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A study showed 36 out of 120 kids watch cartoons. Which is the possible proportion/percentage of students who watched cartoons with 95% level of confidence.
If you decrease the level of confidence from 90% to 85%, the width of confidence interval will increase by or decrease by what %?
The interval 6 to 12 pounds. find the probability that a person on this diet losses more than 11 pounds in the first two months.
Infomercials often peddle products under the guise of "studies show," While some of the products are surprisingly good, many aren't.
As a condition of employment, Fashion Industries applicants must pass a drug test. Of the last 220 applicants 14 failed the test. Develop a 99 percent confidence interval for the proportion of applicants that fail the test.
question a food research laboratory conducts a series of taste tests to compare two sauce recipes a and b. customers
A sample of 81 observations is selected from a normal population with a standard deviation of 5. The sample mean is 40. Determine the 95% confidence interval for the population mean.
A pharmaceutical company is testing the effectiveness of a new drug for lowering cholesterol. As part of this trial they wish to determine whether there is a difference between the effectiveness for women and for men. At a=5, what is the test valu..
Past studies have revealed that only 88% of booked passengers actually arrive for flight.) Determine probability that if airline books 17 persons, not adequate seats will be available.
For the statement: The mean amount of Pepsi in cans is at least 12 oz. Express the null hypothesis and the alternative hypothesis in symbolic form.
a nursing school wants to estimate the true mean annual income of its alumni. it randomly samples 120 of its alumni.
the sampling distribution of the sample mean. use the central limit theorem to find the approximate probability that the mean number of flaws exceeds 1.8 per square yard.
Assuming that a hypothesis test of the claim has been conducted and that the conclusion is to reject the null hypothesis, state the conclusion in nontechnical terms.
Consider the experiment of rolling a pair of dice. Suppose that we are interested in the sum of the face values showing on the dice.
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