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According to the empirical rule, if the data from a "bell-shaped" normal distribution ______ percent of the observation will be contained between 2 standard deviations below the mean and 2 standard deviations above the mean.
a) 68.26
b) 88.89
c) 93.75
d) 95.44
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p-value.
Find out the variance for percentage of tickets? Determine the probability that your sample will have the average between 70 and 75?
Given the large difference between the two measures of central tendency, which of the two would you rely on in describing the average claim cost and why?
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Estimate the value of the population proportion.
Their resting heart rates were measured. A partial ANOVA table is given.
Describe a psychological research situation or scenario that would use a nonparametric test. Why would the nonparametric test be used?
Which of the following is true about the expected value of perfect information. It is the amount you would pay for any sample study.
Compute standard error of mean? Compute the margin of error, with 95% confidence.
Find the probability that he will answer at least 3 questions correctly.
Which component of a time series is most likely to occur? Which component has a pattern that must be complete in a single year and repeat from year to year?
A large population of metal rods have an average diameter of .943 inches with a standard deviation of .001 inches. The engineering specification for the rods requires that they be between .941 and .944 inches.
To find the 95 percent confidence interval for the true population mean. From the results below, is it true that 95% of the sample means will fall
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