if the gpa is 2.75 of 600 students with a confidence level of 90% what is the margin of error if the standard deviation is .45

Q: When IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What is…

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Q: If the average weight for cats is 12 pounds and the standard deviation is 2 pounds. 95 percent of…

A: Given data:  average weight for cats = 12 pounds standard deviation = 2 pounds. To find: 95 % of all…

Q: Suppose the exam average in a class is 82% with a standard deviation of 6. What proportion of…

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Q: What percent of data points fall in the range of z=-1.5 and z=1.5 standard deviations of the mean

A: From the provided information, The range is between z = -1.5 to z = 1.5

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: The test scores in a class are normally distributed with a mean score of 77. if the standard…

A: The distribution of test score are normally distributed with mean of 77. Now consider the standard…

Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…

A: Given that, The scores on a standardized test are normally distributed with, Mean = 95 Standard…

Q: An IQ exam has a mean of 110 and a standard deviation of 12. What percent of people have an IQ score…

A: Given mean= 110 Standard deviation=12 We know that Z=X-mean/standard deviation

Q: a 95% confidence interval for the mean of diastolic BP in women is 62 to 110mmHg.  What is the…

A: We have given that 95% confidence interval CI = ( 62, 110) Confidence level (c) = 95% = 0.95…

Q: the mean for test 1 is 50. and the standard deviation is 7. then the probability that a group of 49…

A: Mean(μ)=50 standard deviation(σ)=7

Q: 500 freshmen at Crescent High School took an algebra test. The scores were distributed normally with…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: It takes an average of 8 minutes for blood to begin clotting after an injury. An EMT wants to see if…

A: Given The data is as follows: Pop. mean, μ=8Sample size, n=62Sample mean, x¯=7.8Sample sd,…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 102 and a standard…

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Q: A statistics professor announces that 15% of the grades he gives are As. The results of the final…

A: It is given that the mean and standard deviation are 83 and 6, respectively.

Q: standardized test has a pop. mean of 152 and a standard deviation of 16. Jenny's z score is -0.56…

A: Given that Jenny's z score= -0.56, Nicole's z score=1.13

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

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Q: What is the raw z-score?

A: Given information Population Mean = mu= 120 Standard deviation = s= 50 Raw score = x =65 Z score = ?

Q: On Bob's last history test, he had a score of 92.  Bob's z-score was -0.5, and the test's standard…

A: Solution -Given that Score in History test be X=92 Z- Score=-0.50 Standard deviation= 6 Find mean…

Q: The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5.…

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Q: A market researcher wants to estimate the amount of money that a Christmass hopper will spend on…

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Q: Suppose the scores of students on a Statistics course are Normally distributed with a mean of 440…

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Q: standardized test has a pop. mean of 152 and a standard deviation of 16. Jenny has a z score of…

A: Given that n=500, z=-0.56

Q: what percent of values fall between 5.25 and 8.75 if the mean =8 and standard deviation =1.89

A: Mean=8 Standard deviations=1.89

Q: what percent of values fall between 5.25 and 8.75 if the mean =7 and standard deviation =1.75

A: Mean=7 Standard deviations=1.75

Q: what percent of values fall between 5.25 and 8.75 if the mean =5 and standard deviation =1.86

A: Answer: From the given data, Mean (μ) = 5 Standard deviation (σ) = 1.86 X follows normal…

Q: If the standard error,  of a sample data set is 5 and the standard deviation,  of the distribution…

A: For a population with mean µ  and standard deviation σ, the standard error is σx̅ = σ/√n, where x̅…

Q: Suppose the test scores in a class are normally distributed with a mean of 70 and a standard…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: The standard deviation on a final examination was 9, while the mean grade was 72. The best 14% of…

A: GivenMean(μ)=72standard deviation(σ)=9

Q: THE SCORES ON THE SAT MATH HAD A MEAN OF 431 AND A STANDARD DEVIATION OF 117. What percent of…

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Q: You are provided with a mean of 28.18 with a standard deviation of 4.33.  What percent of students…

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Q: Dr. Shoals predicts that people who walk a mile in moderately high heels and very high heels will…

A: given data n = 27sd = 3.37standard error for difference in score = ?

Q: A z-score of +1.6 represents a value which is how many standard deviations above the mean?

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Q: Suppose the exam average in a class is 55% with a standard deviation of 4. What proportion of…

A: The random variable score follows normal distribution. The population mean is 55.         The…

Q: It takes an average of 9.9 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: Given information: Sample mean(x¯)=9.2 minutes. Sample size(n)=50. Sample standard deviation(s)=3.79…