ: H=4.25 H:µ=4.25 H:H44.25 Determine the test statistic. (Round to two decimal places as needed.)

The average American gets a haircut every 38 days. Is the average larger for college students? The data below shows the results of a survey of 12 college students asking them how many days elapse between haircuts. Assume that the distribution of the population is normal. 41, 36, 37, 39, 33, 46, 42, 35, 40, 46, 31, 40 What can be concluded at the the a = 0.05 level of significance level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? Select an answer H1: ? V Select an answer c. The test statistic ? V (please show your answer to 3 decimal places.) |(Please show your answer to 3 decimal places.) d. The p-value = e. The p-value is ? Va f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... the null hypothesis. O The data suggest the population mean number of days between haircuts for college students is not significantly higher than 38 at a = 0.05, so there is insufficient evidence to…

Forty- four sixth Graders were randomly selected for a school district. then they were divided into 22 to match pairs, each Paris having equal IQs. one member of each pier was randomly selected to receive special training. then all the students were giving an IQ test. test results are summarized below. Do these results provide evidence that the special training helped student performance? Use a 0.05 level of significance. Assume that the mean difference are approximately normally distributed.

I only need the p-value and the interpretation please and thank you!    A child psychologist is investigating if the attention span of 10-year old children is greater than 25 minutes. The psychologist selects a random sample of 64 ten-year old’s and measures their attention span.  The result is a mean of ? = 25.65  Test the claim that the mean attention span of 10-year old children is greater than 25 minutes with a 5% significance level if the population standard deviation is assumed to be ? = 2.5 minutes.     State the null and the alternative hypothesis. Use the guidelines established in class.       Draw and fully label the rejection regions.         Calculate the test statistic.         Determine the p-value. Illustrate the p-value in the diagram in part b.  State the answer to four decimal places.           Give the decision about the null hypothesis.                                                 Reject Ho                                 Fail to Reject Ho Interpret the…