I cannot figure out how they are getting the answer to b

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Homework: Week 7 Homework 40 pts Score: 26? of 4 pie 4 15 of 16 (16 complete) v p HW Score: 966794;, 38,6? of 40 5115 69 7.4.15 3; Question Help {I A humane society claims that less than 31% of U.S. households own adog. in a random sample of 392 LLS. households, 151 say they own adog. At a: 0.10, is there enough ewdence to support the societyfs claim?
(a) Write the claim mathematically and identify HO and Ha. (b) Find the cntical value(s) and identify the rejection region(s). (c) Find the standardized test statistic. (d) Decide whether to reject or fail to reject the null hypothesis, and
(e) interpret the decision in the context of the original claim. (a) Which of the following correctly states HO and Ha? 1;. Hu: p<0,31 8 Ho: ps031
Ha: p20.31 HE: p) 0.31
. c. Ha: p=0.3‘l .33 H}: [20.31
Ha: p#0,31 Ha: p<0,31 (b) What is (are) the critical value(s]7 The critical valuefis] islaie ID
(Use a comma to separate answers as needed. Round to two decimal places as needed.) mammmmmmmi a pans
remaining – Clear All Enter your answer in the answer box and then click Check Answer.

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