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The bacteria Escherichia coli are commonly found in the human bladder. Suppose that 3000 of the bacteria are present at time t-0. Then t minutes later, the number of bacteria present can be approximated by:
N(t) = 3000(2)^t/20.
How many bacteria will be present after 10 min? 20min? 30 min? 40 min? 60 min?
A recent report from the American Medical Association claims that for the first time in ten years, the average salary of psychiatrists was greater than $190,000 with a standard deviation of $27,000. What is the null hypothesis for his claim?
Calculate a 95 percent confidence interval for the population mean audit delay for all public owner-controlled companies in New Zealand.
All college males and females who worked last summer. We conjectured before seeing the data that men are more likely to work. The hypotheses to be tested are?
General Motors pays for employee education. The HR director would like to conduct a study on the average GPA of employees who have used this benefit to complete their degrees using a sample of education records over the past 10 years.
if i have been approved for a $70,000 loan toward the purchase of a new home at 12% interest. The mortgage is for 30 years. How much are the approximately annual payments of the loan? Hint: Assume you pay yearly.
Estimate and interpret the p-value of the calculated test statistic above.
Why is a normal distribution called "normal"? Investigate the answer to this question on the internet and share the answer in your own words. Be sure to cite your sources.
A research report summarizes the results of the hypothesis test by stating,"z = 2.13, p
Find out the mean number of letters that will arrive in two days.
A local politician in this town has stated that the average property taxes are $1800 and most people do not pay more than this amount. Conduct a test at the alpha = .01 level to determine if this is true. For this test, consider a sample size of 3..
She asked her assistant for a 95% confidence interval, approximately how large a sample did her assistant use to determine the interval estimate?
The Stroop task is when color words are printed in the wrong color; for example, the word red might be printed in the color blue.
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