A cigarette manufacturer claims that its brand of cigarette contains on the average 5mg of tar and more than that. The Consumer Protection Commission tested that claim by taking a random sample of 25. They found that the average tar content was 6 mg with a standard deviation 2 mg. Test the hypothesis.

Q: In a multiple-choice examination in Chemistry, students Mae and Julie received scores of 82 and 65,…

A: We have given that.   X~N( μ , ?^2 )   μ = , ? =   Z-score =( x - μ )/?

Q: The Medical Rehabilitation Education Foundation reports that the average cost of rehabilitation for…

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Q: What proportion of trucks can be expected to travel between 38,000 and 62,000 miles in the year?

A: Normal distribution is also known as the Gaussian distribution . It is widely used to make complex…

Q: what would the mean and standard deviation of the sample proportion ˆp be?

A: Let X be Pennsylvanians who have a high school diploma Given, n = 225 p = 0.83

Q: To compare the braking distances for two types of tires, a safety engineer conducts 35 braking tests…

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Q: A one-sample z-test was conducted in which the sample mean was 76, the population mean was 82, the…

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Q: If you have 100 people in your sample, what would be the degrees of freedom you use to calculate the…

A: Given, n=100 Degree of freedom(df)=?

Q: A sample of 23 provided a sample mean of 158 and a sample standard deviation of 20. Find the value…

A: Given that Sample size n = 23 Sample mean = 158 Sample SD = 20

Q: A test to measure the gullibility of college students is designed to have a mean of 70 and a…

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Q: he average American consumes 95 liters of alcohol per year. Does the average college student consume…

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Q: A tire manufacturer advertises that their tires last 40,000 miles. A customer questions  the claim…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: Calvin, president of the company that makes Cocoa Bombs cereal, claims the weight of a box of Cocoa…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: You may need to use the appropriate technology to answer this question. Suppose Michigan State…

A: Givensample size(n)=100Mean(x)=51286standard deviation(s)=5200α=0.01

Q: In a random sample of 35 NFL games the average attendance was 68,729 with a standard deviation of…

A: Given: Big 10 Conference football games:   NFL games :

Q: If the standard deviation of sample A  is 5 and the standard deviation of sample B  is 12, what is…

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Q: In a recent poll, the Gallup organization found that 45% of adult Americans believe that the overall…

A: Binomial distribution:A random variable Y denoting the number of successes in n trials for…

Q: Given a sample mean of 94.3, a sample standard deviation of 8.4 and a sample size of 6, test the…

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Q: throughout America and decides to focus on the height data, given in meters, which are repro…

A: Given data :  Height of skyscrapers ( meters) 107.5 108.2 133.6 151.4 155.8 149…

Q: The Cpa practice advisor reports that the mean preparation fee for 2017 federal income tax returns…

A: From the provided information, Mean (µ) = $273 Standard deviation (σ) = $100 X~N (273, 100) Here X…

Q: The Medical Rehabilitation Education Foundation reports that the average cost of rehabilitation for…

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Q: With a sample of 62, a population mean of 29, and a standard deviation of 9, what is the standard…

A: Givensample size(n)=62population mean(μ)=29standard deviation(σ)=9

Q: The quality-control manager at a light bulb factory needs to determine whether the mean life of a…

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Q: (a) Compute the sample standard deviation for the number of breweries east of the Mississippi River.…

A: Given: State No. of breweries Georgia 22 Illinois 52 Kentucky 13 Maine 38 Maryland 23…

Q: Assume the sample standard deviation is s=10, what do you conclude?

A: here given, sample mean = 87 n = 25 sample standard deviation  = 10

Q: 4. A cigarette manufacturer claims that its brand of cigarette contains on the average 5mg of tar…

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Q: The U.S. Department of Transportation provides the number of miles that residents of the 75 largest…

A: There are two independent populations. Those which are named as Buffalo residents and Boston…

Q: The National Health Statistics Reports dated Oct. 22, 2008, stated that for a sample size of 277…

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Q: The reading speed of second-grade students is approximately normal, with a mean of 90 words per…

A: a) The probability that a randomly selected student will read more than 95 words per minute is…

Q: Given that the population standard deviation equals 273 and the sample size consists of 741…

A: Given information- Population standard deviation, σ = 273 Sample size, n = 741 We have to find the…

Q: A retailer believes that its new advertising strategy will increase sales. Previously, the mean…

A: Given that A retailer believes that its new advertising strategy will increase sales. Previously,…

Q: Find the sample standard deviation of these values. Round to the

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Q: An IT consultancy in Singapore that offers telephony solutions to small businesses claims that its…

A: Given: Sample sizen=25Sample meanx¯=70.2Sample standard deviations=8.4

Q: If the Standard Error SE( y ) is 1.299 and if the sample standard deviation is 4.87, what is the…

A: It is given that S.E(mean) = 1.299 Sample SD s = 4.87

Q: In determining automatic mileage ratings, it was found that the mog in the city for a certain model…

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Q: Allan, a Grade 12 senior high school student, wants to estimate the average number of students who…

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Q: The inspection division of the Lee County Weights and Measures Department is interested in…

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Q: The sample standard deviation is a measure of what?

A: The sample standard deviation is a measure of spread of scores within a sample data.

Q: You may need to use the appropriate technology to answer this question. Suppose Michigan State…

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Q: If the population standard deviation is 20 and the sample size is 25, then what is the value of the…

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Q: A report from the Illinois Department of Wildlife indicates that when a car and deer collide, there…

A: Given: 40 deer fatalities per 100 collisions between a car and a deer

Q: if you have a population standard deviation of 19 and a sample size of 4, what is your standard…

A: Given,standard deviation (σ)=19sample size(n)=4

Q: The Chancellor wants you to calculate the sample size needed with a margin of error of 15, 99%…

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…

Q: A consumer protection group suspects that a particular 285-gram packages of tofu actually weighs…

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Q: A researcher was interested in comparing the amount of time spent watching television by women and…

A: A researcher was interested in comparing the amount of time spent watching television by women and…

Q: The General Electric Company clams that the life of LED light bulbs are has a mean life of 500 hours…

A: Given : Claim :  Life of LED light bulbs are has a mean life of 500 hours  S.D (σ) = 50 hours Sample…

Q: For a hypothesis test that compares the standard deviations (SD) of two contexts, how is the test…

A: Hypothesis test is used when determine (with conditions )the population parameter from the given…

Q: The instruction manual for an IKEA bookshelf claims that it will take 2 people 41 minutes to…

A: The Null hypothesis H0: μ = 41. Alternative hypothesis Ha: μ <41 Here, α =0.10 Since population…

Q: sample of 25 cappuccinos shows a mean of 42.1 oz of espresso and a standard deviation of 0.38 oz. A…

A: Given: Sample size, n = 25 Sample mean,  = 42.1 Standard deviation, s = 0.38

Q: Assuming the sample mean and standard deviation are indicative of the class as a whole, in what…

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