sample of 100 scores has a mean of 58, a variance of 160, and an estimated standard error of 4. Which of these values is guaranteed to increase if the sample size is decreased to 10? a. none of these is likely to be changed very much by decreasing n.   b. the value of the variance   c. the value of the mean   d. the value of the standard error

Q: The probability that 0,1,2,3 or 4 peope will be placed on hold when they call a radio talk show is…

A: The given data represents discrete probability distribution. We have to find the variance and…

Q: Suppose X is a random variable with mean 10 and variance 25. Suppose Y is a random variable with…

A: Solution: From the given information, mean of X is 10, variance of X is 25, mean of Y is 20 and…

Q: mple of years, the annual wheat straw production (in pounds) from one plot was as follows. 6.54 5.98…

A: x1 = 71.72n1 =11s1 = 0.5577 x2 = 52.81n2 = 8s2 = 0.9548

Q: 11. A sample of 50 people has a variance of 9. In that case, the standard deviation is a. 3; 441 b.…

A:

Q: Two plots at Rothamsted Experimental Station were studied for production of wheat straw. For a…

A: Given : Sample variance : = 0.317 = 0.933 Sample size : n1 = 11, n2 = 8

Q: If X is normally distributed with a mean of 6 and a variance of 25, P(|X-6|<5) P(|X-6|<10)…

A: As per guideline expert have to answer first three subparts only dear student please upload other…

Q: If X is normally distributed with a mean of 84.0 and a variance of 12.5. a) Calculate the…

A: GivenMean(μ)=84.0variance(σ2)=12.5standard deviation(σ)=12.5=3.5355

Q: If X has a normal distribution with mean 1 and variance 4, the P(X^ 2 -2X<=8)=?

A:

Q: he standard deviation of a sample of 100 observations equals 64. the variance of the sample equals…

A:

Q: The following data represent the age distribution of a sample of 70 women having multiple-delivery…

A: Given: Sample size, n=70 Age Number 15-19 1 20-24 5 25-29 16 30-34 28 35-39 17 40-44…

Q: Find the reliability factor, zα/2, to estimate the mean, µ, of a normally distributed population…

A: Given data: Find the reliability factor, zα/2, to estimate the mean, µ, of a normally distributed…

Q: 1. If the population has a variance of 16 units, what is the variance of the mean if sample of size…

A: The hypotheses test contains the two type of errors. Which are,         Type I error         Type II…

Q: If the variance of a binomial variate is 16, then the standard deviation of the variate is O a. 16 O…

A: Let VarX be the variance and σ be the standard deviation The relation between the variance and…

Q: Two plots at Rothamsted Experimental Station were studied for production of wheat straw. For a…

A: the sample variance is s2 not equal to  0.349. =0.458 the sample variance for this plot is s2 ≈…

Q: Assume two populations, one of size 15 and variance 12 and the other one of size 10 and variance…

A: Given, n1=15, n2=10, σ12=12, σ22=7.6 The combined standard deviation is given by,…

Q: The distribution of room and board expenses per year at a four-year college is normally distributed…

A: We want to find z score  If Z Value lie outside (-3, 3) then it will be unusual.

Q: If a sample size is equal to the population variance, then the standard error is equal to  σM = 1.…

A: The sample size is equal to population variance.

Q: A sample of 60 items from population 1 has a sample variance of 8 while a sample of 40 items from…

A:

Q: With standard deviations of s1 = 8.88 and s2 = 30.22, and sample sizes of n1 = 7 and n2 = 8, find…

A:

Q: Which of the following better approximates the variance of the sample means? b. 4. VN-n N-1 a. 4 vn

A: Varince is the measure of dispersion. It used to understand the variance of each observation from…

Q: Suppose you were to take samples of size 100 from a population with a mean of 12 and a standard…

A:

Q: If the variance of a binomial variate is 4, then the standard deviation of the variate is а. 2 O b.…

A: We know that, Standard deviation=√ Variance

Q: Suppose a population has a mean of 870 and a variance of 1,600. If a random sample is size 64 is…

A:

Q: The sum of the squared deviation scores is SS = 20 for a sample of n = 6 scores. What is the…

A: The variance of the sample can be calculated as:

Q: Suppose that at Elkhorn High School, the number of hours per week that seniors spend on homework is…

A: Given that  Population standard deviation =6.0 Population mean μ =18.6

Q: Which of the following is not an assumption for the use of the Pearson-Product Moment Coefficient of…

A: Ans.  Assumption for the use of the Pearson-Product Moment Coefficient of Correlation are; The…

Q: Here is a POPULATION of scores: 4 2 3 2 1 29. What is the variance for this population of scores?…

A:

Q: X P(x) 1 1/5 2 1/5 3 1/5 4 1/5 5 1/5 6 1/5

A: Given data is  x 1 2 3 4 5 6 P(x) 1/5 1/5 1/5 1/5 1/5 1/5

Q: State the alternative hypothesis. a. Ha : σ^2 > 1.6 b. Ha : σ^2 < 1.6 c. Ha : σ^2 ≠ 1.6   2.…

A: Given that  Sample size n =30 Sample variance =2.3 Population variance =1.6 NOTE:- According to…

Q: A sample of n =25 means  has a variance of 36. What is the standard error for the sample means?…

A: Sample size, n = 25 Variance = 36 We know that, Standard deviation = VarianceStandard deviation…

Q: f ?X is Normally distributed with a mean of 3 and a variance of 4, find ?(|?−3|>1.3)to 2 decimal…

A: we have given that  mu=3 .sigma^2=4  X~N(mu=3 , sigma^2=4) X is a normally distributed

Q: Two plots at Rothamsted Experimental Station were studied for production of wheat straw. For a…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Two samples, each with n = 6scores, have a pooled variance of 18. What is the estimated standard…

A: The pooled variance is 18.

Q: Which of the following better approximates the variance of the sample means? b. . N-1 a. 4

A:

Q: if standard deviation equal 4 so the variance equal 6. 16 8 10 O O O O O 00

A:

Q: Which of the following better approximates the variance of the sample means? a. 4 b. 2. VN-n Vn N-1

A: here given, σ = population standard deviation  N= population size  n= sample size

Q: 3. The following is a set of data collected from a sample population. 43 46 47 50 45 | 46 43 48 Use…

A: Introduction: Suppose x1, x2, …, xn is a sample of size n taken from a population of interest. The…

Q: If a sample of size 16 is selected from a population that follows a normal distribution with mean 32…

A: Given If a sample of size 16 is selected from a population that follows a normal distribution with…

Q: If the variance of a binomial variate is 16, then the standard deviation of the variate is O a. 4 O…

A: Given Variance of data is 16 WE know that , Standard Deviation = Variance…

Q: If an entire population with u= 60 and o = 8 is transformed into z-scores, then the distribution of…

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

Q: the standard Z value of a 16-unit sample taken randomly from a normal distribution populason with an…

A:

Q: An analysis of variance produces SSb=35,SSw=15 and a F ratio with the df=1,5.What is the F ratio?

A:

Q: Which of the following is not an assumption on error? Error has a constant variance Error follows a…

A: Error has a constant variance:  It can be true that error has a constant variance if residuals are…

Q: 3. For a normal population with a mean of 20 and a variance IU, None of the other 0.25 0.50 0.35

A: Answer: 3- Given a normal population with mean μ  = 20  and variance σ2  = 10                   Find…

Q: A study wants to investigate whether the population variance is greater than 8. If a random sample…

A: Given : n = 40 s2 = 10 Hypothesis : H0 : σ2 ≤ 8 H1 : σ2 &gt; 8

Q: For a population with a mean of mu=72 and a standard deviation of sigma= 10, what is the standard…

A:

Q: Assume the mean and variance of 5 observations are 1 and 5, respectively. If 5, as one of these five…

A: Given : mean = 1 variance = 5

Q: To evaluate the effect of a treatment, a sample of n= 8 is obtained from a population with a mean of…

A:

Q: A group is interested in seeing if the mean gas mileages from two different brands of gasoline are…

A: Given:

Q: A certain data set has a variance of 9.  Find the standard deviation of the data set.

A: Given :-   Variance (S2) =9   we have to find standard devistion.