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In the laboratory, a student performed an experiment in which the final length of a piece of wire was a significant measurement. In three separate experiments, the student found the length of wire after the experiment to be 23.50mm, 25.0mm, and 35mm. Find the average of the three trials, so the correct number of significant figures, and decide if these measurements gave an accurate result.
With a mean of $70,000 and a standard deviation of $20,000. A loan application is received this morning. What is the probability: a. The amount requested is $80,000 or more?
The sample mean is 2.59 and the sample standard deviation is .66. Conduct the following test using 95% level of confidence.
The following frequency table lists the sales of an item and the number of times it has occurred. It was obtained from historical records.
The average balance for customer accounts in The Reserve Fund at the time it was frozen by the Securities Exchange Commission (SEC) was $22,500, with a standard deviation of $7,500.
Estimate with 95% confidence the mean reduction in time it takes for someone who has taken the sleeping pill to fall asleep.
A final exam in Statistics has a mean of 73 with a standard deviation of 7.73. Assume that a random sample of 24 students is selected and the mean test score of the sample is computed. What percentage of sample means are less than 70?
A sample of 25 concession stand purchases at the October 22 matinee of Bride of Chucky showed a mean purchase of $5.29 with a standard deviation of $2.91.
A standard deviation of 1.5. The distribution is normal. What proportion of faculty consume an amount between 4 & 6 cups?
Assume a population standard deviation of 450-kilowatt hours. Determine the standard error of the mean.
Construct a 94% confidence interval for the true mean fill volume for all jugs of softener.
Give the expected value and standard deviation of defective shoes in the ShoeFit store order.
Your statistics instructor wants you to determine a confidence interval estimate for the mean test score for the next exam.
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