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Question: The manager of a frozen yogurt store claims that a medium-size serving contains an average of more than 4 ounces of yogurt.From a random sample of 14 servings, she obtains a mean of 4.31 ounces and a standard deviation of .52 ounce.
Test,with, α=.05 the manager's claim.
Find the p-value for the test. Assume that the distribution of weight per serving is normal.
Draw a curve to support your explanation.
1. find the margin of error for the given values of csand nc0.95s3.1n812. construct the confidence interval to find the
The monthly rate of return for the mutual fund Invest 2000 follows a Normal distribution with mean 0.75% and standard deviation 0.3%.
Scores are normally distributed with a mean of 460 and standard deviation of 80. The top 2.5 percent of the applicants would have a score of at least.
The progress report of a research analyst to the supervisor stated: "All the estimated regression coefficients in our model with three predictor variables to predict sales are statistically significant.
An article in Baltimore Sun claimed that the typical supermarket trip takes a mean of 22 minutes. Suppose that in an effort to test this claim, you select a sample of 50 shoppers at a Baltimore City Giant.
A shop manual gives 6.5 hours as the average time required to perform a 30,000 mile major maintenance service on a Porsche 911. Last month a mechanic performed 11 such services, and his required times were as follows.
Given this information, what is the probability that the mesh polo shirt came from box 1? (Round your answer to 3 decimal places.)
Each subject's heart rate, blood pressure, oxygen uptake, and perceived exertion during snow removal were compared with the values obtained during treadmill and arm- crank ergometer testing.
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..
what proportion of the data from a normal distribution is two standard deviations from the mean?1. 0.47722. 0.34133.
Describe what is measured by the estimated standard error in the bottom of the independent-measures t statistics.
The z-score of 1.33 tells you that Eric's time to get to work is 1.33 standard deviations from the mean.
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