Biology Forums - Study Force

In a survey, students are asked how many hours they study in a typical week. A five-number summary of the responses is: 2, 9, 14, 20, 60 . Which interval describes the number of hours spent studying in a typical week for about 50 of the students sampled?
 a. 2 to 9
  b. 9 to 14
  c. 9 to 20
  d. 14 to 20

Q. 2

A five-number summary given in Case Study 1.1 for the fastest ever driving speeds reported by 102 women was: 30, 80, 89, 95, 130 . Fill in the blank in the following sentence: Approximately 25 of the women reported a fastest ever driving speed of at most _____ mph.
 a. 30
  b. 80
  c. 89
  d. 95

Q. 3

A five-number summary given in Case Study 1.1 for the fastest ever driving speeds reported by 102 women was: 30, 80, 89, 95, 130 . Fill in the blank in the following sentence: Approximately 25 of the women reported a fastest ever driving speed of at least _____ mph.
 a. 25
  b. 80
  c. 89
  d. 95

Q. 4

A five-number summary given in Case Study 1.1 for the fastest ever driving speeds reported by 102 women was: 30, 80, 89, 95, 130 . What is the interquartile range of these data?
 a. 6
  b. 9
  c. 15
  d. 100

Q. 5

A five-number summary for a data set is 35, 50, 60, 70, 90 . About what percent of the observations are between 35 and 90?
 a. 25
  b. 50
  c. 95
  d. 100

Q. 6

The percent of data which lie between the lower and upper quartiles is
 a. 10.
  b. 25.
  c. 50.
  d. 75.

Q. 7

Which of the following is not a term used for a quantitative variable?
 a. Measurement variable
  b. Numerical variable
  c. Continuous variable
  d. Categorical variable

Q. 8

Which one of the following variables is not categorical?
 a. Age of a person.
  b. Gender of a person: male or female.
  c. Choice on a test item: true or false.
  d. Marital status of a person (single, married, divorced, other)

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Were some really tough homework problems!