Question

Chapter 09, Section 9.2, Problem 020a A andom sa le o 102 observations produced a sample mean Ilo: μ = 28 versus Ih: μ 28. Raund your answers to two decimal places 29. Find the critical and observed values of for the following test of hypothesis using α 5. The population standard deviation is know n to be 5 and the population distribution is no al eic Ecritical right Zebserved- Question Attempts: 0 of 2 used SAVE FOR LATER SUMIT ANDWER Maplehlet

Answer 1

null hypothesis:Ho Alternate Hypothesis:Ha 28 28 for 0.05 level with two tailed test, critical value of z Decision rule 1.960 reject Ho if absolute value of test statistic z >1.96 population mean sample mean sample size population std deviation 28 29 102 μέ 邨: standard errror of means σ,-σ//ns 0.4951 test statistic z-(x-μ)/σ,- 2.02

from above:

Z_{critical left} =-1.96

Z_{critical right} =1.96

Z_observed =2.02