INSTURCTION
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1. When considering a job offer, please rank the importance of the following attributes; Salary, Benefits, Vacation time etc. (Please fill in your rank order using numbers 1 through 5 with 1 being the most important).
2. After learning about product OMO, how likely are you to consider purchasing it when next shopping for laundry detergent? Choose from the options: Extremely unlikely 1 - 2 - 3 - 4 - 5 Extremely likely
3. How many hours a day do you spend on a computer? Choose from the options: 0-2 hours/2-4 hours/4-6 hours/more than 6 hours.
4. If one takes a random sample from some population and forms a 96% confidence interval for the population mean ยต, which it is guaranteed to be estimated in the interval formed?
5. Suppose you conduct a significance test for the population proportion and your p-value is 0.184. Given a 0.10 level of significance, which of the following should be your conclusion?
6. Which of the following is a property of the Sampling Distribution of $\bar{x}$
9. If 95% confidence interval for the mean number of televisions per Ghanaian household is (1.15, 4.20), then the probability that $\mu$ is between 1.15 and 4.20 is 0.95.
8. If 95% confidence interval for the mean number of televisions per Ghanaian household is (1.15, 4.20), then we are 95% confident that the true mean number of televisions per American household is between 1.15 and 4.20.
9. Suppose our p-value is .044. What will our conclusion be at alpha levels of.10,.05, and .01?
10. is two-dimensional chart showing time on the horizontal axis and the variable of interest on the vertical axis.
Use the following information to answer questions Q11 to Q13.
The bivariate joint frequency distributions are often presented as two-way
contingency table with marginal frequencies.
| | Swimmers | Tennis | Volley | Total |
| Men | 2 | 10 | 8 | 20 |
| Women | 16 | 6 | 8 | 30 |
| Total | 18 | 16 | 16 | 50 |
11. From the table above, compute the joint total relative frequency of
women.
12. Compute the joint total relative frequency of Swimmers given the table above.
13. Find the joint relative frequency of men in Volley.
Use the following information to answer questions Q14 and Q15.
Using the exam marks 9, 9,9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, and 5,
find:
14. The variance.
Use the following information to answer questions Q16 and Q17.
If a random sample of 100 people shows that 25 are left-handed, then
given z = 1.96 for 95% confidence level,
16. Compute the standard error for the population proportion.
17. Estimate the Confidence Interval for the true proportion of left-handers
18. .......... is the probability of failing to reject a null hypothesis when in actual case it is false.
19. Situation where the null hypothesis is true and it is failed to be rejected then ........ is committed.
20. The number of calls coming per minute into a hotels reservation center is Poison random variable with mean 3. Find the probability that no calls come in a given 1 minute period.
