What is the value of k?   What is the standard deviation?

Q: 1.Find The standard deviation if the variances are: a.s? = 2.25 b.s? = 3.24 C.s? = 7.29 %3D S = S =…

A: Given  (a) S2=2.25  (b) S2=3.24  (C) S2=7.29

Q: A population was found to have a mean of µ =75 and standard deviation of σ =2.3. If you took every…

A: Given information- Population mean µ = 75 Population standard deviation, σ = 2.3 Sample size, n = 10

Q: A population of scores has mean 80. in this population, a score of X= 86 corresponds to z= +2. what…

A:

Q: A simple random sample of 100 observations was taken from a large population (N > 10,000). The…

A:

Q: a. Suppose a 15 to 18-year-old male from Chile was 176 cm tall from 2009 to 2010. The z-score when x…

A: Given that Let X denotes the height of a 15 to 18 year old male from Chile in 2009 to 2010 X~N(170,…

Q: Cornie developed a test to measure Boredom. He administered it to a group of 20,000 adults. The…

A: Given, score = 1,2,3,4,5,6 and 7

Q: What is the variance if the standard deviation is 1? A, 0.1 B, 1 C. 5 D. 100

A: Solution: given standard deviations of random variable x is sd(x)=1  Then varience of x will be?…

Q: A positive value of z indicates that the number of standard deviations of an observation is to the…

A: Objective of this question is that which option is the correct choice.

Q: Can you find the standard deviation for sx and sy?

A:

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A:

Q: Given the following data for a group of 17 pupils. A. Heights in inches 60, 63, 61, 58, 57, 61, 59,…

A:

Q: 9. If the students who get the fastest 5% completion times will be exempted from the additional gym…

A: Let us assume X=the time it takes for grade 11 students in a certain school to complete a physical…

Q: The following table is the frequency distribution for the amount “screen time” (in hours)  had…

A:

Q: If the mean I.Q. is 100 and the standard deviation of I.Q. scores is 15, then I.Q. of 130 will have…

A:

Q: he personal trainer collected data from a randomly selected sample of days. From this he found that…

A: Glasses(x) Frequency (f) x f 1 2 2 2 4 8 3 5 15 4 9 36 5 x 5x 6 9 54 7 4 28 Total…

Q: Assume you have taken 125 samples of size 81 each from a population. The population variance is 64.…

A:

Q: Suppose that the distribution of diastolic blood pressure in men aged 35-44 years follows a normal…

A: For the distribution of the diastolic blood pressure, the parameters are given as follows:The mean,…

Q: A population of scores has u=55 and o=15.  if 5 points are subtracted from every score in the…

A: The given data is μ = 55σ = 15 Suppose x1, x2, x3, x4, ..., xn are the data points…

Q: Suppose baby kittens' weights have a mean of 11.6 and a standard deviation of 1.5. The z-score tells…

A: Ans#- Given,          Mean μ = 11.6  and Standard deviation σ = 1.5         Use formula  z = x - μσ…

Q: If a distribution has a mean of 35 and a standard deviation of 5, what value would be +1.5 standard…

A: Given that The value of mean of 35, Standard distribution of 5 and that correspond s to a z-score of…

Q: a. The range of the data is b. The standard deviation of the data is (Round your answer to 2 decimal…

A: a.A data set is given.The number of observations is n = 16.

Q: 2. A normally distributed variable has a mean of 75 and a standard deviation of 2. What is the…

A:

Q: 1. Find the variance 2. Find standard deviation  3. find the value of P(X<8)

A:

Q: The average grade for an exam is 74, and the standard deviation is 7. If 11.9% of the class is given…

A: Given: μ = 74 σ = 7 Formula Used: z-score = X-μσ

Q: A population has a mean of μ and a standard deviation of  . a. If 3 points were added to every…

A:

Q: A population of scores has u = 50 and o = 5. If every score in the population is multiplied by 3,…

A: If a constant value multiplies to each score in distribution, then the mean and standard deviation…

Q: A fitness center bought a new exercise machine called the Mountain Climber. They decided to keep…

A: Given Information :  A fitness center bought a new exercise machine called the Mountain Climber.…

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

A:

Q: What is the z-score of x = 3 if it is 2 standard deviation to the left of the mean? O -3 O -2 O -1 O…

A:

Q: population of scores has µ = 10 and σ = 2. If every score in the population is multiplied by 4, then…

A: given data μ = 10σ = 2every score in the population is multiplied by 4. what will be value for new…

Q: What is the variance of X in the following data? -2 | -1 | 0 | 1 | 2 | 3 -3 -1 -2 4 Select one: 17.5…

A:

Q: sample of 100 scores has a mean of 58, a variance of 160, and an estimated standard error of 4.…

A: We have given that  Sample size n= 100 , mean= 58 , variance = 160 , standard error = 4 ?= 12.6491

Q: Suppose samples of soil around homes in an area were obtained and the lead level in each was…

A:

Q: The mean and standard deviation of a set of 11 observations of time are 8 seconds and 2.5 seconds…

A: We have given that Sample mean (x̅) = 8Standard deviations (s) = 2.5

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 population has a mean of 7 for some characteristic of interest and a standard deviation of…

A: Given n=64 Standard deviations=9.6 Mean=7