Consider the following sample data with mean and standard deviation of 17.0 and
ID: 3437301 • Letter: C
Question
Consider the following sample data with mean and standard deviation of 17.0 and 7.4, respectively.
A. Calculate the value of the test statistic. (Round the intermediate z and expected values to 2 decimal places and probability values to 4 decimal places. Do not round any other intermediate calculations. Round your answer to 2 decimal places.)
B. At the 1.0% significance level, what is the decision rule? (Round your answer to 3 decimal places.)
A. Calculate the value of the test statistic. (Round the intermediate z and expected values to 2 decimal places and probability values to 4 decimal places. Do not round any other intermediate calculations. Round your answer to 2 decimal places.)
B. At the 1.0% significance level, what is the decision rule? (Round your answer to 3 decimal places.)
Explanation / Answer
A.The value of z test statistic is:
z=(mean-mu)/(sigma/root over n)
substitute the respective values to get the z value.
B.At 1% level of significance the the critical values are plus minus 2.58. That is reject the null hypothesis if z<-2.58 or z>+2.58.