The z-score or z-value corresponding to a 95.34% confidence interval is Multiple Choice 1.96 1.65 1.99 1.96 1.65 1.99 1.68 A random sample of size 15 is selected from a normal population. The population standard deviation is unknown. Assume the null hypothesis indicates a two-tailed test and the researcher decided to use the 010 significance level. For what values of t will the null hypothesis not be rejected? O Between 1.282 and 1282 () To the left of -1.345 or to the right of 1.345 O Between -1.761 and 1761 To the left of -1.645 or to the right of 1.645