Quiz 2 (Week 3) Describing distributions PDF

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SCI1020 - Introduction to Statistical Reasoning - S2 2019 Dashboard /

/ SCI1020 - S2 2019 / Weekly Quiz On-line / Quiz 2 (We

Question 1

Which of the following statements best describes what a histogram shows? Select one: a. The data values from minimum to maximum. b. The five number summary of the data. c. The amount of data overall. d. The frequency of data within set intervals of value.

Question 3

The following histogram represents the distribution of acceptance rates (percent each class interval, the left endpoint is included but not the right, so the class inte

Reference: Ref 1-4

What is the approximate shape of this distribution? Select one: a. uniform. b. skewed to right. c. skewed to left. d. bell-shaped symmetrical.

Question 4

In a statistics class with 136 students, the professor records how much money ea

Question 5

The five-number summary of a set of data Select one: a. is the minimum, first quartile, median, third quartile and the maximum. b. is the mean, standard deviation, first quartile, median, and third quartile. c. is the mean, median, mode, variance, and standard deviation. d. is the minimum, the standard deviation, the mean, the median, and the m

Question 6

The five-number summary of the ages of 18 faculty members in a university math (32, 39, 47.5, 58, 68) The first quartile of the age of the faculty members at this university is Select one: a. 38 years. b. 39 years. c. 38.5 years. d. 40 years.

Question 7

The following is a boxplot made from the verbal scores of applicants in an entran

Reference: Ref 2-3

Based on this boxplot, which of the following statements is true? Select one: a. The distribution of verbal GRE scores is fairly symmetric. b. About half the students scored over 500. c. Nobody scored an 800. d. All of the above.

Question 8

Question 9

A Normal density curve (or distribution) has which of the following properties? Select one: a. It has a symmetric bell shape. b. It has a peak centred above its mean. c. The spread of the curve is proportional to the standard deviation. d. All of the above.

Question 10

The time to complete a standardized exam is approximately Normal with a mean minutes. How much time should be given to complete the exam so 84% of the students wi Select one: a. 95 minutes b. 90 minutes c. 68 minutes d. 80 minutes...