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Find the minimum required sample size for estimating the average number of designer shirts sold per day to within 10 units with 90% confidence if the standard deviation of the number of shirts sold per day is about 50.
Normal population having a standard deviation of 0.04, what is the probability that the mean of a random sample of size 25 will be "off" by at most 0.02?
you are head of risk management for the norne corporation. due to the size of your company you feel comfortable
for 11 repeated independent trials with constant probability of success 0.4 for all trials find the probability of
How do you interpret the p-values in a regression output? What does a p-value of .0495 mean? What significance level is this?
A single observation of a random variable having a geometric distribution is used to test the null hypothesis θ = θ0 against the alternative hypothesis θ = θ1 > θ0.
From Group of 40 People, a jury of 12 people is selected. In how many various ways can a jury of 12 people be selected?
The manager of a local branch of a bank believes that over the past few years the bank has begun to cater to a different clientele and that the average amount withdrawn from its ATMs is no longer $140.00.
a manufacturer of nickel-hydrogen batteries randomly selects 100 nickel plates for test cells cycles them a specified
Define Yt = et for t not= 1 and Yt = 1/sqrt2 (e_t-1_squared - 1) for t=1. Show that Yt is a white noise process despite the fact that Y1 is perfectly predictable from the earlier observation.
The insect then chooses one of the two branches. Suppose that 45 of 75 insects choose the pheromone branch. The 95% large-sample confidence interval for the proportion of the population that prefers the pheromone branch is:
Set up hypothesis and two-tailed decision rule for right mean using 5% level of significance. Hypothesis for a two-tailed decision is?
giving a test to a group of students the grades and gender are summarized
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