13. A score that is 20 points above the mean corresponds to az-score of z=1.25. What is the standard deviation? 14. For a nonulation with

Q: 4. Suppose a variable X is normally distributed with a standard deviation of 10. Given that 0.0985…

A:

Q: Suppose that X is normally distributed with mean 110 and standard deviation 18.  What proportion of…

A: Given that, Mean = 110 Standard deviation = 18

Q: A normal distribution has a mean of μ =64 and a standard deviation of σ = 8. What is the probability…

A: Obtain the standard z-score for the random variable M equals 72 The standard z-score for the random…

Q: Suppose the population values 50 and 80 and that their corresponding z scores are -1 and 2…

A: The z score for the population value of 50 is -1 and the z score for the population value of 80 is…

Q: Suppose a population is known to be normally distributed with a mean, u, equal to 144 and a standard…

A: Let us consider the Population is denoted by X which is known to be normally distributed with a mean…

Q: A distribution has a mean of 16 and a standard deviation of 6. What is the Z score that corresponds…

A: A value from any normal distribution can be transformed into its corresponding value on a standard…

Q: 4. Given a distribution with a mean of 60 and standard deviation of 21, find a value with a z-score…

A: Suppose X be the random variable which follows Normal distribution with mean μ=60 and the standard…

Q: 3. Suppose the mean blood glucose of a population of adults is 162 with a standard deviation σ=58.…

A: Given that, n=36,μ=162σ=58 The mean and standard deviation of sample mean is,

Q: 1. The time spent in freefall in when skydiving is normally distributed with a mean of 20 seconds…

A:

Q: Suppose a population is known to be normally distributed with a mean, µ, equal to 116 and a standard…

A: We have, Mean μ=116 Standard deviation σ=14 X~N116,14 Now,…

Q: For a population with mean 90 and standard deviation 10, what is the z-score corresponding to X =…

A:

Q: Do men take less time than women to get out of bed in the morning? The 42 men observed averaged 7.6…

A: Given , n1=42 , n2 =52  x¯1=7.6 , x¯2 =9 s1=2.2 , s2 =2.1 The hypothesis will be stated as below  H0…

Q: 7. If you made only n = 1 measurement of rack height, the standard deviation of the measurement…

A: Solution: 7. From the given information, n = 1.

Q: What value lies under a standard score of 1.5 in a distribution having a mean of 55 and standard…

A:

Q: Claim: The mean pulse rate​ (in beats per​ minute) of adult males is equal to 69 bpm. For a random…

A: Solution: State the hypotheses. Null hypothesis: H0: µ=69 Alternative hypothesis: H1: µ≠69

Q: 2. Given a standard deviation of 3.7, what is the mean if1 0% of the population has a distribution…

A: We have given that,  Let x be the random variable from normal distribution with standard deviation…

Q: A normal distribution has a mean of μ =72 and a standard deviation of σ = 8. What is the probability…

A: Given, μ=72σ=8n=36M=x=72

Q: 2. The blood cholesterol levels of men age 55 to 64 are approximately Normal, with mean 222…

A:

Q: A large retailer wants to determine whether the mean income of families living within two miles of a…

A: Denote μ as the population mean income of families living within two miles of proposed building…

Q: Suppose that, for a certain exam, a teacher grades on a curve. It is known that the mean is 50 and…

A: Given mean is 50 and the standard deviation is 5. There are 35 students

Q: Suppose a population is known to be normally distributed with a mean, µ, equal to 116 and a standard…

A: Let X denote the distribution of population. Given that X ~ N(mean = 116, SD = 14) Then Z = (X -…

Q: For a sample of raw scores, you calculate a mean of 15.25 and a standard deviation of 3.19. What is…

A: Introduction:Suppose a random variable, X has sample mean, x̅ and sample standard deviation, s.For a…

Q: 7. The height of rugby players is normally distributed with a mean of 1.86 m and a standard…

A: Given: Population mean μ=1.86 Population standard deviation σ=0.08 Middle 80% so, α=1-0.80=0.20

Q: If a z-score is equal to −2.05, it is 2.05 standard deviations below the mean. True or False

A: The standardized difference, which measures the difference between a random score (i.e., a value…

Q: What is the z-score of a value of 27, given a set mean of 24, and a standard deviation of 2?

A: Given information Mean (µ) = 24 Standard Deviation(σ) = 2 X = 27

Q: 1. Assume that the IQ scores of SHS students in The College of Maasin follow a normal distribution…

A:

Q: for population with mean of 80 and standard deviation of 9, what is the z-score for X = 84

A: Here mean, mu= 80 Standard deviation, Sigma=9 Z Score= (X-mu)/sigma

Q: 3. The average birthweight of babies tends to be about 3.5 kg and has a standard deviation of 0.5…

A: Given,   Mean = 3.5 standard deviation = 0.5   The objective is to find the required proportions.…

Q: 2) based on earlier studies it is known that the standard deviation is 12.3 days per year. How large…

A:

Q: 19. If the mean is 19 and a standard deviation is 3.7 for a normally distributed variable, what is…

A: Here we need to find the z score corresponding to 14.9.

Q: In a certain distribution of numbers, the mean is 40 with a standard deviation of 5. Atleast what…

A: Given data: Mean = 40 standard deviation = 5. To find: Atleast what fraction of the numbers are…

Q: ​Claim: The mean pulse rate​ (in beats per​ minute) of adult males is equal to 69 bpm. For a random…

A:

Q: Suppose that 100,000 recent grads have starting salaries which are normally distributed with a mean…

A: (d) Obtain the number of recent grads earns above $95,000. The number of recent grads earns above…

Q: Suppose a set of data has a sample mean of 120 and a standard deviation of 14. What is the z-score…

A: Given that we have a set of data that has a sample mean of 120 and S.D. of 14.  µ=120σ= 14 , and we…

Q: Suppose that the score on a reading test are normally distributed within a mean of 70 and a standard…

A:

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

A:

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

A:

Q: 2. If the heights of a male youngsters are normally distributed with a mean of 60 inches and a…

A:

Q: Suppose a population is known to be normally distributed with a mean, µ, equal to 116 and a standard…

A: Answer - A Normal distribution with a mean μ = 116  and a standard deviation σ = 14…

Q: An exam score has a mean of 78 and a standard deviation of 9. What is the Z-score for an exam score…

A: GivenMean(μ)=78standard deviation(σ)=9

Q: 7. A set of data is normally distributed with a mean of 74. If the z-score corresponding to a value…

A:

Q: 15. A report stated that the average number of times a cat returns to its food bowl during the day…

A: Given Information: Mean μ=15.2 Standard deviation σ=4.16 (a) To find the percentage of cats would…

Q: What is the z-score of x = 75, if it is 2.8 standard deviations to the left of the mean? Answer to…

A: If the x = 75 is 2.8 standard deviations to the left of mean. Z value tells the distance from the…

Q: 1. The test scores in MAT 152 are normally distributed with a mean of 95 and a standard deviation of…

A:

Q: A distribution with u = 55 and o= 6 is being standardized so that the new mean and standard…

A: Introduction: For a random variable, X with mean μ, and standard deviation σ, the z-score is given…

Q: 1. The scores of individual students on a nationaltest have a normal distribution with mean 18.6 and…

A: (As per bartleby guidelines, for multiple questions asked, only the first question will be solved.…

Q: 2) The time it take Claudia to drive to work is normally distributed with a mean of 46 minutes and a…

A: The time it take Claudia to drive to work is normally distributed with a mean 46 and standard…

Q: 8. Given a distribution with a mean of 117 and standard deviation of 42, find a value with a z-score…

A:

Q: Suppose a population is known to be normally distributed with a mean, u, equal to 116 and a standard…

A: Given: Population is known to be normally distributed with a mean which is equal to 116 and SD equal…

Q: 2 Consider the normal distribution of IQs with mean of 100 and a standard deviation of 16. What…

A: Note: As per our guidelines we are answering only one question (or) 3 subparts and the rest can be…

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.