Question

In: Math

Use the following information to answer the first 5 questions: Suppose we wanted to estimate the...

Use the following information to answer the first 5 questions:

Suppose we wanted to estimate the average age of a certain group of divorced men during 1988 and took a random sample of (n = ) 100 giving us x =35.2 years old.

  1. this is the symbol that represents the average age of the population
  2. this is the amount of people in the sample
  3. this is the average age found from our sample
  4. this is the symbol we use to represent the average age of the sample
  5. this is the population

Answer choices

(a) 35.2 (b) 100

(c) m (d) x

(e) the average age of a certain group of divorced men during 1988

Suppose we wanted to estimate the average age of a certain group of divorced men during 1988 and took a random sample of n = 7 and received the following ages: 37, 22, 31, 43, 39, 61, and 26.

          

6) Calculate . You can use a Google Spreadsheet if you’d like since you should know by now how to calculate averages this way. We will learn another way soon (which most of you know at this time from previous courses).

x = 37 years old Answer choices: (a) True (b) False

Use the following information to answer the next three questions and choose the best answer::

To determine the average height of Cornell University males, two Sociology students sampled 50 males, yielding an average height of 5’10”.

7) What is the population parameter of interest?

(a) two Sociology students

(b) 50 males

(c) the average height of Cornell University males

8) What is the sample?

(a) two Sociology students

(b) 50 males

(c) the average height of Cornell University males

9) What symbol would we use to represent the average height of 5’10” ?

(a) n

(b) x

(c) m

Decide if the following statements are descriptive or inferential.

10) About 85% of women in the US have a job.  

11) The mean grade on the MA 161 final given last semester was an 83.

12) Drinking bubble tea can raise cholesterol levels by 10%.  

Answer choices: (a) Descriptive (b) Inferential

Decide if the following statements are quantitative or categorical (if categorical whether they are binary)

13) The age of a groom on his wedding day.

14) Whether a spun penny lands on heads or tails.

Answer choices:

(a) Quantitative

(b) Categorical - not binary    

(c) Categorical - binary

15) Any x found is a parameter Answer choices: (a) True (b) False

Solutions

Expert Solution

Answer: this is the symbol we use to represent the average age of the sample

6)

Answer choices: (a) True

7)

Population parameter

Answer: (c) the average height of Cornell University males

Explanation: Population represents all Cornell University males.

8)

Sample

Answer: (a) two Sociology students

Explanation: Sample represents the number of observations drawn from the population

9)

Symbol for average height of 5’10”

Answer: (b) x

10)

Answer: inferential

Explanation: Inferential statistic gives some useful information about the population.

11)

Answer: descriptive

Explanation: Descriptive statistic provides the description of the data

12)

Answer: inferential

13)

Answer: quantitative

Explanation: Age is a countable data hence age is quantitative

14)

Answer: (c) Categorical - binary

Explanation: Since there is only two outcome, this is a categorical variable with 2 categories (binary)

15)

Answer choices: (a) True

milcah answered 1 year ago
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