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Question: I'd die without my phone! In a survey of over 2000 U.S. teenagers by Harris Interactive, 47% said that "their social life would end or be worsened without their cell phone."49 One survey question asked the teens how important it is for their phone to have certain features. The figure below displays data on the percent who indicated that a particular feature is vital.
(a) Explain how the graph gives a misleading impression.
(b) Would it be appropriate to make a pie chart to display these data? Why or why not?
(c) Make a graph of the data that isn't misleading.
A student must choose one of the subjects, art, geology, or psychology, as an elective. She is equally likely to choose art or psychology and twice as likely to choose geology.
Write a short report describing the differences and similarities between experiments and surveys. Include a discussion of the advantages and disadvantages.
condeacute nast traveler magazine conducts an annual survey of its readers in order to rate the top 80 cruise ships in
In a survey of women in a certain country (ages 20-29) the mean height was 64.5 inches with a standard deviation of 2.75 inches. What height represents the 90th percentile? What height represents the first quartile?
Suppose the least squares regression equation is Y' = 1,202 + 1,133X. When X = 3, what does Y' equal?
data on the number of occurrences per time period and observed frequencies follow. compute the value of the test
Horsepower. Cars currently sold in the United States have an average of 135 horsepower, with a standard deviation of 40 horsepower.
The population of IQ scores forms a normal distribution with a mean of u=100 and a standard deviation with a mean of sigma=15.
If two diodes are selected at random without replacement, what is the probability that at least one of these diodes is defective?
Compute and interpret the mean of the random variable X - Find the probability of a family having x girls out of 3 children and Sketch the region
An industrial engineer at Lyons Products would like to determine whether there are more units produced on the afternoon shift than on the morning shift.
Calculate the incidence rate of hypertension in the cohort with and without an actuarial adjustment. Did the actuarial adjustment make a difference? Explain your answer.
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