Instruction this problem must be completed on a sheet of paper separate from the
ID: 3239323 • Letter: I
Question
Instruction this problem must be completed on a sheet of paper separate from the rest of the final exam items write your full name and student top of that page as with AN find exam items work the problem completely, labeling each point and answering all question with fact explanations. Scenario when 3010 adults were surveyed in a poll, 75% said that they use the internet. Answer the following items to determine whether it is okay for a newspaper reporter is write that 3/4 of all adult use the internet. Write the null and alternate hypotheses for this test. What type of test is this (left-tailed, right-tailed or two tailed) Draw a probability distribution describing this test. Be sure to table the axis and use appropriate shading State and interpret the test statistic z state and interpret the p-value Given a 0.06 level of confidence, write a conclusion for the null hypothesis. Explain how you arrived at this conclusion. Give a 0.05 level of confidence, write a conclusion for the alternative hypothesis. Explain how you arrived at this conclusion compose a concluding statement describing whether or not it is okay for the newspaper reporter to write that 3/4 all use the internet.Explanation / Answer
a) null and alternative hypothesis
HO: p is = 0.25
H1: p not= to 0.25
b) its a two tailed test
d)
The test statistic is z = ?. (Round to two decimal places as needed.)
Z=(phat-p)/sqrt(p*(1-p)/n)
=(0.73-0.75)/sqrt(0.75*0.25/3010)
=-2.534
e)
The P-value is ?. (Round to four decimal places as needed.)
It is a two-tailed test.
So the p-value = 2*P(Z<-2.53) =0.0114 (From standard normal table
f)
Identify the conclusion about the null hypothesis and the final conclusion that addresses the original claim. (Assume a 0.05 significance level.)
Since the p-value is less than 0.05, we reject the null hypothesis.
So we can not conclude that it is okay for a newspaper reporter to write that "3 / 4 of all adults use the Internet