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(1)The claim is that the proportion of peas with yellow pods is equal to 0.25 (or 25%). The sample statistics from one experiment include 590 peas with 126 of them having yellow pods. Find the value of the test statistic.
(2) The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35, and the sample statistics include n equals=1209 subjects with 447 saying that they smoked a cigarette in the past week. Find the value of the test statistic
(3) The claim is that the white blood cell counts of adult females are normally distributed, with a standard deviation equal to 3.13. A random sample of 38 adult females has white blood cell counts with a mean of 8.48 and a standard deviation of 3.48. Find the value of the test statistic.
(4) The claim is that the IQ scores of statistics professors are normally distributed, with a mean less than 122. A sample of 28 professors had a mean IQ score of 120 with a standard deviation of 13. Find the value of the test statistic
statistics from a random sample of 13 men and 19 womens college grade point averages showed the mens average was 2.898
q1. a portfolio manager was analyzing the price-earnings ratio for this years performance. his boss said thatthe
question a researcher believes that the percentage of people who exercise in california is greater than the national
question an investigator hypothesizes that cholesterol level in children might be affected by educating
the average cost per night of a hotel room in new york city is 273 smartmoney march 2009. assume this estimate is based
Suppose a new weight loss program was sponsored by the local health and fitness club in a small town. The program claims to make people lose more than five pounds in a month. Twelve participants were selected and their weights were recorded.
If we assume that the lifetime of this type of bulb has a standard deviation of 400 hours, can we conclude at the 5% significance level that the claim is true.
Random Sample: Before you begin your analysis you are required to take a random sample of size 110 from the 170 cases in the file. Use the file Random_Sample_Generator-13-2.xls to do this.
Assume that the number of customers who arrive at a water ice stand follows the Poisson distribution with an average rate of 6.4 per 30 minutes. What is the probability that three or four customers will arrive during the next 30 minutes?
What is a Wilcoxon-Whitney Test and when is it used? I am not sure when to use the Wilcoxon-Whitney Test and what it is testing.
the only fruit shop received a shipment of fruit and they would like to estimate the percentage of fruit which meets
Pollsters attempt to find out whether or not person is a "likely voter" before they count their opinion in poll. If we suppose 40% of registered voters will really vote.
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