An insurance company claims that the average automobile on the road today is less than 6 years old. A random sample of 15 cars had a average age of 5.4 years with a sample standard deviation of 1.1 years. Assume the population is normally distributed. Test the claim at the α=.05 significance level by comparing the calculated t-score to the critical t-score.

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Q: c. Find the P-value. P-value = (Round to four decimal places as.needed.)

A: The degrees of freedom is, df=n-1=49-1=48 The degrees of freedom is 48.

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Q: A simple random sample of 36 men from a normally distributed population results in a standard…

A: Solution: From the given information, the sample standard deviation is S=8.4 beats per minute,…

Q: A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola…

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Q: A simple random sample of 35 men from a normally distributed population results in a standard…

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Q: The weights of discarded plastic from a sample of 62 households have a mean weight of 1.911 lbs. The…

A: From the provided information, Sample size (n) = 62 Sample mean (x̅) = 1.911 lbs Standard deviation…

Q: A simple random sample of 36 men from a normally distributed population results in a standard…

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Q: Does the average Presbyterian donate less than the average Catholic in church on Sundays? The 49…

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Q: Compute the statistic Find the P value. State the conclusion.

A: n=32, s=11.8, σ=10,ɑ=0.05

Q: The mean SAT score in mathematics is 549. The standard deviation of these scores is 50. A special…

A: GivenMean(x)=569standard deviation(σ)=50sample size(n)=18α=0.10

Q: A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola…

A:

Q: entry the null and alternative hypotheses. Choose the correct answer below. . Ho: o= 10 beats per…

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Q: A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola…

A: Givensample size(n) = 30Mean(x)=48.8stadnard deviation(σ)=7.6α=0.06

Q: A coffee packaging plant claims that the mean weight of coffee in its containers is at least 32…

A: Introduction: Denote μ as the true mean weight of coffee in the containers packed by the coffee…

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Q: The average of the grades obtained in an exam shows a normal distribution with 56 and a standard…

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A: Population mean()=6.5sample size(n)=210sample mean()=6.6standard deviation()=0.6significance…

Q: An automobile manufacturer claims that its car has a 37.9 miles/gallon (MPG) rating. An independent…

A: population mean()=37.9sample size(n)=140Mean()=38.2standard deviation()=1.2significance level()=0.01

Q: a. Identify the null and alternative hypotheses. Choose the correct answer below. O A. Ho: o= 10…

A: a) The null and alternative hypotheses are: H0:σ =10 beats per minute H1:σ ≠ 10 beats per minute

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A: Given  X=1.6, n=30, mean=10.4 Standard deviation=s=5.3 We want to find Z score

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Q: Suppose a random sample of adult women has a sample mean height of x¯=64.3 inches, with a sample…

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Q: It was reported that last year the average price of gallons of gasoline in a city X was $3.15. This…

A: Ho:u=3.15 vs H1: u<3.15 xbar=3.10, n=50, σ=0.15

Q: A Simple random sample of 35 men from a normally distributed population results in a standard…

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Q: A car company says that the mean gas mileage for its luxury sedan is at least 21 miles per gallon.…

A: Denote μ as the true mean gas mileage of luxury sedan.

Q: What type of test would be used?   A. Z test   B. Z test difference between two means   C. T test…

A: The sample size is large (greater than 30) but the population standard deviation is unknown…

Q: A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it…

A: Method: Use z test statistic to calculate the test value

Q: An engineer has designed a valve that will regulate water pressure on an automobile engine. The…

A: From the provided information,Sample size (n) = 7Sample mean (x̄) = 7.0Sample standard deviation (s)…

Q: A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola…

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Q: What can be concluded at the the αα = 0.10 level of significance?

A: Given that  The average American consumes 86 liters of alcohol per year Population mean (μ) = 86…

Q: A simple random sample of 37 men from a normally distributed population results in a standard…

A: Given that sample size n = 37 and sample SD s = 11.4 Claim: the pulse rates of men have a standard…

Q: A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola…

A: Assume the population is normally distributed and the population standard deviation is 6.9…

Q: After a lot of hard work, a studio releases a new video game. The studio believes that the game will…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…