Author Question: A survey claims that 9 out of 10 doctors recommend aspirin for their patients with headaches. To ... (Read 94 times)

mia · **on:** Jun 24, 2018

A survey claims that 9 out of 10 doctors recommend aspirin for their patients with headaches. To test this claim against the alternative that the actual proportion of doctors who recommend aspirin is less than 0.90, a random sample of 100 doctors' results in 83 who indicate that they recommend aspirin. The value of the test statistic in this problem is approximately equal to:
a. -1.67
b. -2.33
c. -1.86
d. -0.14

Question 2

The Spearman correlation coefficient is calculated using the ranks of the data, rather than the values of the data themselves.
Indicate whether the statement is true or false