Statistics Summative Bonus Point Quizizz

A (a)   is a part of the larger group that is chosen to represent the whole.

• sample
• population
• bias
• census

The ​ (a)   refers to the entire group of people, objects, or items.

• population
• sample
• inference
• bias

Determine the type of sampling method used to gather data for the scenario below:

Corey took a survey of every 15th student who entered the school to determine the subject they found most challenging.

• Convenience Sample

• Simple Random Sample

• Systematic Random Sample

• Voluntary Response Sample

Mrs. Welborn wants to know the average reading level of students at Durham Middle School. To save time and energy, she asks the students she teaches. She determines that the average reading level of a student at Durham Middle is an 835.

Are Mrs. Welborn's findings valid or invalid?

• Valid since she gathered the sample randomly.

• Invalid since her sample was a convenience sample and contains bias.

• Invalid since the sample was representative and did not contain bias.

• Valid since the sample does not contain bias.

What percent of the data values are greater than 5?

• 75

• 25

• 50

• 100

What is the interquartile range of the data set?

• 25

• 7.5

• 10

• 20

Which has a higher median?

• Florida

• Texas

Find the median of the data set:

35, 41, 19, 27, 30

Find the mean of the data set:

35, 41, 19, 27, 30

The dot plots compare the number of raffle tickets sold by boys and girls during a school fund-raiser.

The maximum number of raffle tickets sold by a boy is ​ (a)   the maximum number of raffle tickets sold by a girl.

• equal to
• greater than
• less than