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A study claims that the mean age of online dating users is 40 years. Some researchers think this is not accurate and want to show the mean age is not 40 years.
Set up the competing hypotheses such that rejection of the null hypothesis supports the visitor's belief.
Find the percentage of buyers who said their price range is between $150,000 and $153,300.
Biology and Environmental Science The historical mean yield of soybeans from farms in Indiana is 31.9 bushels per acre.
Suppose a geyser has a mean time between eruptions of 68 minutes. Let the interval oftime between the eruptions be normally distributed with standard deviation 26minutes. (round everything to four decimal places)
Bananas. Here are the prices (in cents per pound) of bananas reported from 15 markets surveyed by the U.S. Department of Agriculture.
question 1an experiment was conducted to compare the weights of the combs of roosters fed two different
If these two assumptions are correct, then what is the probability that the sample mean waiting time,T, based on your random sample of size n=36, will exceed 104 hours?
The quantity of the sample size has a significant influence on the standard error. Since n is the denominator of the standard error formula, as n increases, the standard error increases. The more data that you have, the more accurate you can be.
Another lamp has one bulb of the same type. If it burns out , it is replaced with another. Find the probability that both fail within a total of 1000 hours.
Describe expected value (EV) of an investment if there is a 20% chance of realizing a return of $20,000 or a 55% chance of realizing a return of $25,000, or there could be a loss of $15,000?
Give an example of a scenario of interest to you for which the sampling distribution of p^ would be approximately normal. Explain why the conditions for it to be approximately normal are satisfied for your example.
A. what is the probability a randomly chosen business customer flying is on a jumbo jet? B. what is the probability a randomly chosen non-business customer is on an ordinary jet?
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