Statistics and Probability Answers

The number of inquiries received by a school on administration each day are recorded as: 40, 43, 49, 45, 46, 42, 43. Find the variance in the inquires per day

A researcher wanted to determine whether the average intelligence score for prisoners was different from the average intelligence score for the general population (μ = 100, σ = 15). Thirty-six prisoners on death row were administered an IQ test; the average IQ of the prisoners was 93. Use 0.05 significant level to test the null hypothesis.

Groups of two's are selected from a group of four represented by the A, B, C, D. Which of the following represent the sample space

In a given normal distribution, the population mean is 80 and the population standard deviation is 2.5. Find the corresponding z-score of the following values:

15. 84

If Z has a standard normal distribution, and P (0 < Z < z ) is 0.3770, then the

value of z is

Sample space of rolling a die