A major car manufacturer wants to test a new catalytic converter to determine whether it meets new air population standards. The mean emission of all converter of this type must be less than 20 parts per million of carbon. 10 converters are manufactured for testing purpose and their emission levels are measured with a mean of 17.17 and a standard deviation of 2.98. Calculate the appropriate test statistic to test the hypotheses.

Q: The physical plant at the main campus of a large state university receives daily requests to replace…

A: We want to find the probability (%) P(49<X<79)= ?  X~N(μ=49,σ2=102)

Q: In a mid-size company, the distribution of the number of phone calls answered each day by each of…

A: Given that the distribution of the number of phone calls answered each day by each of the 12…

Q: an oceanographer claims that the mean dive duration of a north atlantic right whale is 11.5 minutes.…

A: From the given information, Sample size n =34 the Sample mean, x̅=12.2 minutes the Sample standard…

Q: The physical plant at the main campus of a large state university recieves daily requests to replace…

A: Given: X~N(μ,σ)μ=64σ=10

Q: According to the Annual survey of drugs expenditure in country X, the annual expenditure for…

A: Given, x=745σ=300n=60α=1-0.99=0.01 i). The hypothesis to be tested is obtained as-…

Q: Walleyes found in lake Windermere have a mean length of 18.4 inches with a standard deviation of 4.2…

A:

Q: On their website, a property management company states that the mean monthly rent for apartments on…

A: a) The test hypotheses are: Null hypothesis: H0: μ = 700 Alternative hypothesis: H1: μ < 700

Q: The physical plant at the main campus of a large state university recieves daily requests to replace…

A: Solution: Let X be the number of daily requests. From the given information, X follows normal…

Q: A tire manufacturer has been producing tires with an average life expectancy of 26,000 miles. Now…

A: As per our guidelines we can solve first three sub part of question and rest can be reposted.…

Q: A tire manufacturer has been producing tires with an average life expectancy of 26,000 miles. Now…

A: Solution: n= 8 Sample size  μ= 26  Population mean  x (x-x) (x-x)2 28 1.25 1.5625 27 0.25…

Q: A factory manufacturing light emitting diode LED bulbs claims that their light bulbs last for 50,000…

A: A confidence interval is an inference method which gives the range of plausible values of the…

Q: The mean annual income of certified welders is normally distributed with a mean of $50,000 and a…

A: Solution: The shipbuilding association wishes to find out whether their welders earn more or less…

Q: According to a dietary study, high sodium intake may be related to ulcers, stomach cancer, and…

A:

Q: Amil zakat is investigating the effectiveness of transporting rice for distributed in the city of…

A: For Old Car : Mean , x¯1 = 75 kgStandard deviation, σ1 = 12Sample size, n1 = 150   For New Car :…

Q: The average standard deviation of the waiting time for a single queue is 4.7 minutes. The average…

A: The hypotheses for the test are given below: Null hypothesis: H0: σ=4.67. Alternative hypothesis:…

Q: A sample of assistant professors on the business faculty at state-supported institutions in Ohio…

A: It is given that the mean is 72000 and the standard deviation is 3000.

Q: In a mid-size company, the distribution of the number of phone calls answered each day by each of…

A: Solution: Let X be the number of phone calls answered each day by each of the 12 receptionists is…

Q: sample of assistant professors on the business faculty at state supported institutions in Ohio…

A: # Given : mean salary of assistance professor =$32000 and standard deviations=$3000  to find…

Q: When Brooklyn commutes to work, the amount of time it takes her to arrive is normally distributed…

A: Given that.   X~N( μ , ?^2 )   μ=54     , ?=4   Z-score =( x - μ )/?

Q: A hospital administrator believes that the standard deviation of the number of people using…

A:

Q: At the 0.05 level of significance, is there evidence that the mean life is different from 375hours?

A: Here sample size n =64 Population standard deviation = 100 hours Sample mean = 350 hours Here claim…

Q: A manufacturer of air conditioners seeks to ensure that their air conditioners are efficient enough…

A: GivenMean(x)=7000standard deviation(σ)=10000sample size(n)=63α=0.01

Q: On a science assessment test, the scores of a random sample of 22 eighth grade students have a…

A: The provided information are:

Q: Major car manufacture wants to test a new catalytic to determine whether it meets new air pollution…

A:

Q: A tire manufacturer has been producing tires with an average life expectancy of 26,000 miles. Now…

A: Given that a tire manufacturer producing tire with an average life expectancy of μ=26 ( in thousand…

Q: A job placement director claims that the average starting salary for nurse is $26000. A sample of 18…

A: Given,sample size(n)=18sample mean(x¯)=25620standard deviation(s)=680α=0.05

Q: A tire manufacturer claims that the mean life of its tire is 75,000 miles. The me a sample of 50…

A: We have given that Mean(µ) = 75000 Sample mean(x̅) = 74200 Sample size (n) = 50 Standard…

Q: A soft drink vending machine is adjusted so that on average, it will automatically dispense 200 mL…

A: Given,sample size(n)=35sample mean(x¯)=195population standard deviation(σ)=14α=0.05

Q: According to the Annual survey of drugs expenditure in country X, the annual expenditure for…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: Suppose that a manufacturer of laptop batteries claims that his product last more than 950 hours.…

A: Given data : sample size, n = 45 sample mean, x̄ = 925.0 sample standard…

Q: The physical plant at the main campus of a large state university receives daily requests to replace…

A: We want to find the probability by using emperical rule

Q: The distribution of average wait times in drive-through restaurant lines in one town was…

A:

Q: According to the Annual survey of drugs expenditure in country X, the annual expenditure for…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: A quick survey of peanut butter prices had standard deviation and mean of $0.26 and $3.68,…

A:

Q: The police department of a U.S. city reported that the mean number (μ) of auto thefts per…

A:

Q: In some mining operations, a byproduct of the processing is mildly radioactive and release of these…

A: GivenMean(x)=5.39standard deviation(s)=0.77sample size(n)=40α=0.01

Q: A job placement director claims that the average starting salary for nurse is $25000. A sample of 15…

A:

Q: A sports science group claims that due to improved training methods, professional cyclists burn a…

A: a)   Denote μ as the mean number of calories professional cyclists burn is less than 6000.

Q: According to some studies, a vacuum cleaner uses an average of 46 kilowatt hours per year. If a…

A: From the given information we conduct T test for one mean.

Q: The sample mean weight of 200 adult vulturine parrots was measured to be 734.2 grams, with a…

A: Given  x bar = 734.2s = 15.7n = 20 The 90% CI is given by

Q: The physical plant at the main campus of a large state university recieves daily requests to replace…

A: Given: μ=63σ=5

Q: A 7,000-seat theater is interested in determining whether there is a difference in attendance…

A:

Q: The sample mean weight of 65 adult African elephants was measured to be 14,325.62 pounds, with a…

A: Answer:-  Option C is the right option.

Q: The average cost of tuition plus room and board for a small private liberal arts college is reported…

A:

Q: A fast-food franchiser is considering building a restaurant at a certain location. According to a…

A: Denote μ as the population mean number of pedestrians passing the location per hour.   It is needed…

Q: On average, a flight reservation center can handle 190 customer calls per day with a standard…

A: The empirical rule, also referred to as the three-sigma rule or 68-95-99.7 rule, is a statistical…

Q: The amount of time a certain brand of light bulb lasts is normally distributed with a mean of 1200…

A: Let X denote the amount of time a certain brand of light bulb lasts. Given that X follows N(mean =…

Q: A company which produces batteries claims that the life expectancy of their batteries is 90 hours.…

A: Given that, Population mean (μ) = 90 sample mean (x¯) = 87 sample size (n) = 40 population standard…

Q: The physical plant at the main campus of a large state university recieves daily requests to replace…

A: From the provided information, Mean (µ) = 63 Standard deviation (σ) = 8 Using empirical rule,…

Q: For a sample of 60 women taken from a population of over 5,000 enrolled in a weight- reducing…

A: Given, n = 60 x¯ = 101, s = 42, α=0.02