A business journal investigation of the performance and timing of corporate acquisitions discovered that in a random sample of 2,780 firms, 690 announced one or more acquisitions during the year 2000. Does the sample provide sufficient evidence to indicate that the true percentage of all firms that announced one or more acquisitions during the year 2000 is less than 27 %? Use a = 0.10 to make your decision. What are the hypotheses for this test? O A. Ho: p<0.27 H p=0.27 OC. Ho: p#0.27 Hp= 0.27 O B. Ho: p=0.27 H p>0.27 D. Ho: p=0.27 Haip<0.27 O E. Ho: p>0.27 H, ps0.27 OF. Ho p=0.27 H p#0.27 What is the rejection region? Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to two decimal places as needed.) O A. z> O B. z< - 1.28 or z> Calculate the value of the z-statistic for this test. z= |(Round to two decimal places as needed.)

The following table contains observed frequencies for a sample of 200. Row Variable P Use Table 3 of Appendix B to find the p-value. The p-value is - Select your answer - What is your conclusion? - Select your answer - Column Variable A 40 Q Test for independence of the row and column variables using a = 0.05. Compute the value of the X² test statistic (to 2 decimals). 10 в с 48 22 45 35

I need help with a stat problem, section 7.2 and 7.3, thank you (please help with TI-84 commands) You receive a brochure from a large university. The brochure indicates that the mean class size for​ full-time faculty is fewer than 32 students. You want to test this claim. You randomly select 18 classes taught by​ full-time faculty and determine the class size of each. The results are shown in the table below. At α=0.10​, can you support the​ university's claim? Complete parts​ (a) through​ (d) below. Assume the population is normally distributed.   38  29  29  31  30  41  25  23  30  27  31  33  36  31  29  32  27  23     (a) write the claim mathematically and identify Ho and Ha.       (b) use technology to find the P-value.  P= _____________(round to 3 decimal places) (c) decide whether to reject or fail to reject the null hypothesis. Which of the following is correct? A. reject Ho because the P value is less than the significance level. B. reject Ho because the P value is greater…

The following are the lengths of stay (in days) for a random sample of 16 patients discharged from a particular hospital: 13, 9, 5, 11, 6, 3, 12, 10, 11, 7, 12, 12, 12, 9, 9,9 Send data to calculator Draw the histogram for these data using an initial class boundary of 2.5 and a class width of 2. Note that you can add or remove classes from the figure. Label each class with its endpoints. Frequency S 0 This f Length of stay (in days) 0 Tom 0:00 00:0 X

Is the racial distribution for students on work-study different from the racial distribution for students not on work-study? The results of a recent study are shown below. Frequencies of Race for Students On and Not On Work-Study k Hispanic Asian 53 White Black Other Work Study 96 44 78 28 Not Work Study 82 66 108 86 32 R vector Data: 96,82,44,66,78,108,53,86,28,32 Contingency Table What can be concluded at the a = 0.05 significance level a. What is the correct statistical test to use? Setect an anserV b. What-are the matt and atternative hypotheses? Ho: Select an answer H1: Select an answer THE test-statistic for this data = (Please show your answer to three decimal places.) Sd. The p-value for this sample = (Please show your answer to four decimal places.) e. The p-value is Select an answer Based-en this, we should Seleet-an anower Thus, the final conclusion is... Select an answer Select an answer At the 5% significance level, the data provides insufficient evidence to conclude that…