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A tea-drinking Canadian friend of yours claims to have a very refined palate. She tells you that she can tell if, in preparing a cup of tea, milk is first added to the cup and then hot tea poured into the cup, or the hot tea is first poured into the cup and then the milk is added. To test her claims, you prepare ten cups of tea. Five have the milk added first and the other five the tea first. In a blind taste test, your friend tastes all ten cups and is asked to identify the five that had the milk added first.
How many different ways are there to select five of the ten cups?
If your friend is just guessing, what is the probability that she correctly identifies the five cups with the milk added first? (Enter your probability as a fraction.)
Waiting time is normally distributed. Calculate the value of the test statistic for your random sample rounded to two decimal places?
Suppose it is known that a new treatment is successful in curing muscular pain in 75% of the cases. If it is tried on 9 patients, find the probability that fewer than 7 patients are cured.
a correlation is computed for a sample of n 18 pairs of x and y values. what correlations are statistically
Tthe population standard deviation is not equal to 8 at the 0.05 level of significance. Calculate the value of the test statistic.
A sample of 15 items is placed on test with the eight failures occurring at the following times (in hours): 400, 430, 435, 460, 460, 490, 520, 530. Based on Handbook H-108, should the lot be accepted?
It is generally believed that nearsightedness affects about 12% of all children. A school district tests the vision of 169 incoming kindergarten children.
"TV Pro Wrestling Spurs Teen Violence" is the headline of an article that reports on a study that related the viewing of pro wrestling on television
a large tank of fish from a hatchery is being delivered to a lake. the hatchery claims that the mean length of fish in
Test the significance of a correlation coefficient. Explain the coefficients used in regression analysis. Use regression analysis to analyze a time series
The average length of a maternity stay in a U.S. hospital is said to be 2.4 days with a standard deviation of 0.9 days.
According to Nielsen Media Research, the average number of hours of TV viewing per household per week in the United States is 50.4 hours.
Evaluate the performance of the judges.
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