The average score of a random sample of 87 senior business majors at a university who took a certain standardized test follows a normal distribution with a standard deviation of 28. Use Excel to determine a 90% confidence interval for the mean of the population. Round your answers to two decimal places and use ascending order. Score

Q: In a random sample of five mobile​ devices, the mean repair cost was ​$60.00 and the standard…

A: The summary of statistics is, x¯=60,s=11,n=5 The degree of freedom is, df=n-1   =5-1   =4 Critical…

Q: The average entrance exam score of a random sample of 35 first year students of CSM was 89.66 with a…

A: Given: Sample size, n=35 Sample mean,x¯=89.66Sample sd, s=18.28Confidence level=96%

Q: Use z scores to compare the given values. Based on sample​ data, newborn males have weights with a…

A: From the provided information, Newborn male have weights with mean (µM) = 3287.8 g Standard…

Q: A bottler of drinking water fills plastic bottles with a mean volume of 1001 milliliters (ml) and a…

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Q: A random sample of 50 veterinarian school applicants at a university has a sample mean score of 28…

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Q: A consumer advocacy group suspects that a local supermarket's 7-ounce packages of cheddar cheese…

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Q: A medical researcher wishes to see whether the pulse rates of smokers are higher than the pulse…

A: The hypotheses are given below: Null hypothesis: H0:µ1=µ2 Alternative hypothesis: H1:µ1>µ2 The…

Q: A magazine conducts an annual survey in which readers rate their favorite cruise ship. All ships are…

A: Given,  Sample-1)  sample size = n1 = 39  sample mean = x¯1 = 85.36 Population standard deviation =…

Q: he General Social Survey asked: “How many e-mails do you send in a day?” The results of 928…

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Q: Some manufacturers claim that non-hybrid sedan cars have a lower mean miles-per-gallon (mpg) than…

A: From the provided information,

Q: It is desired to obtain a 95% confidence interval for the mean time µ= 120 minutes to take the…

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Q: Construct a 95% confidence interval for the population mean, μ. Assume the population has a normal…

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Q: Crossett Trucking Company claims that the mean weight of its delivery trucks when they are fully…

A: From the given information, μ=5800σ=270n=50 Pa≤X¯≤b=90%PX¯≤a=5%PX¯≥b=5%

Q: A random sample of 81 credit sales in a department store showed an average sale of $75.00. From past…

A: Solution: Let X be the amount of sale. From the given information, n=81, x-bar=$75 and σ=$27.

Q: A light bulb manufacture guarantees that that the mean life of a certain type of light bulb is at…

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Q: According to a recent survey by the National Retail Federation, men spent an average of $135.35 on…

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Q: In the 2018 General Social Survey, a random sample of 1666 adults in the U.S. was asked how old they…

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Q: When preparing a national standardized test to be given to sixth graders, The Standard Test Company…

A: We have given that  Sample size n = 50 Sample mean = 135  Standard deviation = 20 95% confidence…

Q: random sample of 81 automobiles traveling on a section of an interstate showed an average speed of…

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Q: The mean SAT verbal score is 473, with a standard deviation of 96. Use the Empirical Rule to…

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Q: A group of 10 foot surgery patients had a mean weight of 240 pounds. The sample standard deviation…

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Q: Do male and female servers at Swank Bar work the same number of hours? A sample of 75 female servers…

A: We have given that  Sample sizes n1=75     , n2=75      Sample means X̄1=35      , X̄2=36…

Q: Who has the weight that is more extreme relative to the group from which they​ came: a male who…

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Q: A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A sample of…

A: Given, A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A…

Q: . Determine standard scores (z-values) of students receiving the Grade of 65. b. Determine standard…

A: Here as per POLICY I HAVE CALCULATED 3 SUBPART On the final examination in Engineering data…

Q: Do male and female servers at Swank Bar work the same number of hours? A sample of 50 female servers…

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Q: In high school X, approximately 9 percent of the students saw a certain movie on opening night. From…

A: In high school X, approximately 9 percent of the students saw a certain movie on opening night. From…

Q: According to a survey, the average times, in minutes, it took for Statistics students to complete…

A: Given data; Mean(x-bar) = 102 minutes Standard deviation (s) = 11 minutes Sample size (n) =16 As…

Q: o male and female servers at Swank Bar work the same number of hours? A sample of 45 female servers…

A: From the given information we find the solution.

Q: The average drive to work is 9.6 miles. Assume the standard deviation is 1.8 miles. If a random…

A: From the given information, x¯=9.6σ=1.8n=36

Q: A medical researcher is interested in the prenatal care received by pregnant women in inner cities.…

A: We have given that  Sample size n=20 , sample mean =4  s=1 , 95%confidence.

Q: At the 0.10 level of significance, can it be concluded that this represents a difference from the…

A: Given that Sample size n = 50 Sample mean = 9.2 Population SD = 3.2 Level of significance = 0.10

Q: high school students across the nation compete in a financial capability challenge each year by…

A: It is given that, the students who score in the top 13 percent are recognized publicly for their…

Q: The monthly In distributed, with mean of $100 standard deviation of $13. Find the probability that a…

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Q: A student has been doing well all semester, and calculates that she only needs a thirty percent…

A: 1] Total number of questions (n)=50 2] Each question with 4 possible options. 3] Passing Mark 30%…

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: Construct a 90% confidence interval for the population mean, p. Assume the population has a normal…

A: From the given information, Sample size (n) =22 Sample mean (x-bar) = 19.6 Standard deviation (s) =…

Q: According to a study, the salaries of registered nurse are normally distributed with a mean of 56310…

A: Given,mean(μ)=56310standard deviation(σ)=5038

Q: Do male and female servers at Swank Bar work the same number of hours? A sample of 65 female servers…

A: Given that  And  Which of the following does your data suggest?   Male servers work more hours…

Q: Boston Marathon: A sports statistician claims that the mean winning times for Boston Marathon…

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Q: Do male and female servers at Swank Bar work the same number of hours? A sample of 65 fernale…

A:

Q: school administrator to declare that the mean score for the​ state's eighth graders on this exam is…

A: Given that  Sample size(n) = 84 Sample mean score (x¯) = 290 Population standard deviation (σ) = 36…

Q: . A medical statistician wants to estimate average weight loss of people who are on a new diet plan.…

A: Given : Margin of error, ME = 2.0 population standard deviation, σ = 10.0…

Q: A random sample of 16 light bulbs has a mean life of 650 hours and a standard deviation of 32 hours.…

A: Mean = mu = 650 Standard deviation = sigma = 32 25.0 Sample size = 16 Therefore standard error of…

Q: What are the null hypothesis (H,) and the alternative hypothesis (H,) that should be used for the…

A: The type I error is defined is as rejecting the null hypothesis when actually it is true.  The type…

Q: Running times for 400 meters are Normally distributed for young men between 18 and 30 years of age,…

A: GivenMean(μ)=93standard deviation(σ)=6

Q: Approximately how many of the cartridges in the sample would you expect to be replaced under the…

A: Consider X as a random variable that follows the normal distribution with a mean 4302 and a standard…

Q: A magazine conducts an annual survey in which readers rate their favorite cruise ship. All ships are…

A: Given data n1=38x1¯=85.62σ1=4.55And n2=44x2¯=81.10σ2=3.97

Q: A manufacturer of car batteries claims that the life of his batteries have a standard deviation…

A: Given Sample size, n=10Sample s.d., s=14.4 months=1.2 years

Q: According to ACT, results from the 2008 ACT testing found that the students had a mean reading score…

A: Given,mean(μ)=21.4standard deviation(σ)=6.0

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.