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Annual starting salaries for college graduates with business administration degrees are believed to have a standard deviation of approximately $2000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired. How large a sample should be taken if the desired margin of error is?
(a) $500 ____________
(b) $200 ____________
(c) $100 ____________
Test hypothesis that both propellants have same mean burning rate. Utilize α=0.05. Compute the P value.
They were planted in four different locations, so we will consider the field as a second factor because different soil and moisture types can also have an effect on yield. The interaction plot below was obtained.
Given the following data on hotel check-ins for a 6-month period:
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots
Using Sally's estimate of demand that follows, how many T-shirts should she produce for the upcoming event?
Real estate agents always say "location, location, location" is the most important thing in buying a house. We want to know if the sales prices of homes in two neighborhoods are similar. A random sample is taken from each neighborhood. The prices ..
The population of lengths of aluminium-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches.
Use normal approximation to determine probability that x = 2. Illustrate all work.
For the data giben below, prepare a R-chart. Note that the sample size is three.
Z score on comparison distribution for sample score and your conclusion. Suppose that all population are normally distributed.
Can we conclude that the mean time for a game is less than 3.50 hours? Use the .05 significance level.
Using the .05 level of significance: a) Is there a difference among types of gasoline? b) Is there a difference in the cars?
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