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Describe which scale you would use to measure the following random variables. State reasons for your choice and whether sample scale values correspond to population values.
(a) Gold, silver, and bronze medals in an Olympic competition.
(b) Letter grades of an examination in statistics.
(c) Iron content in an ore sample
(d) Artifacts found in a series of archaeological closed assemblages (e.g., graves).
(i) Types of artifacts.
(ii) Quantity of each type of artifact.
(e) Body length of a 3-year female sperm whale.
(f) Cross-classification of hair color versus eye color of a sample of school children.
Use the Histogram option in Data Analysis to check the assumption of normality. Comment on the findings.
errors in a billing process often lead to customer dissatisfaction and ultimately hurt bottom-line profits. an article
The US Census Bureau announce that the median sales price of new houses sold in April 2009 was $221,600 while the mean sales price was $274,300. Assume that the standard deviation of the prices is $90,000.
a friend of mine is giving a dinner party. his current wine supply includes 8 bottles of zinfandel 12 of merlot and 11
Thus, the first question he examines is as follows: Is there a difference in the number of points students earned on their educational statistics pretests and posttests?
If the gender-selection method has no effect and boys and girls are equally likely, find the mean number of boys born in groups of 152. Round to the nearest whole number.
find the number of units that produces a maximum revenue. the revenue r is measured in dollars and x is the number of
Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and waking
Calculate the standard deviation for this data. Explain why statisticians typically use the standard deviation rather than the average deviation.
Probability that a home has a swimming pool is .38. What is the probability that a randomly selected home in the city has an attached garage and a swimming pool?
considering that a researcher can test at the ltp .05 95 p .01 99 or p .001 99.9 level for statistical significance
the computer-science aptitude score x and the achievement score y measured by a comprehensive final were measured for
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