The average American gets a haircut every 37 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. 37 29 35 39 34 42 41 29 48 44 40 41             The null and alternative hypotheses would be:       H0:H0:  ? μ p  Select an answer = ≠ > <        H1:H1:  ? p μ  Select an answer = < > ≠    The test statistic? z t  = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 3 decimal places.)

Five pulse rates are randomly selected from a set of measurements. The five pulse rates have a mean of 67.0 beats per minute. Four of the pulse rates are 54, 82, 53, and 90. a. Find the missing value. b. Suppose that you need to create a list of n values that have a specific known mean. Some of the n values can be freely selected. How many of the n values can be freely assigned before the remaining values are determined? (The result is referred to as the number of degrees of freedom.) a. The missing value is beats per minute. (Type an integer or a decimal. Do not round.)

Five pulse rates are randomly selected from a set of measurements. The five pulse rates have a mean of 76.6 beats per minute. Four of the pulse rates are 82, 59, 84, and 89. a. Find the missing value. b. Suppose that you need to create a list of n values that have a specific known mean, Some of the n values can be freely selected. How many of the n values can be freely assigned before the remaining values are determined? (The result is referred to as the number of degrees of freedom.)

In a population of normally distributed scores,   = 230 and   = 10. Approximately what percentage of random samples of 25 scores would have means with a value in the range 228 to 232?     87     68     31       77

When we test the hypothesis that the population proportions are equal, we can use the Z test for a one-sided as well as a two-sided alternative. Select one: a. False b. True C. Not sure

Members of fraternities and sororities are required to volunteer for community service. Do fraternity brothers work fewer volunteer hours on average than sorority sisters? The data below show the number of volunteer hours worked for thirteen randomly selected fraternity brothers and eleven randomly selected sorority sisters. Brothers: 14 7 11 13 9. 11 8 12 7 13 10 13 Sisters: 13 19 16 11 11 19 5 10 16 17 7 | d. The p-value is ? O a e. Based on this, we should Select an answer the null hypothesis. f. Thus, the final conclusion is that ... The results are statistically significant at a = 0.05, so there is sufficient evidence to conclude that the population mean volunteer hours for fraternity brothers is less than the population mean volunteer work hours for sorority sisters. The results are statistically insignificant at a = 0.05, so there is insufficient evidence to conclude that the population mean volunteer hours for fraternity brothers is less than the population mean volunteer work…

A. P value=  b. Is the p-value >,< a  c. Accept, reject, or hypothesis

Scenario: 200 people were asked, “Who is your favorite superhero?” Below are the data.  Test the null hypothesis that the population frequencies for each category are equal.  α= .05. Iron Man Black Panther Wonder Woman Spiderman fo = 40 fo = 60 fo =55 fo = 45 fe = fe = fe = fe =   What is the correct result based on the data?

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Copy each table to the Word document and highlight theappropriate p-value. Under each table type the hypotheses, decision and summary, using the resultsfrom Excel, again you should not be doing the calculations by hand! A random sample of 16 students selected from the student body of a large university was selected. We wantto determine if the average age of all the students at the university is significantly different from 24. Assumethe distribution of the population of ages is normal. t-Test: Paired Two Sample for Means           Variable 1 Variable 2 Mean 22.8125 0 Variance 10.5625 0 Observations 16 16 Pearson Correlation #DIV/0!   Hypothesized Mean Difference 24   df 15   t Stat -1.461538462   P(T<=t) one-tail 0.082249947   t Critical one-tail 1.753050356   P(T<=t) two-tail 0.164499893   t Critical two-tail 2.131449546   I am struggling with the explanation. How would I write this out? Thanks!