According to Kaiser Family Foundation survey in 2011 and 2010, the average premium for employer-sponsored health insurance for family coverage was $15,073 in 2011 and $13,770 in 2010 (USA TODAY, September 29, 2011). Suppose that these averages were based on random samples of 250 and 200 employees who had such employer-sponsored health insurance plans for 2011 and 2010, respectively. Further assume that the population standard deviations for 2011 and 2010 were $2160 and $1990, respectively.

Q: percentage of," 2013). Consider a group of 200 people. Find the mean and the standard deviation of…

A: Let a random experiment be performed repeatedly. Let the occurrence of an event in a trial is called…

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A:

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A: It is given that the mean number of text messages sent per day is 40.9 for men, 42.0 for women. The…

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A: Given

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A: we have given that  n1=250 ,n2=250 ,xbar1=391 ,xbar2=426 ,s1=20 ,s2=44 alpha=0.05

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A: From the provided information,

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A: For Carver:mean(μ)=10.1standard deviation(σ)=2.3and score (X)=13.2For Bryant:mean(μ)=9.8standard…

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A:

Q: Suppose we have data on the ages of U.S. presidents. We also have ages for a sample of high school…

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Q: The National Center for Health Statistics reports that the average systolic blood pressure for males…

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Q: An article in the Register stated that students in the state university system take 4.5 years, on…

A: Givensample size(n)=49Mean(x)=5.1standard deviation(s)=1.2significance level(α)=0.01

Q: According to the Center for Disease Control and Prevention (CDC), the mean life expectancy in 2015…

A: Given Data Population Mean,μ = 76.3 Population Standard Deviation,σ = 15.0 sample…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A:

Q: Suppose​ 18% of​ movie-goers say that horror is their favorite movie genre. If a random sample of…

A: Obtain the mean number of movie-goers that prefer horror movie genre. The mean number of movie-goers…

Q: Do the data support your claim at the 1% level?

A: The summary of the statistics is, The type of test is right tailed test

Q: 58.6. Assume that 107 men and 244 women were sampled, and that the standard deviations were 24.3 for…

A: Given that, The Pew Internet and American Life Project surveyed 351 adults in 2019, asking them…

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A: Probability distribution: A probability distribution function is the statistical function that…

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A: Solution :  In above example a value of one of the sample change so we know that standard deviation,…

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

A: a.) The Hypotheses The hypotheses are: H0​:μW​=μNW​H1​:μW​=μNW​ b.) The Test Statistic The…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: The mean is 500 and the standard deviation is 100.

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A: Given information, It is given that the mean is 71.8, the population standard deviation is 15,…

Q: Suppose that salaries for recent graduates of one university have a mean of $24,900 with a standard…

A:

Q: Find their respective​ z-scores. Which player had the better year relative to their​ peers, Hank or…

A: Given For males, μ=4.296σ=0.907 For females μ=3.764σ=0.866

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A:

Q: According to the Bureau of Labor Statistics, the mean salary for registered nurses in Kentucky was…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A:

Q: According to data from the 2010 United States Census, 64.2% of Americans in Susanville, CA were…

A: 64.2% of Americans in Susanville, CA were male, p = 0.642 Sample size, n = 100 Among the sample, 54…

Q: Ted had the lowest ERA​ (earned-run average, mean number of runs yielded per nine innings​ pitched)…

A: According to the given information in this question We need to find the z score

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A: GivenThomas has an ERA of 2.67 and Sarah has an ERA of 2.99For males,For femalesTo find the z-score…

Q: Assume the annual day care cost per child is normally distributed with a mean of ​$9000 and a…

A:

Q: Suppose that for a certain individual credit card purchases follow a normal distribution with mean…

A: The normal distribution has a property called “68-95-99 rule” that 68% of the values lie in the…

Q: A football coach claims that the average weight of all the opposing teams’ members is 210 pounds.…

A: Consider that μ is the true average weight of all the opposing teams’ members.

Q: In one town, the number of pounds of sugar consumed per person per year has a mean of 6 pounds and a…

A: In one town, the number of pounds of sugar consumed per person per year has a mean of 6 pounds and a…

Q: According to the Center for Disease Control and Prevention (CDC), the mean life expectancy in 2015…

A: Given Data Population Mean,μ = 71.8 Population Standard Deviation,σ = 15.0 sample…

Q: Suppose the annual employer 401K cost per participant is normally distributed with a mean of $770.…

A: Let X be the random variable representing the cost per participant. Then, X~N(μ,σ2),where…

Q: Lydia Hayward is an external research consultant hired by FirstCard, a major credit card company, to…

A: Given information:Denote the population mean total credit card balance for adults 25 to 34 with a…

Q: Lydia Hayward is an external research consultant hired by FirstCard, a major credit card company, to…

A: Correct Option D) This is a right-tailed test because the alternative hypothesis is…

Q: ne year Terry had the lowest ERA (eamed-run average, mean number of runs yielded per nine inhings…

A: According to the given information in this question we need to find the z scores of both

Q: A recent study found that 69% of all adults over 50 wear sunglasses for driving. In a random sample…

A: Formula : Mean = np Standard Deviation  :

Q: One year Perry had the lowest ERA (earned-run average, mean number of runs yielded per nine innings…

A: Perry had the lowest ERA​ (earned-run average, mean number of runs yielded per nine innings​…

Q: Suppose the distribution of typing speeds in words per minute for experienced typists can be…

A:

Q: According to the U.S. Bureau of Labor Statistics, all workers in America who had a bachelor's degree…

A: Let x̄ be the sample mean  n be the sample size  Population mean μ  σ be the  population standard…

Q: A study by the National Center for Health Statistics suggested that women between the ages 20 and 29…

A: 0.33271Explanation:For the given normal distribution with μ=26.8 and σ=7.4, the required proportion…