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Find the indicated z score. The graph depicts the standard normal distrubtion with mean 0 and standard deviation 1. the indicated z score is? round to two decimal places. z 0 the shaded region is 0.2451
if a manager believes that the required sample size is too large for a situation in which she desires to estimate the
The formal addition rule expressed the probability of a or b as follows: p(a or b) =p(a)+p(b)-p(a and b). Rewrite the expression for p(a or b) assuming that the addition rule uses the exclusive or instead of the inclusive or (recall that the exclusiv..
A person has purchased 5 of 1,000 tickets sold in a certain raffle. To determine the 10 prizewinners, 10 tickets are drawn at random and without replacement. compute the probability that he wins at least one prize.
Normal distribution with a mean of 131 pounds and a standard deviation of 5.9574 pounds. What percent of the students would you expect to weigh at least 145 pounds?
What are its classes? What are their periods? Are they transient or recurrent? Compute the transition probabilities Pi,j .
determine the mean and standard deviation of the variable x in the binomial distribution where n 4 and ?
Let X be the number of yes votes obtained from a random sample of 200 out of the entire voting population. What is the expected value of X if, in fact, 65% of all voters supported the dictator?
Assume the shopping time followed an approximately normal distribution. Use a 5% level of significance to test the claim that the average shopping time foe women with children in Carson mall is higher than the national average for this type of sto..
As a part of a class project, your statistics instructor asks you to weigh a sample of 100 items from a shipment of 500. You are testing the null hypothesis that the mean is greater or equal to 10 lbs.
Two automatic dispensing machines are being considered for use in a fast-food chain. The first dispenses an amount of liquid that has a normal distribution with a mean of 11.9 ounces and a standard deviation of 0.07 ounces.
suppose the mean systolic blood pressure in a group of individuals is 150 mmhg with a standard deviation of 15.
Determine the typical seasonal patterns for sales using the ratio-to-moving-average method. Project the sales for 2004, and then seasonally adjust each quarter.
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