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Which of the following does not explain a possible relationship between variables when the null hypothesis is rejected?
A) negative effect
B) direct cause-and-effect
C) caused by a third variable
D) reverse cause-and-effect
Environmental Protection Agency (EPA) fuel economy estimates for automobile models tested recently predicted a mean of 24.80 mpg and a standard deviation of 6.2mpg for highway driving. Assume that a normal model can be applied.
Assume that the population is 0.55. Compute the standard error of the sample proportion for the following sample sizes:
The new study is going to use the confidence level of 90%. The estimator or appreciative must be in 1% of the population proportion. Which is the necessary size of the sample?
An accounting firm has recently recruited six graduates: three men and three women. Three of the graduates are to be selected at random to work in the firms suburban office. Construct a probability tree.
If the top 15% of the test scores are usually good enough for admission to law school, find the cut off score for gaining admission.
Two-liter plastic bottles used for bottling cola are shipped in lots of 100. Suppose the lots are 5 percent defective. Some bottles leak, some are too small, and so forth.
Create probability tree showing all marginal, conditional, and joint probabilities. Create a joint probability table.
At a national seashore, the number of swimmers per day who require lifeguard assistance averages 4.1, on any day when 7 or more swimmers are assisted, the lifeguards receive a $20 bonus for extra effort.
How closely is the height of an individual related to the weight? Partial regression output for a sample of 92 individuals is below.
Construction of frequency distribution table for the given continuous data.
The U.S.Census Bureau announced that the median sales price of new homes sold i April 2009 was $221,660, and the mean sales price waas $274,300. Assume that the standard deviation of the prices is $90,000.
Using the least squares coded method, determine the equation for the straight line going through the earnings. Project, using the equation for the average hourly earnings for the year 1990
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