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Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean u=222 days and standard deviation o=13 days. What is the probability that a randomly selected pregnancy lasts less than 218 days?
A textile manufacturer estimates that it produces bolts of cloth with flaws following a Poisson distribution that has an average of one flaw per 200 feet of cloth.
Suppose it is desired to estimate the population mean number of miles with a margin of error of ± 2 miles at 95% confidence. Do the data provide this desired level of precision? What action, if any, would you recommend be taken?
3 cards are randomly selected without replacement from an ordinary deck of 52 playing cards. Compute the conditional probability that the first card selected is a spade, given that the second and third cards are spades.
The following are quality control data for a manufacturing process at Kensport Chemical Company. The data show the temperature in degrees centigrade at five point in time during a manufacturing cycle.
Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. What is the margin of error?
Find out the confidence interval for the population mean also interpret the result. A researcher is interested in whether social assertiveness might be influenced by training procedures.
For the experiment above, let X denote the number of hearts that are drawn. For this random variable, find its expected value and standard deviation.
Suppose a machine is worth 33000 after 4 years and 18000 after 8. Find the rate of depreciation using the linear depreciation method
Findout the normal model for the given proportions. The professor has every student toss a coin 50 times also calculated the proportion
The distribution is normal. The mean numbers of trials to learn maze for the group with the colrful wallpaper is 11. What is the standard deviation of the distribution of means?
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.
Use appropriate Excel functions to solve the following questions: Compute the probability of receiving four calls in a five-minute interval of time.
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