(a) To test Upper H0?: μ=100 versus Upper H1?:μ ≠n?100, a simple random sample size of n=21 is obtained from a population that is known to be normally distributed.
??Overbarx=105.2 and s=8.38.3?, t=: 2.8712
?(b) If the researcher decides to test this hypothesis at the α=0.01 level of? significance, determine the critical values.
The critical values are____ ?(Round to three decimal places as? needed.)