Question 1 At a local university, a sample of 49 evening students was selected in order to determine whether the average age of the evening students is significantly different from 21. The average age of the students in the sample was 23 years. The population standard deviation is known to be 3.5 years. Determine whether or not the average age of the evening students is significantly different from 21. Use a .1 level of significance.

Q: A local church parish wants to raise money to add to their campus. In a sample from a previous fund…

A: Consider that the population standard deviations of previous campaign find contribution and current…

Q: Question 2: Studies indicate that small businesses (20-40 employees) in the U.S. spend an average of…

A: Note: According to Bartleby expert guidelines, we can answer only first question with their three…

Q: QUESTION 2 A dietitian is looking into the average weight of middle school & High school students in…

A: We have given that,  Population mean (μ) = 47.47, population standard deviation (σ) = 14.67 and…

Q: Question 3 The students in an AFDA class have a mean height of 66 inches and a standard deviation of…

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Q: Question 4 The annual commissions earned by sales representatives of a computer shop follow a normal…

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Q: QUESTION 2: 1- In order to be accepted into a top university, applicants must score within the top…

A: Given, mean(µ)=1000 Standard deviation (σ)=200 In order to be accepted into a university, applicants…

Q: Question 8 Consider this scenario:  A cereal-packing company where the content of cereal boxes must…

A: The standard error of the mean can be formulated as the possible likely distance that can take…

Q: Question 4. Suppose the mean weight of King Penguins found in an Antarctic colony last year was 15.4…

A: Given n=35 x=14.6σ=2.5μ=15.4α=0.01

Q: QUESTION 5: 1- Applying for a specific job requires obtaining the mark of 500 in the contest exam.…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Peak expiratory flow (PEF) is a measure of a patient’s ability to expel air from the lungs. Patients…

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Q: QUESTION 4 A recent study (“Snack Ads Spur Children to Eat More,” The New York Times, July 20, 2009,…

A: The sample size for children who watched a cartoon with food advertising ate(First sample) is 59,…

Q: QUESTION 5 A recent study based on 25 families showed that the average cost of education, from…

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Q: QUESTION 15 A certain machine makes electrical resistors having a mean resistance of 50 ohms and a…

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Q: When testing (at the 5% level of significance) whether the proportion of peole who are contributing…

A: Test is that whether the proportion of peole who are contributing has increased.

Q: Question 6 Suppose a Pharmaceutical company manufactures a specific drug and needs to perform some…

A: Hypothesis Testing: Hypothesis testing is a statistical inference technique that uses sample data…

Q: Question 20             Annual expenditure for prescription drugs was $838 per person in the…

A: (a) Here, the claim of the test is that the sample data support the conclusion that the population…

Q: Question 4 A college placement office conducted a survey of 100 engineers who had graduated from…

A: We have to find probability using z table.

Q: . Using the 10% significance level, can you conclude that the mean hourly earnings of both groups…

A: Given Data : For Sample 1 x̄1 = 10.60 s1 = 1.05 n1 = 20 For Sample 2…

Q: QUESTION 9 Assume the cost for an automobile repair is normally distributed with a mean of $524 and…

A: (9) Obtain the cost if the lower 7% of automobile repair charges. The cost if the lower 7% of…

Q: Imagine that the mean height for players in all Division I women's basketball programs is 69 inches…

A: We use formula  Test statistic ( Z ) = ( x̄ - μ )∕?/√n Mean = 71.2 Population standard deviation =3…

Q: QUESTION 1 A dietitian is looking into the average weight of middle school & High school students in…

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Q: The mean labour productivity (output per worker per hour, in Rand) of a random sample of 26 textile…

A: From the chi square distribution, n-1s2o2 follows chi square distribution with (n - 1) degrees of…

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

A: (1) State the hypotheses. That is, there is no evidence that the population annual expenditure for…

Q: Question 5: If birth weights in a population are normally distributed with a mean of 109 oz and a…

A: X has normal distributed. X~N(μ,σ) μ=109 oz and σ=13 oz

Q: Given a sample data set with a Variance of 6.25, what is the Standard Deviation of the data set.?

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Q: Question 4 Find a 95% confidence interval for the mean time required for an oil change at a local…

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Q: Question 3 A sample of 44 commuters in Chicago showed the average of the commuting times was 33.2…

A: "Since you have asked multiple questions, we'll solve the first question for you. If you want any…

Q: part 2 question 7 The mean systolic blood pressure is 120 and the standard deviation is 8. The…

A: To find the probability we will use Excel

Q: Question 2 It is known that the population wellbeing level of female follows a normal distribution.…

A: State the hypotheses. That is, there is no evidence to conclude that the average well being score…

Q: QUESTION 6 The temperature readings for 20 spring days in Manila are normally distributed with a…

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Q: QUESTION 14 When they started filming the first season of Mighty Morphin' Power Rangers, the…

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Q: Question 5 The heights of the 430 Candidates for the Elite Military Unit have an approximate…

A: Formula of z score is , z = x-μσ Z score is the standard normal variable with mean μ = 0 and…

Q: Question 7 The average monthly rainfall in Southern Ontario is 26 mm. If rainfall data over the year…

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Q: 8. (Topic 8) Suppose the average height of a two year old male is normally distributed with a mean…

A: We have given height of 2 year old male is normally distributed with mean =m=34.2 and sd=2.9 We have…

Q: During 2008, college work-study students earned a mean of $1478. Assume that a sample consisting of…

A: Hypothesis: H0:μ=1478H1:μ>1478 This is a right tailed test since the claim is to check that…

Q: Question three John and his friend were recently having a heated discussion about the number of men…

A: Given that, John and his friend were recently having a heated discussion about the number of men…

Q: Question 3 The average score of all sixth graders in school District A on a math aptitude exam is 75…

A: The hypothesis test used to compare the population and sample. Two types of hypothesis test, they…

Q: Consider this scenario:  A cereal-packing company where the content of cereal boxes must have a mean…

A: We have to find standrad error of the mean..

Q: John and his friend were recently having a heated discussion about the number of men living in a…

A: Given: μ=5000σ=6000n=800x¯=10000α=0.05

Q: Question 4 A statistician employed by a consumer testing organization reports that at 95% confidence…

A: Given Information : Confidence level , c = 95% ( 0.95) Population Standard deviation , σ = 1.25…

Q: QUESTION 4 A recent salary survey at a large multinational corporation was carried out. Analysis of…

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

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Q: Data from the Bureau of Labor Statistics reports that the typical manufacturing worker in Wisconsin…

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Q: Question 5: Calculate the standard deviation of the data set. Hint: 95% is two standard deviations…

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Q: QUESTION 39 The monthly expenditures on grocery shopping for all households in a town has a mean of…

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Q: Question 25:  The weights of newborn children in the United States vary according to the normal…

A: Use the One sample t test Followings are the Explanation of the question The provided sample mean is…

Q: Question 1 Consider a sample with a mean of 30 and a standard deviation of 2.5. Use Chebyshev's…

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