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Chapter 1: Q. 71 (page 49)
You look at real estate ads for
The answer is number (c) skewed to the right.
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The histogram below shows the distribution of the percent of women aged and over who have never married in each of the states and the District of Columbia.
The leftmost bar in the histogram covers percent of never-married women ranging from about
(a)
(d)
(b)
(e) None of these.
(c)
Forty students took a statistics examination having a maximum of 50 points. The score distribution is given in the following stem-and-leaf plot:
The third quartile of the score distribution is equal to (a) 45. (b) 44. (c) 43. (d) 32. (e) 23.
El Niño and the monsoon It appears that El Niño, the periodic warming of the Pacific Ocean west of South America, affects the monsoon rains that are essential for agriculture in India. Here are the monsoon rains (in millimeters) for the strong El Niño years between and
(a) To make a stem plot of these rainfall amounts, round the data to the nearest 10, so that stems are hundreds of millimeters and leaves are tens of millimeters. Make two stem plots, with and without splitting
the stems. Which plot do you prefer?
(b) Describe the shape, center, and spread of the distribution.
(c) The average monsoon rainfall for all years from to is about millimeters. What effect does El Niño appear to have on monsoon rains?
You look at real estate ads for houses in Naples, Florida. There are many houses ranging from in price. The few houses on the water, however, have prices up to . The distribution of house prices will be
(a) skewed to the left.
(b) roughly symmetric.
(c) skewed to the right.
(d) unimodal.
(e) too high.
The mean salary of all female workers is The mean salary of all male workers is What must be true about the mean salary of all workers?
(a) It must be
(b) It must be larger than the median salary.
(c) It could be any number between and
(d) It must be larger than
(e) It cannot be larger than
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