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Let x be a random variable representing the length of a cutthroat trout in Pyramid lake. A friend claims that the average length of trout caught in this lake is 19 inches. To test this claim we find that a sample of 13 trout has a mean length of 18.1 inches with a sample standard deviation of 3.3 inches. The population standard deviation is unknown. If you assume that the population mean is 19, find the P-value corresponding to the hypothesis that the average cutthroat trout length is different from 19 (i.e. two-tail test).
She then uses the mean and standard deviation of these values to estimate the mean value for all parts the operator is making. Construct a 95% confidence interval for the me
Two airlines fly to Memphis. according to airport data for the past year, wings airlines planes arrived on time 330 times and were late 60 times. Global airlines planes arri
Suppose that the population follows the normal distribution. Forty trucks are randomly selected and weighed. Within what limits will 95 percent of the sample means occur?
An election poll reported that a candidate has an approval rating of 54% with a margin of error of 4%. Construct a confidence interval for proportion of adults who approve o
Women's incomes. The average income of American women who work full-time and have only a high school degree is $33,230. You wonder whether the mean income of female graduate
An adaptive cluster sample initially selects a random sample of n = 4 strips from the N = 25 in the study region. Each strip contains M = 12 secondary units. Neighborhoods a
Suppose that inspection is conducted only after the first and second operations. Nonconforming parts are not forwarded to the next operation. What is the unit cost per accep
A container of liquid laundry detergent promises over 100 loads from the bottle. You sample 45 bottles and find a mean of 102 loads with a standard deviation of 3.75 loads.
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