The grade point average of 64 students selected to test the claim that the students in the Business Department has a GPA of more than 70 was found to be 72 and the p-value was 0.0328. Find the standard deviation of the sample.

Q: On a final  examination in mathematics , the mean was 72  and standard deviation was 15 . Determine…

A: given information: μ=72σ=15x=65 we want to determine the z score . z=x-μσ  =65-7215  =-0.4667

Q: a department store has daily mean sales of $28,372.72. The standard deviation of sales is $2000. On,…

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A: Given that Mean = 6.9 and Standard deviation = 1.5 Formula z = (x - mean)/ SD

Q: The distribution of scores on the SAT is approximately normal with a mean of u = 500 and a standard…

A: Mean(μ)=500 Standard deviation(σ)=100 The objective is to find the min. SAT score needed to be…

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Q: A random sample of 26 psychology graduates scored an average of 458 on the GRE advanced psychology…

A: From the provided information, Sample size (n) = 26 Sample mean (x̅) = 458 Sample standard deviation…

Q: Suppose you are told that a computer programmer in Portugal who makes $809.40 has a z-score of -0.50…

A: Solution: It is given that a computer programmer in Portugal who makes $809.40 has a z-score of…

Q: Which is better a score of 91 on a test with a mean of 81 and a standard deviation of 15, or a score…

A:

Q: The grades on a test follow a normal distribution with a mean mark of 70 and a standard deviation of…

A:

Q: A study of the Physics and Astronomy department has found that 95% of the graduate students drink…

A: Explanation:Here given the two means and find out the standard deviation of the sample follows the…

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A: The normal distribution: A continuous random variable X is said to follow normal distribution with…

Q: In order to increase customer service, a muffler repair shop claims its mechanics can replace a…

A: Given: x¯=11.6s=2.1n=6 Hypothesis: Null hypothesis: H0: μ=12Alternate hypothesis: H1: μ<12 The…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 103 and a standard…

A: It is given that the IQ scores follow normal distribution with mean 103 and standard deviation 15.…

Q: Suppose the mean blood glucose of a population of adults is 162 with a standard deviation of 58.…

A:

Q: Nationally, the per capita monthly fuel oil bill is $110. A random sample of 36 cities in the…

A: Let μ denotes the population mean per capita monthly fuel oil bill. The national per capita monthly…

Q: the standard error of the mean for a random sample of 49 tax returns is ________.

A: Given information Mean = $ 1,949 Standard deviation = $750 Sample size = 49

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A: μ = 800 σ = 190

Q: The average grade of 64 students selected to test the claim that the students in the Business…

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Q: For a distribution with a mean of 70, if the distribution had a standard deviation of 4, would a…

A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

Q: A teacher claimed that the average score of students in Math class was 77 with a sample standard…

A:

Q: A recent study found that 61 children who watched a commercial for potato chips featuring a…

A: We have to calculate the p value for the hypothesis test for the difference in the means.

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 67…

A: From the provided information, Mean (µ) = 67 Standard deviation (σ) = 6 Let X be a random variable…

Q: The department has decided that all marks from introductory psychology courses should be reported…

A: Here For two different  Distribution Comparison we will Use Standardized statics (Z)..

Q: Suppose that that the average BMI of the patients at Beth Israel Deaconness Medical Center is 30…

A:

Q: Which is better a score of 95 on a test with a mean of 70 and a standard deviation of 15, or a score…

A:

Q: A recent study found that 69% of all adults over 50 wear sunglasses for driving. In a random sample…

A: Formula : Mean = np Standard Deviation  :

Q: The average hours of sleep on a weeknight was 6.9 hours with a standard deviation of 1.5 hours. What…

A: Let, X= The number of hours of sleep on a weeknight. μ=6.9, standard deviation=σ=1.5 We want to…

Q: Suppose the scores of students on an exam are normally distributed with a mean of 253 and a standard…

A: From the provided information, Mean (µ) = 253 Standard deviation (σ) = 80

Q: the golf scores for a school team were normally with a mean of 68 and a standard deviation of 3. Use…

A:

Q: Books in the library are found to have an average length of 350 pages with a standard deviation of…

A: Given that, Books in the library are found to have an average length of 350 pages with a standard…

Q: The local police force gives all applicants an entrance exam and accepts only those applicants who…

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Q: According to the College Board, scores on the math section of the SAT Reasoning college entrance…

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A: Z score is given by where, X is score is mean  is standard deviation

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Q: The average wage for bank managers in a certain city is $91,900 per hour with a standard deviation…

A: Given that  X~N( μ = 91900 , ? = 24300) μ = 91900 , ? = 24300 Z-score =( x - μ )/?

Q: A grade of 81 in a test in which the mean is 75 and the standard deviation is 12 corresponds to a…

A:

Q: In a certain university, the students were informed that they need a grade in the top 8% of the…

A:

Q: What proportion of 2-year-old children watch more than90 minutes of television each day? What…

A: Given: µ = 60 minutes  σ = 25 minutes  Part (1) Consider X as a random variable that follows a…

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Q: The mean salary of all employees in a company is $3,485, and the standard deviation is $1,870. Find…

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Q: A mean of 200 and a standard deviation of 50. Find P60, the score which separates the lower 60% form…

A:

Q: The scores for all high school seniors taking the verbal section of the Scholastic Aptitude Test…

A: Given distribution is bell shaped. In bell shaped distribution mean, median and mode are equal.…

Q: A recent newspaper article reported the results of a survey of well-educated suburban parents. The…

A: Given that 2-year-old children watching an average of 60 minutes of television each day watching an…

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.