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To estimate the true mean weight of packages received by a parcel service, 39 packages are randomly selected and weighed. The sample has a mean weight of 15.3 pounds and a standard deviation of 1.9 pounds. Create a 95% confidence interval estimate for the true mean weight of all packages received by the parcel service.
A box contains four tickets, one marked with a star and the other three blank. One draw is made from this box at random.
Help with showing how do detrime the standard deviation of a problem when the standard deviation is 5. An example would help me to work out a problem for the normal probability distribution.
Other group (drawing 6 slips without replacement from among 45). What is the probability that at least one of the shifts will be unrepresented in that sample of workers?
Mary claims that the range, standard deviation and variance are all measures of dispersion. John adds to Mary's claim by stating that the coefficient of variation is a measure of relative dispersion.
The number of passengers on the Carnival Sensation during one-week cruises in the Caribbean follows the normal distribution.
Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F. Is body temperature of 99.00 °F unusual? Why or why not?
Construct upper and lower control limits for the x chart, using the given product parameters. (b) Plot the data on the control chart. (c) Is this process in control? Explain your reasoning.
Can you determine the exact number of days that it rained? Can you conclude anything about the number of days that it rained? Explain.
Estimate the 95% confidence interval for the proportion of the electorate that support this policy.
Sample of 81 business students over a one-week period. Assume the population standard deviation is 1.8 hours. with a ,95 probability, the margin of error is approximately.
An oil co. is drilling some wells. the results are described as either a dry well or a producer well. Past experience suggests that 10% of exploratory wells are producer wells.
An insurance company, based on past experience, estimates the mean damage for a natural disaster in its area is $5,000. After introducing several plans to prevent loss
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