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The mean IQ is 100, with a standard deviation of 14. Suppose IQ scores are normally distributed. If your IQ is 116, what is your percentile rank?
Conduct a hypothesis test. What is the p-value and how much evidence is there to conclude that the power plants cooling system is not working properly.
Include the null and alternative hypothes, name the test being used, find the correct test statistic, the critical statistic, and a diagram.
suppose the coach of the football team wants to estimate the proportion of the population of fans who support his
The probability that D1 operates correctly is 0.95 and the probability that D2 operates correctly is 0.92. Find the probability that the sprinkler system will come on.
The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds.
Determine regression line for predicting January temperature from latitude.
public transportation and the automobile are two methods an employee can use to get towork each day. samples of times
according to data from the environmental protection agency the average daily water consumption for a household of four
Service A delivers the document with probability 0.9, Service B with probability 0.9 and Service C with probability 0.8. What is the probability that at least one copy of the document will be delivered on time?
Do these scores suggest that the different foods are differentially preferred by people in general? (Use the .05 significance level.)
A random sample of 100 observations is obtained from a normally distributed population with a standard deviation of 10. What is a 95% confidence interval for the mean of the population if the sample mean is 40?
If all the other quantities remain the same, how does the indicated change affect the width of the confidence interval?
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