A sample of 64 is taken from a population, with the mean of the sample being 119 and the standard deviation of the sample being 16. What is the 99.7% confidence interval for the mean of the population? O A. (115, 123) OB. (113, 125) O C. (118, 120) O D. (117, 121)

Q: Students pass a test if they score 50% or more. The marks of a large number of students were sampled…

A: Given information- Population mean, µ = 42% Population standard deviation, σ = 8% We have given that…

Q: A statistics teacher believes that the final exam grades for her business statistics class have a…

A: Given Normal distribution with  Mean =82   SD =8 We have to answer for mentioned questions

Q: The mean and S.D. of sample of size 10 were found to be 9.5 and 2.5 respectively. Later on an…

A: Mean and Standard deviation is a measure of central tendency. Xi be the ith observation , i=1,2,...…

Q: Instruction: Dr. Jason wants to determine the spread of the scores of his two classes in their final…

A: Given that: Class A x f 90-98 3 81-89 7 72-80 7 63-71 11 54-62…

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 121…

A: Note: Hi there! Thank you for posting the question. As there are multiple sub-parts, according to…

Q: In a calculus class, Jack Hartig scored 7 on a quiz for which the class mean and standard deviation…

A: The question is about z scoresGiven :For student " J " :Raw score ( x1 ) = 7Mean score of the class…

Q: The scores on a standardized test are normally distributed with a mean of 90 and standard deviation…

A: From the provided information, Mean (µ) = 90 Standard deviation (σ) = 20 X~N (90, 20) Here X is a…

Q: Find the standard deviation for the group of data items. Stems Leaves 8 1 58 2 58 The standard…

A: Given data : From the above stems and leaves data 8,15, 18, 25, 28 x¯ = ∑xin x¯ = 8+15+18+25+285 x¯…

Q: Let X = { 1,2,6,9,11}. Find the mean and standard deviation given that X is a sample. %3!

A: The mean for the sample is calculated as follows:

Q: The prices of photo printers on a website are normally distributed with a mean of $232 and a…

A: The prices of photo printers on website are normally distributed with mean of $232 and standard…

Q: For a population, a deviation score is computed as X – σ.

A: What is Deviation score ? Deviation score is basically a degree of score from which a raw score is…

Q: A population has a stand. dev. of 24. on average, how much difference should there be between the…

A:

Q: her wishes to give A’s to the top 8% of the students and F’s to the bottom 8%. The next 10% will be…

A: given: mean(μ)=78 sd(σ)=8

Q: If the heights of a male youngsters are normally distributed with a mean of 60 inches and a standard…

A:

Q: What symbol is used for the standard deviation when it is a sample statistic? What symbol is used…

A: We know that-

Q: A simple random sample of 64 observations was taken from a large population. The sample mean and the…

A:

Q: The z statistic indicates:

A: here we will use basic of Normal distribution  z- score or z-statistic is Standard Normal Random…

Q: A distribution of data has a mean of 26 and a standard deviation of 2. How many standard deviations…

A: Population mean μ =26 Population standard deviation =2

Q: A population has a mean = 86 and a standard deviation a=21. Find the mean and standard deviation of…

A: Given information: The sample size is n =258. Population mean, μ=86. Population standard deviation,…

Q: A population has a mean u= 85 and a standard deviation o = 16. Find the mean and standard deviation…

A: List of formulae : Mean of sampling distribution of sample mean ( x¯ ) : μx¯  = μ Standard deviation…

Q: A woman is told that her weight has a standard score (z-score) of – 1.5. This means that: her weight…

A: Z-Score: It is a dimensionless quantity that is used to indicate the signed, fractional, number of…

Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?

A:

Q: Derive mean of gamma distribution.

A:

Q: ssume that adults have IQ scores that are normally distributed with a mean of 100 and a standard…

A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 15 X~N (100, 15) Here X be a…

Q: A scientist found that the lengths of a certain population of snakes can be reasonably described…

A: The normal distribution  in the center is generally denser and basically less dense at tails. There…

Q: How many of the sample of families would fall above 2 standard deviations from the mean? A. 0 B. 1…

A:

Q: Find the mean deviation about the median for the followine i- 39.5, 3, 12, 10, 18, 4, 7, 19, 21.

A: Introduction :

Q: A population has a mean u= 75 and a standard deviation o = 6. Find the mean and standard deviation…

A:

Q: A population has a mean μ = 70 and a standard deviation o=36. Find the mean and standard deviation…

A: Mean=70 Standard deviations=36 Sample size =81

Q: In a study 10 people were given a test. The mean test score was 78.9 points. The standard deviation…

A: Given: Sample size n = 10 Sample mean X = 78.9 Sample standard deviation s = 5.2 Formula Used: X =…

Q: A population has μ = 50 and σ = 5. If 10 points are added to every score in the population, what are…

A: Consider, (µ) = 50 and (σ) = 5 Let, X be the scores of the population. If 10 points are added to…

Q: Suppose a class average on a test is 75 and the standard deviation is 10. if joe scores 80 on the…

A: