A recent survey of gasoline prices indicated that the national average was $4.098 per gallon. The Dallas Automobile Club claimed that gasoline in Texas was significantly lower than the national average. A survey covering 10 different suburbs in Dallas found the average price of gasoline to be $3.924 per gallon with a population standard deviation of $0.053. What critical value should be used to test the claim using a = 0.01?

Q: A bottling company produces bottles that hold 10 ounces of liquid. The company gets complaints that…

A: Given that: μ=10 Number of samples: n= 24 Average of the liquid: x=9.8 standard deviation: σ=0.3

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

A: x¯=4.5 poundsσ=0.7μ=4.4n=200α=0.01

Q: A used car dealer says that the mean price of a​ three-year-old sports utility vehicle is ​$20,000.…

A:

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 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: per day for Filipino female adolescents ages 14 to 18 years old is 75 grams. A researcher conducted…

A: Given n=25 Mean=75 Xbar=81 S=10 Alpha=0.05

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

A: Given :

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

A: We have given that  Sample size n =350 Sample mean = 8745  Population standard deviation =1200

Q: The average American consumes 98 liters of alcohol per year. Does the average college student…

A:

Q: The producer of a certain medicine claims that their bottling equipment is very accurate and that…

A:

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

A: Note: Hey there, here degrees of freedom is 91. In order to find the p-value, the “critical value…

Q: "According to Dietary Goals for the US (1977), high sodium intake may be related to ulcers, stomach…

A: Claim : the average sodium content for a single servings of noodles is less than 220 milligrams.

Q: In a certain city, the average 20- to 29-year old man is 69.8 inches tall, with a standard deviation…

A: For an average 20-29 year old man: mean = 69.8 standard dev = 3.2 For an average 20 - 29 year old…

Q: A survey recently reported that the mean national annual expenditure for inpatient and outpatient…

A: To test:H0:μ=5423H1:μ>5423

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: At the 0.05 level of​ significance, is there evidence that the mean life is different from 7,543…

A: Solution: Given: Sample mean is = x= 7243 and the known population standard deviation is σ = 1080…

Q: Use a 10% significance level to test the claim that the standard deviation of birth weights of girls…

A:

Q: The credit card balances on 1,000 accounts at the Jefferson Valley Bank have a mean of $760 and a…

A: mean = 760 s = 120 n = 1000

Q: In a certain city, the average 20- to 29-year old man is 72.5 inches tall, with a standard deviation…

A: From the provided information, The height of men is normally distributed with mean (µ) = 72.5 inches…

Q: A telecommunications company claims that households receive an average of 40 telephone calls per…

A: From the given information, μ=40 calls σ=5 callsn=35x=36α=0.10

Q: The manufacturer of the X-15 steel-belted redial truck tire claims that the mean mileage the tire…

A: Note: Hi there! Thank you for posting the question. As your question have posted multiple questions,…

Q: In a certain​ city, the average​ 20- to​ 29-year old man is 69.6inches​ tall, with a standard…

A: Consider a random variable X which represents the height of 20 to 29 year-old man. The average…

Q: The average farm size in the United States is 444 acres. A random sample of 40 farms in Oregon…

A: Given :  μ = 444 σ = 52 x¯ = 430 n = 40 α = 0.05 Hypothesis : H0 : μ = 444 H1 : μ ≠ 444

Q: A trucking company determined that the distance traveled per truck per year is normally​…

A: Given information- Mean weight of the bears, µ = 80 thousand miles Population standard deviation, σ…

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

A: It is given that the population standard deviation is $1,200 and sample mean is $8,757 and sample…

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

A:

Q: The heights of American men are normally distributed with a mean of 65.3 inches and a standard…

A: We have given that  Mean(µ) = 65.3Standard deviations (σ) = 2.6X ~ N (µ, σ )= N(65.3, 2.6) z-score…

Q: The advertising budgets of small stores in Los Angeles is normally distributed with a mean of $5,400…

A: It is given that mean and standard deviation are $5,400 and $2,100, respectively.Let the variable X…

Q: Does the average Presbyterian donate a different amount of money compared to the average Catholic in…

A: Given  α=0.10 For Presbyterian : n1=60x¯1=28s1=9 For Catholic : n2=59x¯2=30s2=15

Q: The credit manager of a department store chain believes that the average age of charge-account…

A: Given two problems related to hypothesis testing. We have to solve the problems as indicated.

Q: The mean annual tuition and fees for a sample of 16 private colleges was $37000 with a standard…

A: It is given that n is 16, sample mean is 37,000, sample standard deviation is 5,000 and the…

Q: A survey of 16 energy drinks noted the caffeine concentration of each drink in milligrams per ounce.…

A: We have given that  Sample size n=16

Q: Is a weight loss program based on exercise just as effective as a program based on diet? The 50…

A: As per our policy we can answer only first 3 sub-parts. If you want solution for other parts, make…

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

A: Solution: Let X1 be the attendance on Tuesday evening, X2 be the attendance on Wednesday, n1 be the…

Q: Consider babies born in the "normal" range of 37-43 weeks gestational age. Extensive data support…

A: The standard normal variable Z is defined as, Z = (X – µ)/σ, where µ is the mean of the random…

Q: The heights of English men are normally distributed with a mean of 71.2 inches and a standard…

A: Empirical rule: 68% of all possible observations lie within one standard deviation from the mean.…

Q: In the past, patrons of a cinema complex have spent an average of $5.25 for popcorn and other…

A: Given Information: In the past, patrons of a cinema complex have spent an average of $5.25 for…

Q: A manufacturer of dry cells claimed that the life of their cells is 24.0 hours. A sample of 10 cells…

A:

Q: Are serial killers more introverted than the general population? A sample of 14 serial killers…

A:

Q: as part of your work for the environment awareness group. you want to test a claim that the mean…

A:

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

A:

Q: AARP claims the average annual expenditure for Americans age 50+ on restaurant food in 2008 was…

A: Given: n=32, μ=$2130, x=$1945, σ=$800 The hypothesis is, H0:μ=$2130Ha:μ<$2130 This corresponds to…

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

A:

Q: An employer claims that full time employees have a mean income of $35,000. A sample of 200 employees…

A:

Q: It is claimed that the average household in Thunder Bay uses more than 1170 kWh of electricity each…

A:

Q: It is claimed that the average weight of a bag of the biscuit is 250 grams with a standard deviation…

A: We have the, Null Hypothesis(H0): μ=250, i.e the average weight of a bag of the biscuit is…

Q: The manufacturer of the X-15 steel-belted redial truck tire claims that the mean mileage the tire…

A: Hi! Thank you for the question As per the honour code, We’ll answer the first question since the…

Q: In a certain city, the average 20- to 29-year old man is 69.8 inches tall, with a standard deviation…

A: For man:mean(μ)=69.8standard deviation(σ)=3.0and X=75For woman:mean(μ)=64.3standard…