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Question: Use the pennstate2 dataset on the companion website for this exercise. The variable CDs is the approximate number of music CDs owned by a student.
a. Draw a stem-and-leaf plot for the CDs variable.
b. Draw a histogram for the CDs variable.
c. Draw a dotplot for the CDs variable.
d. Describe the shape of the data for the CDs variable, and comment on any other interesting features of the data.
e. Calculate the mean number and the median number of CDs. Compare these two values.
f. For these data, do you think the mean or the median is a better description of the location of the data? Briefly explain.
A high school counselor wanted to know if tenth-graders at her high school tend to have more free time than the twelfth-graders.
QUALITY CONTROL The quality-control department of Starr Communications, the manufacturer of video-game cartridges, has determined from records that 1.5%.
Body mass index is measured as the ratio of weight in kilograms to height in meters squared. Are there outliers in the distribution of BMI (justify your answer)?
You have made an investment that pays you $2,000 at the end of the first year, and then decreases by 9% each year for 4 more years (5years total). What is the FUTURE worth of this investment? (interest rate= 9%).
Explain the difference between the information given by the tests of statistical significance t and Chi Square, and measures of association Cramer's V, Gamma and Pearson's correlation coefficient, r.
Describe a plan for using the applet to explore the behavior of the median of an even number of observations.- Use your plan and summarize what you have learned.
From the above function, it can be said that the expected yearly income of and find the multiple coefficient of determination
a random variable x has the following probability distrubution.x fx0 0.081 0.172 0.453 0.254 0.05a. deterime the
A recent study focused on the number of times men and women who live alone buy take-out dinner in a month. The information is summarized below.
A random sample of 20 users is obtained. Using the Binomial Probability Distribution, determine the following probabilities?
a computer laboratory manager was in charge of purchasing new battery packs for her lab of laptop computers. she
An experiment is described. Describe a typical outcome, and count the number of outcomes. Determine the number of outcomes in each of the events defined.
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