estimate the difference in the amount of daily leisure time in hours of adults who have children under the age of 18 years and adults who do not have children under the age of 18 years. A random sample of 39 adults with children under the age of 18 years result in a mean daily leisure time of 4.2 hours with a standard deviation of 2.18 hours. A random sample of 42 adults with no children under the age of 18 years result in a mean daily leisure time of 5.5 hours with a standard deviation of 2.46 hours. Test the claim that adults with children under 18 have less time than without children under 18 at 5% significance level.

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A: Given: X = entrance exam scores X is Normally distributed Mean of X = 558 Standard deviation of X =…

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Q: Vhich distribution is used to construct an interval estimate of a population standard deviation?

A: Which distribution is used to construct an interval estimate of a population standard deviation?

Q: At 5% level of significance, what can you conclude about the average highest recorded wind speed…

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Q: A fire department in a rural county reports that its response time to fires is approximately…

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A: Solution: From the given information, σ=1,612 hours and n=332.

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A: From the given information, the mean is 114.8 and the standard deviation is 13.1.

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A: From the provided information, Mean (µ) = 14.3 Standard deviation (σ) = 3.2

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A: Answer Calculation:1. Calculate the z-score using the formula:      where:   - is the value we want…

Q: The amount of time students study for an exam follows a normal model with a mean of 6 hours and a…

A:

Q: statewide, social workers average 10.2 years of experience. In a random sample, 203 social workers…

A: State the hypotheses.

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A: Given : Let X : Number candy that they sell in a given day           μ = 8 million i.e   Mean (μ) =…

Q: for a particular diamond mine ,80% of all the diamonds fail to qualify as gemstones grade. a random…

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A:

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Q: The heights of men aged 20 to 29 are normally distributed with a mean of 69.2 inches and a standard…

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Q: study indicates that​ 18- to​ 24- year olds spend a mean of 115 minutes watching video on their…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

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Q: 20% of drivers don't use turn signals, observed of 140 cars.  What is the standard deviation of…

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Q: Draw the normal curve. Suppose that the amount of time it takes the Bureau of Internal Revenue…

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A:

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A: Suppose μ1, μ2 are the true mean heights of American students and non-American students,…

Q: Small newborn seal pups have a lower chance of survival. Suppose the length of pups was found to…

A: Let X be the length of the pup.Given that, X follows a normal distribution with mean of µ=29.5…

Q: Suppose the scores of students on an exam are normally distributed with a mean of 558 and a standard…

A:

Q: Response time is an important statistic for measuring the effectiveness of a fire department, and is…

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A:

Q: Is this unusual?.

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Q: Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean…

A: The detailed solution is as follows below:

Q: Suppose that a recent article stated the mean time spent in jail by a first-time convicted burglar…

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.