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Weakly earnings on a certain import venture are approximately normally distributed with a known mean of 219 and unknown standard deviation. If the proportion of earnings over 291 is 0.155, find the standard deviation.
what is the value of sp for the following set of data? explain answer and show work please.x y1 53 38
For the set of data below construct a grouped frequency distribution that as well contains the real limits of each interval, midpoint of each interval, the cumulative frequency,
At alpha = 0.05, is there enough evidence to conclude that proportions vary from those in the study?
The calculated value of F in a one-way analysis is 8.23. The numerator degrees of freedom and denominator degrees of freedom are 4 and 8, respectively.
the length of conversations between supervisors and workers in a certain manufacturing industry is normally distributed
Determine the probability that at most 4 fish will be killed?
When a 99% confidence interval is calculated instead of a 90% confidence interval with n being the same, the margin of error will be
Consider a random sample of size n from an exponential distribution, Xi ~ EXP(1,eta). a) Show that Q = X1:n - eta is a pivotal quantity and find its distribution.
Construct the 95 percent confidence interval for the difference between the two population means.
A random variable is binomially distributed with n = 16 and π = .40. The expected value and standard deviation - find the sample size to estimate the mean with an error of ± 4 and 95 percent confidence (rounded to the next higher integer).
suppose a life insurance company insures the lives of 1000 men aged 30. if actuarial studies show that the probability
Sales figures and profits for the stores are given in the following table. Obtain a regression line for the data and predict profit for a store assuming sales of $10 million.
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