Inferences and mean, median, and mode

Researchers took a sample of the population of pet dogs in Beaver County. Of the 50 dogs sampled, six of them had spots, 45 of them were spayed or neutered, and 25 of them lived in homes with other pets. Write an inference from the survey

• Most dogs have spots

• Dogs like treats

• About half of dog owners own other pets

• Most dogs are sweet

Demetry High School has a student population of 3020. In a sample of 250 students, 170 of them were female athletes. How many students in the entire population should be female athletes?

• 170

• 2700

• 2054

• 320

Jason asked 50 students what there favorite snack was. The results are listed below. Choose ALL of the inferences that can be made from his results.

24- chips 11- candy 4- fruit 11 - ice cream

• Most students prefer fruit over candy

• Almost half of the students prefer chips

• About the same amount of students prefer candy and ice cream

• About 10 % of the students prefer chips

The number is the middle of a set of data is called the....

• mean

• mode

• range

• median

You can have more than one mode?

• True

• False

Find the mean of the set of data :

2, 3, 5, 5, 6, 8, 8

• 37

• 5.3

• 8

• 5

Why are samples useful in studying populations?

Choose all that apply.

• It would take too long to survey every person in the population.

• It would cost too much too much to survey every person in the population

• Because people are lame.

Bobby questioned 2 violinists in the national orchestra.

Is this a random sample of violinists in general?

• Yes it is

• No it is not

Johnathan wanted to know what the most popular pet was. He surveyed 25 dog owners. Was this a random sample?

• Yes

• No

Calculate the mean for:

65, 65, 81, 75, 90, 95

• 78.5

• 72

• 471

• 65