TECH SPOT: SAMPLE CRE QUESTIONS (PART 5)

Share This Post

Share on facebook
Share on twitter
Share on email
Share on linkedin

Answers to CRE questions in March 2019 Newsletter

1. X and Y are discrete random variables. The probability that X = 3 is 0.20 and the probability that Y = 4 is 0.30. The probability of observing that X = 3 and Y = 4 concurrently is closest to:
a. 0.06
b. 0.
c. 0.50
d. Cannot answer with the information provided.

2. The probabilities that three students will earn an A on an exam are 0.20, 0.25, and 0.30, respectively. If each student’s performance is independent of that of the other two students, the probability that all three students will earn an A is closest to:
a. 0.0150
b. 0.0075
c. 0.0010
d. 0.7500

3. The following table summarizes the availability of trucks with air bags and bucket seats at a dealership.
What is the probability of randomly selecting a truck with air bags and bucket seats?

a. 0.34
b. 0.57
c. 0.28
d. 0.16

4. The lower limit of a normal distribution is:
a. negative one
b. zero
c. one
d. negative infinity

5. Approximately 50 percent of all observations for a normally distributed random variable fall in the interval:
a. μ ± 2σ
b. μ ± 0.67σ
c. μ ± σ
d. μ ± 3σ

6. A depot receives an average of two engines per day to repair. The probability that they will receive 20 engines in 8 days is:
a. 3.66%
b. 16.56%
c. 6.40%
d. 5.59%

7. The approximate 99% confidence interval for the population mean based on a sample of 60 returns with a mean of 7% and a sample standard deviation of 25% is closest to:
a. 1.546% to 13.454%
b. 0.546% to 13.454%
c. -1.59% to 15.589%
d. 1.584% to 14.584%

8. What is the computed value of the test statistic that follows an F-distribution when sample variances are equal and the level of significance is 0.10?
a. 0.90
b. 0.05
c. 1.00
d. 0.10

9 A survey is taken to determine whether the average starting salaries of Reliability engineers is equal to or greater than $59,000 per year. What is the test statistic given a sample of 135 new Reliability engineers with a mean starting salary of $64,000 and a standard deviation of $5,500?
a. -0.91
b. -10.56
c. 10.56
d. 0.91

10. You have collected monthly returns to depot and want to test the null hypothesis that the standard deviation exceeds the advertised standard deviation of 3.5%. The most appropriate test statistic is based on
a. chi-square test
b. t-test
c. F-test
d. z-test

Picture © B. Poncelet https://bennyponcelet.wordpress.com

More To Explore

General

Reliability and Risk Division Committee has received the Gold award recognition for 2020

We are pleased to announce that the Reliability and Risk Division Committee has received the Gold award recognition for 2020. Measures included in the 2020 award program were: Contributions to ASQ thought leadership, as measured by myASQ content postings Member Engagement and Experience, as measured by myASQ activity and member increases Fiduciary responsibility, as measured

General

ASQ WCQI 2021

ASQ WCQI 2021 conference May 24 -May 28, includes:  Virtual opening session  2 keynote presentations  25 live presentations  70 on-demand presentations  Access to presenters via the WCQI Speakers Lounge  Access to exhibitors and ASQ resources in the WCQI Virtual Expo Hall  Daily peer-to-peer networking and live entertainment  Up to 5.0 RU  Member access to all

Scroll to Top