Samples and Percent

A sample is taken of 200 people. The number of people who own a dog was 80.
What is the sample proportion?

• 80

• 0.8

• 0.4

• 35%

30% of all dogs in a city are micro-chipped. In a sample of 500 dogs, what is the probability that less than 140 dogs are micro-chipped? Select the closest option.

• 0.25

• 0.21

• 0.17

• 0.13

Suppose we have a population that is 49% male.  If we take a random sample from that population and determine the percent of our sample that is male, we refer to this proportion as...

• p

• p-hat
  

• the sample mean

• the sampling distribution

It is said that 60% of families own a pet. Of a sample of 95 families, 70 owned pets. Perform a hypothesis test to determine whether the percent of families who own pets is different than 60%. Use a α=0.01 level of significance.

• Z Test

• T Test

• 1-Prop Z Test

• X² Test

• Reject the Null

• Fail to Reject the Null

• Accept the Null

• There is enough evidence to reject the claim that the percent of families who own pets is different than 60%

• There is not enough evidence to support the claim that the percent of families who own pets is 60%

• There is enough evidence to support the claim that the percent of families who own pets is different than 60%

• There is not enough evidence to support the claim that the percent of families who own pets is different than 60%