The frequency distribution shows the results of 200 test scores. Are the test scores normally distributed? Use (alpha) α = 0.05 Complete parts (a) through (d).
Class Boundaries, Frequency f.
49.5 - 58.5, 20.
58.5 - 67.5, 60.
67.5 - 76.5, 80.
76.5 - 85.5, 35.
85.5 - 94.5, 5.
Using a chi-square goodness-of-fit test, you can decide, with some degree of certainty, whether a variable is normally distributed. In all chi-square tests for normality, the null and alternative hypotheses are as follows.
H0: The test scores have a normal distribution.
Ha: The test scores do not have a normal distribution.
a. Find the expected frequencies?.
b. Determine the critical value, χ20, and the rejection region?.
c. Calculate the test statistic.
d. Decide whether to reject or fail to reject the null hypothesis. Then interpret the decision in the context of the original claim
Which of the following statements is true regarding variance analysis in the modern manufacturing environment? A. It requires all variances, regardless of size, to be i...Jan 09 2020
What are the three conditions according to Donald Cressey for fraudto occur?Jun 08 2021
1. Why do researchers want the error variance in their data to be small?2. Why do researchers use meta-analysis?May 13 2020
Computing Service-Hours DepreciationThe company acquired a machine on January 1 at an original cost of $60,000. The machine’s estimated residual value is $10,000, and its...Jun 16 2020
Share Repurchase. In the previous problem, suppose the company has announced it is going to repurchase $31,050 worth of stock instead of paying a dividend. What effect wi...May 25 2020
In using percent of sales method of financial planning, it is assumed that all items including working capital items are expected to vary with sales at the same percentag...Jun 30 2021
Explain the benefits principle and the ability-to-pay principle. What are vertical equity and horizontal equity? Why is studying tax incidence important for determining t...May 12 2021
Giselle currently works a manual labor job stocking inventory and plants at a native plants nursery. Giselle is very good in working with customers who ask her questions...Dec 13 2019
3 x' х 1 - 1 Solve x(0) 2 Question 2. Solve the IVP. est - 2e2t - 11t-6 x(t) = -2e3t+2e2t + 7t + 5 5-t x(t) = 2+t 5+2t 2+t -e3t+2e2t - 12t-71 x(t) = 2e3t - 2e2t + + 6 + ...May 13 2021
On January 1, Barton Co. purchased land with a usable building on it for $425,000. At the time of purchase, the fair market values of the land and building were $170,000 ...Jan 25 2020