True/False

1. (True / False)Estimating parameters and testing hypotheses are two important aspects of descriptive statistics. My Answer: TRUE

2. (True / False)A statistic is calculated from a sample and a parameter is calculated from a population.My Answer: TRUE

3. (True / False)Descriptive statistics include visual display of data, measures of central tendency, and measures of dispersion. My Answer: FALSE

4. What type of data (attribute, discrete numerical, continuous numerical) is each of the following variables:

1. ___Attribute____________Your college major

1. _____Continuous Numerical__________Your GPA

1. ___Discrete Numerical____________The number of peanuts in a jar

1. _____Continuous Numerical__________The distance between Denver and Los Angeles

5.Which type of data (nominal, ordinal, interval, ratio) is each of the following variables?

1. _____Nominal__________Your zip code

1. ___Interval____________Temperature in degrees Fahrenheit

1. ______Ordinal_________The following rating scale: (1 = Bad, 2 = Better, 3 = Good)

1. ________Ratio_______Miles per hour

6. 1,000 names are selected from a phone book containing 50,000 people by choosing every 50^th name.Which sampling method is this?

A)Simple random sample.

B)Systematic sample. My Answer

C)Stratified sample.

D)Cluster sample.

7. From its 32 regions, the F.A.A.selects 6 regions, and then randomly audits 25 departing commercial flights in each region for compliance with legal fuel and weight requirements.This is an example of

A)simple random sampling.

B)stratified random sampling.

C)cluster sampling. My Answer.

D)judgment sampling.

8. Suppose we want to estimate vaccination rates among employees in state government, and we know that our target population is 55 percent male and 45 percent female.Our budget only allows a sample size of 200.We randomly sample 110 males and 90 females.This is an example of

A)simple random sampling.

B)stratified random sampling. My answer.

C)cluster sampling.

D)judgment sampling.

I filled these out, but I would appreciate someone to check my answers. If I made a mistake, could you please explain as to why in detail? Thank you.