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A researcher performs a hypothesis test to test the claim that for a particular manufacturer, the mean weight of cereal in its 18 ounce boxes is less than 18 ounces. The computer display is shown below. Using a significance level of 0.05, what is your conclusion from these data?
N MEAN STDEV SE MEAN T P VALUEweight 21 17.883 0.212 0.0463 -2.53 0.01
Can one conclude at a level of significance of .01 that the new ball has improved his game?
Hypothesis test for two factors ANOVA. Describe what thses represent and, based on figure, whether there is a problem with the data r otherwise.
A voltmeter is used to measure a known voltage of 100 V. Forty percent of the readings are within 0.5 V of the true value. Estimate the standard deviation for the meter.
If a randomly selected student has a score of 40, then how many standard deviations away from the mean is that student's score?
What sample size should be chosen so that there is 0.95 probability of estimating the mean monthly income in $150 or less?
Is a football jersey number a quantitative or a categorical variable? Support your answer with a detailed explanation
How is data screening related to the assumptions of the statistic you will choose to analyze your data?
We can determine the following information about the amount remaining in a toothpaste tube without invading anyones privacy. How much toothpaste would you expect to be remaining in the tube?
The histograms of some sampling distributions are symmetrical. T-F What would make a histogram symmetrical, and give an example of a symmetrical distribution? A random sample of size 36 is to be selected from a population that has a mean μ = 50 an..
A random sample of 95 printers discovered that 20 of them were being used in small businesses. Find the 95% limit for the population proportion of printers that are used in small businesses.
Ten pairs of points yielded a correlation coefficient of 0.790. If α = 0.05, which of the following statements is correct if H0 = ρ0?
How to calculate expected difference between the samples means, and how does larger variability affect the size of the standard error for the sample mean difference?
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