The average salary in this city is $41,900. Is the average different for single people? 59 randomly selected single people who were surveyed had an average salary of $43,288 and a standard deviation of $9,670.  What can be concluded at the  αα = 0.01 level of significance?

Q: A college professor noted that the grades of his students in an introductory statistics class were…

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Q: Justine is an analyst for a sleep study center in a major city. She is looking to test the claim…

A: Decision based on p-value:At level of significance α, if the p-value ≤ α, then reject the null…

Q: The average salary for American college graduates is $45,900. You suspect that the average is…

A: Using excel formula for p value =T.DIST.2T(ABS(t), df)  t  = test static  df = degrees of freedom

Q: The mean annual premium for automobile insurance in the United States is $1503 (Insure.com website,…

A: Given:The provided sample mean is  = 1440 and the Sample standard deviation is s = 165, and the…

Q: if heights of 3rd graders follow a normal distribution with a mean of 52 inches and a standard…

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Q: at the time she was hired as a server at the grumney family restaurant, beth brigden was told, "you…

A: From the provided information, Population standard deviation (σ) = 3.24 Sample mean (x̄) = 84.85…

Q: Last year the records of Dairy Land Inc., a convenience store chain, showed the mean amount spent by…

A: The z-test statistic for single mean is, Z=x¯-μ0σnwhere,x¯=sample meanσ=population standard…

Q: The average salary in this city is $40,500. Is the average more for single people? 61 randomly…

A: Hey, since there are multiple subparts posted, we will answer first three question. If you want any…

Q: The mean number of eggs per person eaten in the United States is 272. Do college students eat more…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

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A: Let X be the random variable such that gas mileage in miles per gallon x̅: Sample mean of gas…

Q: Last year, the average amount that teams for the Statistics Games raised was $375. Have teams been…

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Q: Are low-fat diets or low-carb diets more effective for weight loss? A sample of 72 subjects went on…

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Q: The mean number of eggs per person eaten in the United States is 278. Do college students eat less…

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Q: The mean annual tuition and fees for a sample of 15 private colleges was $41,200 with a standard…

A: Given: n=15x¯=41200s=5300μ=38000α=0.05 The test hypothesis are, H0: μ=38000H1: μ≠38000. This is a…

Q: A national survey reports that the average number of screens (TVs, computers, tablets, and…

A: Given , Population mean = μ = 10.7 Population standard deviation = σ = 1.5 Sample size n = 35 Sample…

Q: 80 smokers were questioned about the number of hours they sleep each day. We want to test the…

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

Q: Do female college students spend more time than male college students watching TV? This was one of…

A: Let μMales be the mean time spent watching TV per day by males and μFemales be the mean time spent…

Q: A clinical researcher performs a clinical trial on 19 patients to determine whether a drug treatment…

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Q: For a study conducted by the research department of a pharmaceutical company, 245 randomly selected…

A: Given  n1=245, x̄1=17.8, s1=4.3  n2=225, x̄2=18.2, s2=3.6

Q: When 40 people used Weight Watchers for one year, their mean weight loss was 3.0 lbs and their…

A: The test hypotheses are given below: H0:μ=0 lbsHa:μ>0 lbs From the given information, the…

Q: s = $7.61. At 1% significance level, do the data provide sufficient evidence to conclude that this…

A: HERE GIVEN, A company collects information about retail prices of history books. During the year…

Q: In 2012, the mean retail price of all history books was $76.38, This year retail price for 45…

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Q: The average American consumes 86 liters of alcohol per year. Does the average college student…

A: Given that  Sample size n =12 Sample mean =91.5 Standard deviation =17 NOTE:- According to bartleby…

Q: The average American consumes 91 liters of alcohol per year. Does the average college student…

A: a.   Assume that μ is the population average consumption of alcohols for all Americans.

Q: veyed 11 randomly selected college students and found that they averaged B liters of alcohol…

A: Sample size n=11Sample mean=95.8Standard deviation=20NOTE: according to bartleby guidelines expert…

Q: ctually lower than the mean electrical engineering salary. The recruiting office randomly surveys 50…

A: Given Information: Claim:  The mean mechanical engineering salary is actually lower than the mean…

Q: For a study conducted by the research department of a pharmaceutical company, 235 randomly selected…

A: Given n1=235 n2=250 X1-bar=17.80 X2 bar=18.20

Q: Are low-fat diets or low-carb diets more effective for weight loss? A sample of 61 subjects went on…

A: given data x¯1  = 2.1s1 = 4.71n1 = 61x¯2 =3.7s2 = 5.67n2 = 63α = 0.05claim : μ1 < μ2

Q: The high school athletic director is asked if football players are doing as well academically as the…

A: Let μ and σ denote respectively the population mean and standard deviation of GPA for the student…

Q: The amount of money raised by Clayton State teams for the Statistics Games is normally distributed,…

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