Confidence interval for the true mean
The average cost of living for a family of 4 in twelve different cities was found to be $65,351 with a standard deviation of $7711. In dollars, what is a 90% confidence interval for the true mean, m?
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Use the Normal approximation to find the probability (±0.0001) that "p-hat" is between 0.47 and 0.49: _____
Assume that the average length of the passenger cars in the United States is 21.4 feet with a standard deviation of 1.3 feet and that car length is normally distributed. Then what percentage of these cars will be between 22 and 24 feet long?
A vending machine distributor desires to be 95% confident that the coffee machine is dispensing the correct amount of coffee to in 0.15 fluid ounces. If it is known that the standard deviation is 0.32 fluid ounces, how many cups of coffee sh
Suppose tumor to be spherical, write the differential equation for growth rate of radius, r(t), of tumor if it is in first (avascular) phase and rate of change of volume is proportional to surface area.
The average cost of living for the family of 4 in twelve different cities was found to be $65,351 with a standard deviation of $7711. In dollars, what is a 90% confidence interval for the true mean, m?
A current study of 900 internet users in Europe found that 20% of internet users were women. Determine the 99.5% confidence interval of the true proportion, p, of women in Europe who use the internet?
Producer has offered to accept $57,400 payment at the end of each of next six years. How much interest will Charlie Corp. pay over term of loan?
What is the 98% confidence interval for the standard deviation, s, of birth weights at County General Hospital, if the standard deviation of the last 22 babies born there was 1.5 pounds? Keep two decimal place accuracy.
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