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Chapter 1: Q 107. (page 73)
If a distribution is skewed to the right with no outliers,
(a) mean median. (d) mean > median.
(b) mean median. (e) We can鈥檛 tell without examining the data.
(c) mean median.
The correct option is (d) mean median.
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The histogram below shows the distribution of the per cent of women aged 15 and over who have never married in each of the 50 states and the District of Columbia.
The center of this distribution is in the interval
(a) to
(b) to
(c)
(d) to
(e)to
Comparing AP scores The table below gives the distribution of grades earned by students taking the AP Calculus AB and AP Statistics exams in
(a) Make an appropriate graphical display to compare the grade distributions for AP Calculus AB and AP Statistics.
(b) Write a few sentences comparing the two distributions of exam grades.
Oatmeal and cholesterol Do eating oatmeal reduce cholesterol? An advertisement included the following graph as evidence that the answer is 鈥淵es.鈥�
(a) How is this graph misleading?
(b) Make a new graph that isn鈥檛 misleading. What do you conclude about the effect of eating oatmeal on cholesterol reduction?
At the Census Bureau Web site, you can view detailed data collected by the American Community Survey. The table below includes data for 10 people chosen at random from the more than one million people in households contacted by the survey. 鈥淪chool鈥� gives the highest level of education completed.
This data set contains
(a) 7 variables, 2 of which are categorical.
(b) 7 variables, 1 of which is categorical.
(c) 6 variables, 2 of which are categorical.
(d) 6 variables, 1 of which is categorical.
(e) None of these.
Earthquake intensities are measured using a device called a seismograph, which is designed to be most sensitive to earthquakes with intensities between 4.0 and 9.0 the Richter scale. Measurements of nine earthquakes gave the following readings:
where L indicates that the earthquake had an intensity below 4.0 and an H indicates that the earthquake had an intensity above 9.0. The median earthquake intensity of the sample is (a) 5.75. (c) 6.47. (e) Cannot be determined. (b) 6.00. (d) 8.70.
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