Relationship between amount of money people spend on cars
A car dealer is interested in the relationship between the amount of money (x) people spend on their cars, and the number of miles the car runs (y) before a breakdown. A random sample of 25 car owners gives following results. SSx= 4296.4 SSxy=514028
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The mean selling price (in $ thousands) of the homes was computed earlier to be $221.10, with a standard deviation of $47.11. Use the normal distribution to estimate the percent of homes selling for more than $280.00.
The construction process is modified through the use of a "quick setting concrete" for the foundation and floor. This should allow the next phase of construction to start in a timely manner. A sample of 12 garages had a mean construction time of 3
Determine the correlatins between pairs of all interval variables (i,e., absences with PE, PE with math, math with writing) How much of the math grade can be explained by the PE grade? How much of the writing grade can be explained by the reading
Enrollment in a particular class for last semester has been 120, 126, 110, and 130. Develop a forecast of enrollment next semester using exponential smoothing with alpha = 0.2. assume that an initial forecast for the first semester was 120 ( so th
A car dealer is interested in the relationship between the amount of money (x) people spend on their cars, and the number of miles the car runs (y) before a breakdown. A random sample of 25 car owners gives following results. SSx= 4296.4 SSxy=5140
Geyser in yellowstone national park has a mean time of 85 minutes between eruptions with a standard deviation of 21.25 minutes interval time between eruptions is normally distributed find the probability that is a sample of 30eruption intervals th
Is there evidence of a significant difference in the variance of the access read times for the three file sizes? Test at the 95% confidence level.
Which of the following is most likely a parameter as opposed to a statistic?
A financial researcher found the following data values in his sample survey of customer spending habits on his company's next Generation Widget: $18, $19, $19, $23, $28, $35, $36, and $51. What is the mean of the data? ______ What is the median of
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