Question 43 5 pts The approximate standard error of the sample mean is calculated as Question 45 5 pts In an effort to understand the true mean price of tablets, | surveyed 50 stores. The average price of a tablet was found to be $375 with a standard deviation of $20. If I develop a 95% and 99% condence interval estimate, what would these two Cl estimates have in common? Both use the same z-critical value. Both use the same t-critical value. Both use the same condence level. Both use the same point estimate. Question 48 5 pts The form of the alternative hypothesis can be O one-tailed only. O two-tailed only. O neither one nor two-tailed. O one-tailed or two-tailed