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In a survey of 3212 ?adults, 1419 say they have started paying bills online in the last year.
Construct a? 99% confidence interval for the population proportion. Interpret the results.
A? 99% confidence interval for the population proportion is
?(Round to three decimal places as? needed.)
The Ludlow Wildcats baseball team, a minor league team in the Cleveland Indians orgainzation, plays 70 precent of their games at night and 30 percent during the day.
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
the manufacturer of the x-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before
mortgage broker is offering home mortgages at a rate of 9.5%, but the broker is fearful that this valueis higher than many others are charging. A sample of 40 mortgages filed in the county courthouse shows anaverage of 9.25% with a standard deviation..
Scores on an exam appear to follow a normal distribution with μ = 60 and σ = 20. - For what range of scores should a D be given? - What percentage of the students will get a D?
Let's assume that the annual chocolate consumption follows the normal distribution with a standard deviation of 3.6 pounds.
a researcher concerned about the foreign ownership of the retail trade industry in the u.s. conducts a survey of
the current necessary to produce a certain level of brightness of a television tube was measured for two different
Use the mean, median, and mode to make a statement about the difference in performance for city and highway driving.
The manufacturer of a computer terminal reports in its advertising that the mean life of the terminal, under normal use, is 6 years, with a standard deviation of 1.4 years.
a player tosses two coins. if two heads show he wins 4. if one head shows he wins 2 but if two tails show he must pay a
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