Statistical Quiz

What is the median for this data set? Remember to list all of the data in order from least to greatest. Then find the median which is the middle number in this ranked set of data.

• 4

• 3

• 1

• 0

How many people have 3 or more pets?

• 3

• 5

• 2

• 6

Rank the data in order from least to greatest.

• 0, 0, 0, 1, 1, 1, 1, 2, 3

• 0, 0, 0, 1, 1, 1, 2, 2, 3

• 0, 0, 0, 1, 1, 1, 2, 3, 3

• 0, 0, 0, 0, 1, 1, 1, 2, 3

A school principal wants to see which subject the 695 students in his school liked best. Which choice BEST represents a representative sample?

• The girls in the school.

• 1 classroom for each grade

• All the students in the school.

• The students making a B in math.

The entire group studied.

• sample

• population

Choose all shapes that apply to the distribution shown.

• Bell-Shaped

• Uniform

• Skewed Left

• Symmetric

• Skewed Right

Choose all shapes that apply to the distribution shown.

• Bell-Shaped

• Bimodal

• Skewed Right

• Uniform

• Skewed Left

Choose all shapes that apply to the distribution shown.

• Uniform

• Skewed Right

• Symmetric

• Bimodal

• Skewed Left

A pizza company is interested in the average number of pizzas eaten each year by people. They send out 30 volunteers to conduct research by collecting random samples of 25 people each and determine the number of pizzas that the people in the group ate in the previous year. After looking at the sample means, the company sees that the distribution is approximately normal, with a mean of 6.4 pizzas eaten and a standard deviation of 0.6 pizzas. Label the normal curve to show 3 standard deviations from the mean.

Based the normal curve on the previous slide, estimate the proportion of people who ate between 5.8 and 7 pizzas last year.