Question

Question 1:

a. What does correlation measure?

• It measures the midpoint of two center values.
• it measures the difference between two variables of interest.
• It measures the degree of association between variables.
• It measures the midpoint of a range.

b. What type of time series data pattern contains a long-term change in the level of data?

• Seasonal
• Irregular
• Cyclical
• Trend

c. Autocorrelation is the evaluation of __________ observations of a time series of data over time.

• successive
• consequent
• parallel
• frequent

d. Which one of the following correctly explains the differences between mean, median, and mode?

• The mean is an average of a set of numbers, the median is the number in the set that appears most frequently, and the mode is the middle number in a set of numbers.
• The mean is the middle number in a set of numbers, the median is the average in a set of numbers, and the mode is the number in the set that appears most frequently.
• The mean is an average of a set of numbers, the median is the middle number in a set of numbers, and the mode is the number in the set that appears most frequently.
• The mean is the number in the set that appears most frequently, the median is the middle number in a set of numbers, and the mode is an average of a set of numbers.

Answer 1

a. It measures the degree of association between variables
(Correlation measures the degree of association.)

b. Trend
(This tie series data shows long term changes.)

c. successive
(Autocorrleation analyses successive observations.)

d. The mean is an average of a set of numbers, the median is the middle number in a set of numbers, and the mode is the number in the set that appears most frequently.
(Means means average, median means middle number, and mode means most frequently occuring number.)