Quiz 3

Question 0

Cheshire High School announces the results of a survey 61 percent of the senior class has an iphone. They survey was given to a random sample of 100 seniors.What is the population?

Answer 0

The senior class

Question 1

A number that describes the population is?

Answer 1

parameter

Question 2

A good sampling method is?

Answer 2

small bias and small variability

Question 3

By increasing the size of a sample, we can:

Answer 3

reduce variability

Question 4

To reduce bias, one needs to

Answer 4

use random sample

Question 5

Fill in the blank: Larger samples… than smaller samples.

Answer 5

have less variability

Question 6

The conclusion of a confidence statement always applies to:

Answer 6

the parameter if a population

Question 7

If no level of confidence is given in a confidence statement then:

Answer 7

It is assumed that the level of confidence is 95 percent

Question 8

If you want a smaller margin of error with the same confidence

Answer 8

increase sample size

Question 9

True or false: the size of the population determines the variability of the statistic from a random sample:

Answer 9

False. variability of a sample statistic depends on the size of the sample and not on the size of the population