OSCAR THE TUTOR
oscardiura@gmail.com
+27737560989
N . for FAC MAC ECS DSC TAX QMI FIN
Time left 25:22:25 INV BNU STA tutorials
Question 1
Answer saved
Marked out of 4.00
Assume that a mean length of a working week for a population of workers has
been previously reported as 39.2 hours with a population standard deviation of
4.8. Suppose a current sample of 112 workers provides a sample mean of 38.5
hours. The analyst wants to test the following hypotheses:
The null hypothesis Ho: | = 39.2 against the alternative hypothesis Hy: p %
39.2.
The pvalue is
Select one:
@® 1. 0.0668.
O 2. 0.1236.
O3 07
O 4. 0.4536.
O 5. 0.0618.
Clear
my choice
,Sales personnel for a supermarket submit weekly reports listing the customers contacts made during the
week. A sample of 66 weekly reports showed a mean of 19.5 and a sample standard deviation of 5.2
customer contacts per week. The 99% confidence interval for the population mean number of the weekly
customer contacts is
Select one:
O 1. (19.5; 1.6988).
O 2. (1.677; 4.873).
® 3. (17.8012 21.1988).
O 4 (2083 4.2169).
O 5. (18.2455; 20.7545).
,A researcher wants to use the linear regression to determine whether there is a relationship between X and
Y using the data below:
The coefficient of correlation is
Select one:
® 1. 0.6606.
O 2. 03198,
O 3. 0.0660.
O 4 075
O 5 0.6073.
The following data represent the hourly wage rates (rand per hour) for
10 employees of a company:
‘22‘24 17‘21‘18‘16‘19 21‘20‘22‘
Which one of the following statements is incorrect?
Select one:
@ 1. The value that represents the first quartile Q; (or the percentile Pys) is
17.75.
O 2. The value that represents the second quartile Q, (or percentile Pso) is
20.5.
O 3. The position of the first quartile Q; (or the percentile Pys) is 2.75.
O 4. Theinterquartile range is 4.
O 5. The variance of wage rates is 6.2222.
Clear
my choice
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller oscardiura. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R93,33. You're not tied to anything after your purchase.
