A population has a variance of 867. We take a random sample of size 47 from this population. Let Xbar be the sample mean and let Xtot be the sample sum of our sample. These are random variables. d) What is the standard deviation of Xtot? (to three decimal places) e) What is the smallest sample size, n, which will make the standard deviation of Xtot at least 324? f) What is the smallest size sample, n, which will make the variance of Xtot at least 93100?

Q: A population has a mean u = 155 and a standard deviation o =21. Find the mean and standard deviation…

A: Given : μ = 155 , σ= 21 and n= 50

Q: A population has a mean u = 141 and a standard deviation o = 28. Find the mean and standard…

A: GivenMean(μ)=141standard deviation(σ)=28sample size(n)=56

Q: The mean is u: = and the standard deviation is o: =

A: Given,

Q: f the necks of giraffes follow a Normal distribution with mean = 1.8 meters and standard deviation =…

A: Given Normal distribution with mean u = 1.8 meters  standard deviation sigma = 0.2 meters.

Q: A population has a mean = 151 and a standard deviation a = 24. Find the mean and standard deviation…

A: Given information- Population mean μ=151Population standard deviation σ=24Sample size n=60 We have…

Q: A population has a mean u= 139 and a standard deviation o = 23. Find the mean and standard deviation…

A: The mean of the sampling distribution of these sample means is obtained below: From the given…

Q: A population has SS - 100 and variance, o-4. What is the value of EX - jal for the population? O 100…

A: given that ss of population=100 variance σ2 =4 σ2= [Σ(x-μ)2]/N where N is number of data

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

A:

Q: Here are the weights of the bass from Tina’s sample: 12, 9, 15, 10, and 11.  We do not know the…

A:

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

A:

Q: A population has a mean u = 130 and a standard deviation o = 26. Find the mean and standard…

A:

Q: Suppose a random sample of exponential random variables X1, ..., Xn is taken. Find the meanand…

A: Step 1:The sample mean, denoted by ˉXˉ, of a random sample of exponential random variables…

Q: variable Y is twice th

A: It is given that mean of random variable Y is twice the mean of the random variable X. EY=2EX The…

Q: sample of 100 observations was taken from a large population. The sample mean and the variance was…

A: Solution: Given information: n= 100  Sample size x=80  Sample mean s2=144 Sample variance s=s2s=…

Q: (HC) adult standard deviation. A random sample of ten healthy adult females was taken with the…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: Mrs. Santos administered a Science Achievement Test to a random 45 graduating SHS students. In this…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

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

A:

Q: A population has a mean of u deviation of o = 10. a. If 3 points were added to every score in the…

A: (a) The population has mean 50 and population standard deviation 10. Calculation: If n points added…

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: ith a mean of 110 and standard dev. of 15, find the 3 unique deviations to the left and right of the…

A: Deviations to the left   i) One standard deviation away from mean x = u - s x = 110 - 15 = 95   ii)…

Q: ← A population has a mean μ 156 and a standard deviation o=30. Find the mean and standard deviation…

A: simple formula of sample mean has used and solve.

Q: QUESTION 8 The weight, in grams, of vacuum-packaged meat product is normally distributed with…

A: For the given data Find all the required

Q: rm the original sample into a new sample with mean of M=50 and s = 10

A: Given: Sample size, n = 6 Scores = 2,7,4,6,4,7 1. Mean and standard deviation: Mean:…

Q: 3) A study of estrogen levels in two different groups of women finds the following results (in…

A: Solution For 4: The summary statistics for estrogen levels of two different groups of women are…

Q: The amounts of electricity bills for all households in a particular city have an approximately…

A:

Q: The sum of the squared deviations of scores from their mean: is computed the same for samples and…

A: Introduction The deviations is a measure of difference b/w the observed value and some other value.

Q: A population has a mean = 151 and a standard deviation a = 30. distribution of sample means with…

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: Create a column of numbers going from 0 to 30. in binomial distrubution with n=30 and p=0.5.…

A: Introduction to binomial distribution: Consider a random experiment involving n independent trials,…

Q: A population has a mean H= 157 and a standard deviation o = 27. Find the mean and standard deviation…

A: Determine the sampling distribution of the sample mean for sample of size 54. The sampling…

Q: What theorem will let us treat T and M as approximately normal random variables? Monte Carlo…

A: Let X represents the fracture strength of the glass. a) Central limit theorem According to this…

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

A:

Q: The mean wage per hour for all 4000 employees working at a large company is RM 10.50 with a standard…

A: Given information- Population Mean µ = RM 10.50 Standard deviation (σ) = RM 5.30 We have to find the…

Q: Roll the correct die 100 times. Find:   a) the average of the dropped points Enter the exact…

A: (a). Find the average of the dropped points: Denote Xi as the number shown in the ith role of the…

Q: P3. Show that the mle of unknown standard deviation when the mean is known is different from the…

A:

Q: A population has a mean u = 165 and a standard deviation a = 30. Find the mean and standard…

A:

Q: A population has a mean u = 157 and a standard deviation o = 20. Find the mean and standard…

A: Given that μ=157,σ=20 and n= 43 The mean of the sampling distribution of sample mean is,

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.