her 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 - (fa 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 a = 0.01, can you support the university's claim? Complete parts (a) through (d) below. Assume the population is normally distributed. le sc nme 38 26 28 32 35 43 24 23 300 e sc 29 31 33 30 26 29 31 29 23 eboc (a) Write the claim mathematically and identify Ho and H,. te scc Which of the following correctly states Ho and H,? il O A. Ho: = 32 OB. Ho: us 32 OC. Ho: u= 32 H u32 OF. H: u2 32 oxt H u> 32 cessibl source O D. Ho: <32 H, p2 32 OE. Ho: u> 32 Hius32 Hu<32 ols for (b) Use technology to find the P-value. ultimed p-(Round to three decimal places as needed.) (c) Decide whether to reject or fail to reject the null hypothesis. Which of the following is correct?

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I need help explaining parts a and b.

Game Attendance An athletic director suggests the median number for the paid attendance at 18 local football games is 3000. The data for a sample are shown. At a 0.05, is there enough evidence to reject the claim? If you were printing the programs for the games, would you use this figure as a guide? 4231 5605 2556 5228 5586 3675 3867 3610 4679 5676 5779 4745 2907 4925 4785 4551 3112 3688 Send dats to Excel Part: 0/6 Part 1 of 6 (a) State the hypotheses and identify the claim with the correct hypotheses Ho (Choose one) (Choose one) This hypothesis test is a (Choose one) test. 00000-0 D-D

Save Suppose a random sample of n = 390 teenagers 13 to 17 years of age was asked if they use social media. Of those surveyed, 276 stated that they do use social media. Find the sample proportion of teenagers 13 to 17 years of age who use social media. The sample proportion is p= (Round to three decimal places as needed.)

You want to compare differences in prior arrests across ethnicity in your study, you measured ethnicity as white =0 black =1 hispanic=2, and other =3. Prior arrests was recorded as the number of prior arrests. which test would you perform to see if arrests differ across diffrent ethnic categories? A. ANOVA B. T-test

Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who own smartphones. Assume that you want 95​% confidence that your error is no more than 0.03.