Is there a difference between middle-class families and working-class families in terms of maintaining contact with relatives? A sample of 35 middle-class families reported an average of 7.3 visits per year with close kin with a standard deviation of 0.3, while a sample of 48 working-class families averaged 8.2 visits with a standard deviation of 0.5. If the estimated standard error of the differences is equal to 0.65, is the difference significant? Please select a significance level, conduct a t test for independent means by using the five steps of hypothesis testing, and summarize your conclusions in a sentence or two.

Q: Suppose the exam average in a class is 82% with a standard deviation of 6. What proportion of…

A:

Q: The U.S. Center for Disease Control reports that the mean life expectancy was 47.6 years for whites…

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Q: Suppose that the distribution of touchdowns (in football) is normally distributed with a mean of 250…

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Q: What does having a higher standard deviation means?

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Q: An IQ test has a mean of 97 and standard deviation of 10. Which is more unusual, an IQ of 87 or an…

A: Given data  μ = 97σ = 10which score is more unusual? 87 or 110?

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A:

Q: The U.S. Center for Disease Control reports that the mean life expectancy was 47.6 years for whites…

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A: given data normal distributionσ = 3.595% of students got score between 28 and 42.mean = ?

Q: In a recent study of 35 Grade5 students, the mean number of hours per week that they played video…

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Q: An economist would like to estimate the mean amount of money that a family spends to within $45. If…

A: GivenMargin of Error(E)-45standard deviation(σ)=190α=1-0.93=0.07α2=0.035zα2=1.8119      (from z…

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Q: A student earned a 75 on a calculus exam, and she earned a 68 on a linear algebra exam. The calculus…

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Q: Give two situations in which comparing two population standard deviations would be important

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Q: Define the term standard deviation?

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Q: A sample of 77 subjects went on a low-carbohydrate diet for six months. At the end of that time, the…

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Q: What is the lowest standard deviation value ?

A: Standard deviation; The standard deviation indicates by how much each observation differs from a…

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A:

Q: 1900 in a certain county. Of the 124 whites, the mean life span was 45.3 years with a standard…

A: Given Data : For Sample 1 x̄1 = 45.3 s1 = 12.7 n1 = 124 For Sample 2…

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Q: In a recent study, the CDC reported that diastolic blood pressures of adult women in the United…

A: Given that,  Mean = 92 Standard deviation = 9.25 , and X = 60   Let X be a diastolic blood pressure…

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.