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Astudy conducted at a college shows that 54% of the graduates find a job within 1 year of graduating. What is the probagbility that among 9 randomly selected graduates, at least 1 finds a job within 1 year.
Market researchers would like to know if customers prefer a well-known brand over a generic brand of soft drink. They give a large sample of people the two drinks to taste in a random order and ask them which one tastes better.
If the standard deviation is 4.09, how large a sample is needed to get the desired information to be accurate within 0.53 decibels? Show all work.
In each month, the proportion of "Prize" bonds that win a prize is 1 in 11000. There is a large number of prizes and all bonds are equally likely to win each prize.
Interpret the interaction graph in terms of what it shows about the three effects tested.
If random sample of size n = 16 are selected, can we say anything about the xbar distribution of sample means?
The price of XYZ Corporation stock is normally distributed all through the year with mean of $42.00 per share and a standard deviation of $2.25 per share. Suppose that the stock is traded 240 days out of the year.
Compute the 99% confidence interval for the population mean based on the sample 62, 68, 61, 64, 65, 62, and 66. Then, change the number from 66 to 16 and calculate the confidence interval.
Suppose a restaurant business succeeds 60% of the time. Suppose that there are three such restaurants open in your city. When they don't compete with one another, it is reasonable to believe that their relative success would be independent.
A random sample of 16 federal inmates is selected. What is the probability that exactly 12 are serving time for drug dealing?
She has 95% confidence that the mean annual income of the 2 million customers is between $70,000 and $85,000. Explain the meaning of the statement.
A candy bar manufacturer is interested in trying to estimate how sales are influenced by the price of their product. To do this, the company randomly chooses 6 small cities and offers the candy bar at different prices.
Suppose that a random sample of 800 early replacement buyers yields a mean number of dealers visited of 1 = 3.3, and that a random sample of 500 late replacement buyers yields a mean number of dealers visited of 2= 4.5.
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