Prob and Stats Review

A school newspaper published an article that said approximately 55% of the school’s population enjoys Friday night Football games. The survey was given to a student-athlete club. Which statement is true?

• The findings in the article are valid because the population represents the feelings of a club.

• The findings in the article are accurate because the whole population was surveyed.

• The findings in the article are not valid because only student-athletes were surveyed.

• The findings in the article are not valid because 55% of the students were not surveyed.

Determine if the following represents a statistic or a parameter: Median Price of a home in Murfreesboro.

• Statistic

• Parameter

Determine if the following represents a statistic or a parameter: The average height of high school basketball players surveyed.

• Statistic

• Parameter

Determine if the following represents a statistic or a parameter: Most popular pizza topping of students in Mrs. G’s class.

• Statistic

• Parameter

Determine if the following represents a statistic or a parameter: The shoe size of 15 boys in Ms. Curtis’ class.

• Statistic

• Parameter

Which statistical method involves testing different assumptions under controlled conditions?

• Experiment

• Observational study

• Questionnaire

• Survey

Jorge measures his bedroom and rounds the measurements to be 20 ft. by 14 ft. What would be the maximum area of his bedroom and how much carpet should he purchase to carpet the room?

• 20 x 14; 280 square feet

• 19.5 x 13.5; 263.25 square feet

• 20.5 x 14.5; 297.25 square feet

• 20.4 x 14.4; 293.76 square feet

Which method would be the best way to conduct an observational study to determine the effects of Vitamin C for preventing colds?

• Ask 100 people who consume Vitamin C if they got a cold.

• Divide 100 volunteers into two groups. Give one group Vitamin C and do not give the other group Vitamin C. Monitor who gets a cold.

• Interview 100 people and classify them as either never consuming Vitamin C, sometimes consuming Vitamin C, or consuming Vitamin C on a regular basis. Check for cold symptoms and analyze the results.

• Ask 100 people who had a cold last winter if they consumed Vitamin C on a regular basis and record the number.

Which statement best describes why River’s data is misleading?

• The population sample is not guaranteed to be in his class.

• It doesn’t give the percentage for each color.

• It does not identify the age of the students surveyed.

• The entire school population is not represented in the survey.

Consumers who bought Dove were asked to respond to an internet survey comparing Dove to Olay. If 500 of the 700 people said they preferred Dove, what claim can the company make?

• 5 out of 7 people prefer Dove.

• More people use Dove than Olay.

• Any claim would not be accurate since the survey was given to Dove consumers.

• Any claim would not be accurate since it is likely that most respondents use Olay.