Question

• Question 13 A well-known brokerage firm executive claimed that at least 31 % of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that out of 109 randomly selected people, 32 of them said they are confident of meeting their goals. Suppose you are have the following null and alternative hypotheses for a test you are running: Ho:p = 0.31 H:P + 0.31 Calculate the test statistic, rounded to 3 decimal places Submit Question • Question 14 According to a University Center for Logistics Management, 10% of all merchandise sold in the United States gets returned. A Seattle department store sampled 88 items sold in January and found that 8 of the items were returned. If you have the following null and alternative hypotheses for a test you are running: Ho:p= 0.1 He:p < 0.1 Calculate the test statistic, rounded to 3 decimal places z=

Answer 1

13)

Test statistic,
z = (pcap - p)/sqrt(p*(1-p)/n)
z = (0.2936 - 0.31)/sqrt(0.31*(1-0.31)/109)
z = -0.37

14)

Test statistic,
z = (pcap - p)/sqrt(p*(1-p)/n)
z = (0.0909 - 0.1)/sqrt(0.1*(1-0.1)/88)
z = -0.285