8 A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it needs to be replaced A survey of owners of that tire design is conducted. From the 28 tires surveyed, the mean lifespan was 46,500 miles with a standard deviation of 9,800 miles. Using alpha = 0.05, is the data highly inconsistent with the claim (conduct a hypothesis test- write out all the steps)?

Q: An aim of this study was to evaluate if there is a difference after the GFCF (gluten-free,…

A: Given that: Mean of paired difference, d¯=1 Standard deviation of paired difference, sd=3…

Q: The manufacturer of a particular brand of tires claims they average at least 50,000 miles before…

A: Given : Pop. standard deviation (σ) = 8000 Sample size = 21 Sample mean (X) = 41500 α = 0.05

Q: Previous research has shown that the mean number of ballpoint pens Americans use per year is 4.3…

A:

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

A: Given : sample size, n = 27 sample mean, x̄ = 45700 population standard…

Q: A tourist agency in Manila claims the mean daily cost of meals and lodging for a family of 4…

A:

Q: The weight of crabs is normally distributed with mean 28.5 ounces and standard deviation of 3…

A:

Q: The weights of weekly plastic waste from a random sample of 50 American households resulted in a…

A: Given,sample size(n)=50sample mean(x¯)=1.91standard deviation(σ)=1.07α=0.05H0:μ=1.8H1:μ>1.8

Q: waster than in untreated water. Use the level of significance=0.05 Sample1=untreated water,…

A: Given Data : For Sample 1 x̄1 = 7.8 s1 = 1.4 n1 = 5 For Sample 2…

Q: Tesla tires claim that its high-class tire averages at least 60,000 miles before replacement. It is…

A:

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

A:

Q: Dougall compared the resting heart rate of average healthy citizens and soldiers suffering from…

A: Given that,Dougall compared the resting heart rate of average healthy citizens and soldiers…

Q: A marketing firm wants to estimate the difference in the mean amount of caffeine in two brands of…

A:

Q: A particular brand of tires claims that its deluxe tire averages at least 55,000 miles before it…

A: Given :

Q: Dunlop Company conducts tests on tires life. For a particular tires, the standard deviation is 6000…

A: The two values are 92,000 and 68,000.

Q: Abbot Milk Company conduct a study about child growth and the relationship with milk consumption…

A:

Q: Do shoppers at the mall spend the same amount of money on average the day after Thanksgiving…

A: x1 = 139 n1 = 48 s1 = 33   x2 = 140 n2=43 s2=36

Q: The manufacturer of a particular brand of tires claims they average at least 50,000 miles before…

A: Solution : Given data is Population Mean (μ) =50000 Sample Standard Deviation (s) = 8000 Sample Size…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 101.7 and a standard…

A: GivenMean(μ)=101.7standard deviation(σ)=16.8

Q: A large national study conducted in 2004 found that the mean systolic blood pressure for males aged…

A: From the provided information, Sample size (n) = 200 Sample mean (x̅) = 136 Standard deviation (s) =…

Q: Dunlop Company conducts tests on tires life. For a particular tires, the standard deviation is 6000…

A: From the provided information, Standard deviation (σ) = 6000 kilometers The 68% of tires life failed…

Q: It was found that the cholesterol content of a bread is normally distributed with an average of 200…

A:

Q: In the agricultural department, a test was conducted on a new variety of corn. The new corn was…

A: Given: n = 50 Xi = 50,   i = 1, 2, 3, ...50 Standard deviation σ = 10 Formula Used: Sample mean X =…

Q: Tesla tires claim that its high-class tire averages at least 40,000 miles before replacement. It is…

A: Population mean, μ = 40,000 Population standard deviation, σ = 10,000 sample mean, X = 46,200   Null…

Q: Normal blood sugar levels are less than 100 mg/dL after fasting for at least eight hours. A sample…

A:

Q: restaurant association says the typical household in the United States spends a mean amount of $3095…

A: Given that Clam : The typical household in the United States spends a mean amount of $3095 per year…

Q: An economist studying fuel costs had a suspicion that the median price of gasoline in his state was…

A: Given  x¯=3.04s=0.39α=0.01 test statistic=0.65 p-value =0.260

Q: a. Find the null and alternative hypothesis b. What does the random variable X represent? c. State…

A: Let μ be the population mean lifespan of tires. Given that, Population mean (μ)=50,000…

Q: A professor at a local university noted that the exam grades of her students were normally…

A: The mean is 73 and the standard deviation is 11.

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

A: Solution

Q: The average American consumes 93 liters of alcohol per year. Does the average college student…

A:

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

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…

Q: An engineer would like to design a parking garage in the most cost-effective manner. He reads that…

A: Given information Hypothesized mean µ = 76.4 inches Sample size (n) = 100 Mean x̅ = 77.1 inches…

Q: The time needed for college students to complete a certain maze follows a normal distribution with a…

A: t-test: If the given sample size is less than or equal to 30 and sample standard deviation is given.…

Q: The manufacturer of a particular brand of tires claims they average at least 50,000 miles before…

A:

Q: The manufacturer of a particular brand of tires claims they average at least 50,000 miles before…

A: Given: n=21 Mean X¯=42500 Standard Deviation s=8000 Level of significance α=0.05

Q: A sample of Alzheimer's patients are tested to assess the amount of time in stage IV sleep. It has…

A:

Q: A random sample of 78 ninth grade student's scores on a national mathematics assessment test has a…

A: Answer: Using the given data, Sample size (n) = 78 Sample mean x¯ = 264 Population standard…

Q: A few years ago, noon bicycle traffic past a busy section of campus had a mean of $\mu$ = 300.  To…

A: The t-test is used when the population standard deviation is unknown. It may also be used for…

Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…

A:

Q: The manufacturer of a particular brand of tires claims they average at least 50,000 miles before…

A: The objective of this question is to test the manufacturer's claim that the tires last at least…

Q: An organizational psychologist conducted a study to see whether upgrading a company's older computer…

A: Given Mu=120 Standard deviations=20 n=45

Q: The manufacturer of a particular brand of tires claims they average at least 50,000 miles before…

A: Given information Population mean µ = 50000 Sample size n = 21 Sample mean x̅ = 46500 Standard…