Based
based on the z-statistic of -2.5 for the sample
data, should the null hypothesis be rejected?
a) yes, because the z-statistic lies within the
critical region.
b) yes, because the z-statistic lies outside of the
critical region.
c) no, because the z-statistic lies within the
critical region.
d) no, because the z-statistic lies outside of the
critical region.

What numbers are included in the set of integers? what numbers are not included?

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)