7.SP Review

Which measure of central tendency best describes the situation. The salaries of 7 employees who work for the same company: $76, $94, $88, $256, $90, $95 and $92

• mean

• median

• mode

• none

Which measure of central tendency(ies) best describes the situation. The ages of 7 people who auditioned for a role in a play: 17, 20, 22, 12, 15, 12, 21.

• mean

• median

• mode

• mean and median

Martha is planning to survey people at a water park to determine the most popular water slide at the park. Which would be the best sample for her to survey to draw a valid conclusion?

• children at the park ages 3–5

• adults and children of all ages at the park

• children at the park ages 6 –10

• adults at the park ages 20–30

In a box-and-whisker plot that displays the number of visitors to the state parks in each of the 50 states in 2010, how many states would fall between the lower extreme and the median?

• 50

• 12.5

• 25

• 37.5

Find the unknown number in the data set: 32, 18, 16, a, 23, 41 when the mean=28.

• a= 168

• a= 130

• a= 38

• a= 26.333...

The manager of a bagel shop wants to add some new flavors that will appeal to his customers. Which survey method is most likely to produce a representative sample of the bagel shop’s customers?

• surveying any customer who is over the age of 20

• surveying every fifth customer who enters the bagel shop

• surveying all men and women between the ages of 18 and 20

• surveying every fifth female customer who enters the bagel shop

A neighborhood has 250 families. Natalie randomly selects 20 families to survey about recycling. Of the 20 families she surveyed, 18 of them recycle. About how many families in her neighborhood recycle?

Sophia counts the number of people in one sections of the school auditorium. She counts 18 female students, 16 male students, and 6 teachers. There are 720 people in the auditorium. Consider the probability of selecting one person at random for the auditorium. Which statement is true?

• P(teacher)=6%

• P(student)=85%

• P(female student)=36%

• P(male student)=32%

At a restaurant, a children’s meal gives a choice of four entrees: burger (B), chicken (C), pizza (P), or spaghetti (S), and two sides: apple (A) or fries (F). Which sample space represents all the ways a child could choose one entrée and one side for his or her meal?

• BA, BF, CA, CF, PA, PF, SA, SF

• BA, CA, PA, SA

• BF, CF, PF, SF

• B, C, P, S, A, F

At a restaurant, a children’s meal gives a choice of four entrees: burger (B), chicken (C), pizza (P), or spaghetti (S), and two sides: apple (A) or fries (F). The restaurant decided to add another choice for the entrée and another choice for the side on the children’s menu. The additional entrée choice is grilled cheese (G) and the additional side choice is mixed vegetables (M). What is the probability that a child will choose pizza or spaghetti with mixed vegetables for his or her meal? Write your answer as a fraction.