NARRBEGIN: Science Quiz Scores
Science Quiz Scores
Consider the Hypotheses $\sigma$

Essay

NARRBEGIN: Science Quiz Scores
Science Quiz Scores
Consider the hypotheses H₀: $\sigma$ ² = 20 vs. H₁: $\sigma$ ² > 20. Assume that Science scores on a 25-point quiz for a random sample of 5 students were drawn from a normal population. These were: 18, 16, 10, 13, and 23.NARREND
-The sales manager of a large multinational corporation is concerned that some salespersons perform very well and others quite poorly. To help analyze the problem he draws a random sample of 20 salespersons, determines their commission incomes (in thousands of dollars), and calculates the following statistics: $\bar { x }$ = $37.2, and s = $7.8. Do these statistics provide sufficient evidence at the 5% significance level to conclude that the population variance exceeds $35 million²?