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A standard IQ test has mean of 98 and a standard deviation of 16. We want to be 99% certain that we are 8 IQ points of the true mean. Determine the sample size.
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
This problem has to do with graphical plotting and computation for certain distribution. Please mention a detailed response to the questions listed with appropriate graphical and statistical data representation(s).
It is known that 60 percent of all registered voters in the 42nd congressional District are Republicans. There registered voters are selected at random from the district. Compute the probability that exactly 2 of the 3 selected are Republicans, u..
It is believed that population standard deviation is 15 days. If test is conducted using 0.05 level of significance, what conclusion must be reached?
Using the .01 significance level you will test to conclude if the analyst finds evidence that the boast of dealership A is correct. What will be your critical value?
A student with a 3.5 to 4 grade point average who took standardized test is randomly selected. Determine the probability that students test score is less than 36.
For the 20 test scores shown, find the percentile rank for a score of 86.
Ace Jack had no idea whether the $100,000 he pays for training for his used car salespeople works.
What is the probability that a randomly selected tire will have a life of at least 30,000 miles?
Construct a 99% confidence interval for the population mean tread wear for this type of tire.
What is the probability that more than one machine is in the system? Probability that more than two are broken and waiting to be repaired or being serviced? More than three? More than four?
Estimate the 95% confidence interval for the proportion of the electorate that support this policy.
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