Question

Identify if population parament or sample statistic:

Is statement population parameter or sample statistic? If, parameter, then identify population and parameter. If sample, then, what is population, sample, and statistic?

A) North Carolina State’s rugby team scored an average of 29.8 points per game in the 2015 season.

B) Based on a new poll of 5000 citizens, they believe that 89% of voters plan to cast their ballot for Mayor Green in the upcoming election.

C) A calculating fanatic conducts an experiment using 46 secretaries to see if there was an increase in typing speed and efficiency when changing from the QWERTY keyboard to the Dvorak keyboard. He found that the participants could type an average of 22.5 words per minute faster using the Dvorak keyboard.

D) A small business owner looks at his records from the past five years and determines that the average monthly cost of running his business is $5900.

2. Following, what level of measurement is used to measure variable? Identify if quantitative or categorical? If quantitative, identify if it is discrete or continuous?

A) How many cars have the persons owned over their lifetime?

B) Is the person dent right or left-handed?

C) What is the person's year of birth?

D) On a scale from 1 to 5, for 1 being not at satisfied and 5 being completely satisfied with the food, to what extent do you agree with the following statement – “I love math!”?

Answer 1

2. Following, what level of measurement is used to measure variable? Identify if quantitative or categorical? If quantitative, identify if it is discrete or continuous?

A) How many cars have the persons owned over their lifetime?

The number of cars that PERSON can own is a quatatitative value , it has to be discrete as we cant have cars in decimal numbers (continous)

B) Is the person dent right or left-handed?

This is whether the dent is right handed or left handed , thus it can a categorical variable as it can take only 2 values - left or right

C) What is the person's year of birth?

year of birth are quantitative numbers , they cant be decimal numbers. they can only take values such as 1996 , 1983 etc

D) On a scale from 1 to 5, for 1 being not at satisfied and 5 being completely satisfied with the food, to what extent do you agree with the following statement – “I love math!”?

as the scale are numeric in nature but they can only take 5 values , thus we can treat them as categorical variable where the category can take only 5 unique values - 1 2 3 4 5

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