Question

8.2.5 Question Help A certain drug is used to treat asthma. In a clinical trial of the drug, 20 of 273 treated subjects expenenced headaches (based on data from the manufacturer) The accompanying calculator display shows results from a test of the claim that less than 10% of treated subjects experienced headaches. Use the normal distribution as an approximation to the binomial distribution and assume a 0.05 significance level to complete parts (a) through (e) below 1-Prop Deat prop<0.1 2--1.472720329 p=0.0704132313 b. What is the test statistic? 2 (Round to two decimal places as needed.) VI s. (, More Enter your answer in the answer box and then click Check Answer 4 Clear All Check Answer parts remaining Links O - BE Type here to search

I got a. but I need help with b, c, and d please.
b. what is the test statistic?
c. Find the P value
d. what is the null hypothesis and what do you conclude about it?

Answer 1

b)

from given output:

test statistic z = -1.47

c)

p value =0.0704 (please try 0.070 if required to 3 decimals)

d)

null hypothesis: p>=0.10

since p value is greater than 0.05 level, we fail to reject Ho, we can not conclude that proportion is less than 0.1