A random sample of 49 statistics examinations was taken. The average score, in the sample, was 84 with a variance of 12.25 . The 95% confidence interval for the average examination score of the population of the examinations is
a. 80.48 to 87.52.
b. 77.40 to 86.60.
c. 82.99 to 85.01.
d. 68.00 to 100.00.
c
You might also like to view...
A presentation that seeks to reinforce the audience’s attitude about a topic is a(n) ______ presentation.
a. informal b. epideictic c. informative d. persuasive
Widgeon Co manufactures three products: Bales; Tales; and Wales. The selling prices are: $55; $78; and $32, respectively. The variable costs for each product are: $20; $50; and $15, respectively. Each product must go through the same processing in a machine that is limited to 2,000 hours per month. Bales take 7 hours to process, Tales take 4 hours, and Wales take 1 hour. What is the contribution
margin per machine hour for Tales? A) $7 B) $5 C) $28 D) $35
Securities issued in a private placement are called __________ securities
a. qualified b. private c. restricted d. shelf
Roggenok, a textile company, owns 15 factories that produce clothing materials. The company has 1500 employees working in shifts. In this scenario, the factories owned by Roggenok can be classified as _____.
A. equity B. human resources C. capital D. natural resources