Reference no: EM132245861

Question 1

Please refer "correlations coefficient" data sheet. A retail store manager wants to identify what products can be and cannot be displayed together in the store. The data shows the sales volume of each product over the past 41 days. Sales increase in one product could be associated with the sales decrease in another product. The manager wants to avoid this situation. Can you tell which are the product pairs should NOT be displayed together, judging from the magnitude of the coefficient? (hint: direction is already implied. Pick the one has the greatest magnitude in that direction)

A) It does not offer enough information
B) Product A and C
C) Product A and B
D) Product B and C

Question 2

Please refer "correlations coefficient" data sheet. A retail store manager wants to identify what products can be and cannot be displayed together in the store. The data shows the sales volume of each product over the past 41 days. Sales increase in one product could be associated with the sales increase in another product. The manager wants to promote this situation. Can you tell which are the product pairs should be displayed together, judging from the magnitude of the coefficient? (hint: direction is already implied. Pick the one has the greatest magnitude in that direction)

A) It does not offer enough information
B) Product A and C
C) Product A and B
D) Product B and C

Question 3

Please refer "firm performance" data sheet. What is the most useful measure of variability in this case?

A) Coefficient of dispersion
B) Standard error
C) Coefficient of variation
D) Variance
E) Standard deviation

Question 4

Please refer "firm performance" data sheet. Which firm has the least level of fluctuation in its performance? (hint: the choice of a right measurement is the critical part here.)

A) Firm A
B) Firm B
C) Firm C
D) Firm A and C are the same
E) It does not offer enough information

Question 5

Please refer "sampling" data sheet. A supplier has sent a shipment contains 1000 items. Please use following specifications to construct a frequency table (or Count of Shipment).
- Starting at: 200
- Ending at: 500
- By: 25
Please answer based on the table. If you randomly draw a sample, mostly likely, the sample will be coming from which following groups?

A) 325-350
B) 375-400
C) Chance does not favor a particular group
D) 350-375
E) 300-325

Question 6

Please refer "sampling" data sheet. The general rule to test a claim to see whether it is true, is to find out whether it has a very small chance of occurring. In other words, if assuming the claim is true, the result of sampling should not be a rare result.

In this case, the supplier claims that the weight of its product will not be less than 343.5 oz.
Column C is the sample I have drawn to test the claim. Column E and F contain descriptive information regarding the sampling result.
Use an appropriate Excel formula to find out what is the probability of obtaining this particular sampling result?

(hint: (1) if the claim is true, a random sample should also have a sample average that is somewhat similar to what the supplier is claiming; (2) In this case, mean value is 343.5, and standard deviation is 6.80, determine what is the value of X by yourself.)

A) .5072
B) .4928
C) .3478
D) .4606

Attachment:- Data.rar