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For a new study conducted by a fitness magazine, 256 females were randomly selected. For each, the mean daily calorie consumption was calculated for a September-February period. A second sample of females was chosen independently of the first. For each of them, the mean daily calorie consumption was calculated for a March-August period. During the September-February period, participants consumed a mean of 224 calories daily with a standard deviation of. During the March-August period, participants consumed a mean of2382.2 calories daily with a standard deviation of 255. The population standard deviations of daily calories consumed for females in the two periods can be estimated using the sample standard deviations, as the samples that were used to compute them were quite large. Construct a confidence interval for 95% , the difference between the mean daily calorie consumption of females in September-February and the mean daily calorie consumption of females in March-August. Then complete the table below.
Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. (If necessary, consult a list of formulas.)
a. musician at a time. Union rules limit each performer to one instrument per job. Since studio and rehearsal time cost money. Sarah D wants you to find the minimum time to record the parts.
SmartMinds University is running a promotional raffle that offers a chance to win either a 1-year discount on tuition cost (which results in a $500 savings) or a 2-year discount on bookstore purchases. Is this promotion worth it if the tickets cost..
Develop a box plot of the variable price and comment on the result. Are there any out- liers? What is the median price? What is the value of the first and the third quartile?
Perform a complete test of hypotheses to determine if there is evidence to claim the tires produced by Machelin wear out too fast. Include a P-value with the test.
Do the association between the sizes of the heads and bodies of the two species appear to be strong? Explain.
Find the probability that a randomly selected teacher earns and what sample size is necessary to double the standard error of the mean and what sample size is needed to cut the standard error of the mean in half?
What percentage of men are too tall to fit through a standard doorway without bending, and what percentage of women are too tall to fit?
If 20 measurements are taken and their standard deviation is 1.8, is there enough evidence to reject the claim that her standard deviation is within the limit at ∞ = .01?
Characteristics of residential properties - Construct a table that includes the summary statistics (mean, standard deviation, minimum and maximum) of all the variables. Explain briefly your findings
Suppose that the number of years a car will run is exponentially distributed with parameter µ = 1/4. If Prosser buys a used car today, what is the probability that it will still run after 4 years?
Assume you randomly sample one mouse from the colony. The probability his age will be between 55 and 70 days is?
(a) Write the claim mathematically and identify Upper H 0and Upper H Subscript a. (b) Find the critical value(s) and identify the rejection region(s). (c) Find the standardized test statistic.
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