1- true or false. Trend refers to the upward or downward movement that character

Question

1- true or false. Trend refers to the upward or downward movement that characterizes a time series over time ?

2- Which of the following is most likely a population as opposed to a sample?

a) Records randomly selected from afile.

b) Respondents to a national marketing survey.

c) 90 bottles selected from all the ones produced that day.

d) Sales of a new product at 15 test restaurants.

e) All the citizens of a city.

3- If sales for the month of january are 140 units, the seasonality factor is 2.00, and then the deseasonalized sales for january are:

a) 70

b) 80

c) 100

d) 120

Explanation / Answer

1. Trend shows changing data points over time. So yes, it is TRUE

2. Sample includes a data set from a universal set (population) consisting all the data points. So answer is (e) since it is including all the data points. Thus, it is a population.

3. Seasonal demand = (seasonal index)*(deseasonalized demand)

Thus deseasonalized demand = 140 / 2 = 70. Thus answer is (a).

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