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An election coming up next week promises to be very close. In fact, assume that 50% are in favor and 50% are against. Suppose you conduct a poll of 791 randomly selected likey votes. Approx. how different will the percent in favor (from the poll) be from the 50% in the population you are trying to estimate?
To report their finding they want to create a 90% confidence interval. What would be the margin error for this confidence interval?
Does this sample indicate a smaller average? Use α = 0.05 and assume a normally distributed population.
Computing the probability values using normal distribution - what proportion of licensed drivers are less than 30 years old?
A researcher wishes to forcast the proportion of fish in a perticular lake which is inedible due to pollution of the lake.
A concessionaire for the local ballpark has made a table of conditional values for the different alternatives also states of nature
Do any of the selected samples seem to be out of the control limits? Describe.
Random sample of 64 services is selected. Assume the population consists of 400 services. Find out the standard error of mean.
Appalachian Coal mining believes it can enhance labor productivity and therefore net revenue by reducing air pollution in its mines. It estimates that the marginal cost function for reducing pollution by installing additional capital equipment is.
Determine the probability of choosing at random license plate which ends in the even number?
Suppose that a model for the joint distribution of these rvs is a bivariate normal distribution.
A bag contains 5 blue balls and 8 purple balls. If 3 balls are chosen randomly and without replacement, form the bag. Let x be the number of blue balls obtained. Then x has a distribution.
Probability based on normal distribution. Suppose among X has a normal distribution, and find the indicated probability.
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