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
Describe the differences between the Keynesian closure of the labor market and the classical closure, in particular explain the mechanism of the adjustment of wages and e...Apr 16 2021
o what volume should 22.00 ml of a 6.00 M HCI solution be diluted to prepare a 0.230 M HCI solution?Jun 18 2021
âSincere Stationery Corporation needs to raise â$519,000 to improve its manufacturing plant. It has decided to issue a â$1,000 par value bond with an annual coupon ...Jun 26 2021
For the function, do the following FX) 1-25 (a) Find the critical numbers. (Enter your answers as a comma-separated list) () Use the First Derivative Test to find any loc...Jun 06 2021
The company has the following information about the Common Stock and Preferred StockCS Shares authorized 900,000CS Shares Issued 642,000CS Treasury Shares 22,000PS 8%, 90...Jul 28 2021
Choose the correctly punctuated item. Then compare your responses with the key at the end of the book.a. Many of our potential customers are in Southern California; there...Aug 23 2021
1. What overall changes could you recommend to the executive team at Egan’s about its HR practices? 2. What are the pros and cons of Egan’s performance appraisal system?...Jun 03 2020
Consider the solid that lies above the square (in the xy plane) and below the elliptic paraboloid Using iterated integrals, compute the exact value of the volume.Jun 12 2021
Dabble, Inc. has sales of $973,000 and cost of goods sold of $470,000. The firm had a beginning inventory of $32,500 and an ending inventory of $42,500. What is the le...Apr 24 2021
If you earn 10% per year on your bank account, how long will it take an account with $115 to double to $230?May 28 2018