Question 1

Classify the following variables as qualitative, quantitative discrete, or quantitative continuous.

a. Students enrolment in Yorkville University over the recent three years.

b. Length of time of residence in a city

c. Number of siblings

d. Highest education degree obtained

e. What is the difference between qualitative and quantitative graphs? You can explain by providing examples.

Question 2

A very large batch component has arrived at a distributor and 10% of the components in the batch are defective but the distributor does not know the exact percentage of the defective components. He decides to randomly select 10 components and to accept the batch only if the number of defective components in the sample is at most 2.

a. What is the probability that the batch will be accepted?

b. What is the probability that among 10 components, 5 of them are defective?

c. What is the probability that among 10 components, 3 or 4 of them are defective?

Question 3

The wall street journal reported that Walmart store Inc. is planning to lay off 2300 employees at its Sam's Club warehouse unit. Approximately half of the layoffs will be hourly employees. Suppose the following data represents the percentage of hourly employees being laid off for 12 Sam's club the stores:

96, 50, 45, 40, 45, 55, 60, 65, 57, 98, 36, 38

a.Compute the mean and median percentage of hourly employees being laid off at these stores.

b.Compute the first and third quartile.

c.Compute the range and interquartile range.

d.Compute the variance and standard deviation (show your works).

e.Do the data contain any outliers?