When solving a problem related to one sample and the confidence interval of variance. Suppose the sample size is n. What is the degree of freedom we will use?

Q: If sum of squares of deviation from the mean =20  and sample variance is 5  then the  number of…

A: Given, sum of squares=20 variance=5 number of observations=?

Q: Suppose we have two normal populations denoted A and B, and we want to compare their population…

A: Let the sample variance of A be SA2, the according to question the variance of B will be…

Q: you have data on smoking status in males (n= 20) and females (n= 15 and want to see if males smoke…

A: We have to determine which statement is true for given situation.Sample sizes n1=20 ,n2=15

Q: When engaging in weight-control (fitness/fat burning) types of exercise, a person is expected to…

A: Given information, n=41x¯=107s=9000=94.8683μ=120

Q: If you are told that a data set has a mean of 25 and a variance of 0, you can conclude. there is…

A: We want to tell that a data set has a mean of 25 and a variance of 0, you can conclude.

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: to population variance, we get an estimate of the sample variance by ① . This is known as ② . This…

A: Population Mean and Variance μ = 1n∑i=1nxiσ2 =1n∑i=1nxi-μ2 Sample mean and variance x¯=1N∑i=1Nxi…

Q: When testing for the difference between 2 population variances with sample sizes of n1=8 and n2=10,…

A:

Q: We would like to compare samples from two different populations A and B. The means of these two…

A: Given that, MuA= 200 MuB= 200 Var(A) = 72 Var(B) = 200 Sample size, nA = 36  nb= 100 We've to find…

Q: A population consists of the following one-digit number (2, 3, 5, 7, 8). Without replacement, let us…

A: Solution-: Given data: 2,3,5,7,8 Here, N=5 (a) List all the possible sample size of 3 from this…

Q: Suppose that you draw a random sample from a population where you know the population mean is 36 and…

A:

Q: You assume equal variances in a two-sample t-test. n1 = 12 and d.f. = 18. What is n2?

A: It is given that n1 =12 and df =18.

Q: An analysis of variances produces dfnetween= 3 and dfwithin = 24. If each treatment has the same…

A: Given that,dfbetween = 3dfwithin = 24Each treatment has the same number of participants.

Q: Jessica hypothesizes that giraffes will look longer at human infants than at adults. In her zoo, she…

A: It is given that Jessica hypothesizes that giraffes will look longer at human infants than at adults…

Q: a(n). . . test ...... To test the equality of two variances, you would use Chi-square

A: We will F test to test the equality of two variances.

Q: If it is known that the percentage of successful students is 75%, and you take a sample of 15…

A: Givenp=0.75n=15Let "x" be the no.of successful bears x~Binomial(n=15,p=0.75)P(X=x)=(nx)(p)x(1-p)n-x…

Q: Which should be true if we use a large sample rather than a small one?

A: Here given , collect a representative random sample  Here Sample size  is  large Here use central…

Q: When finding the t-value, how many degrees of freedom do we have from a sample size of n=10?

A: Degrees of freedom = n-1

Q: A couple wishes to have children until they have exactly two female children in their family. p =…

A: Given problem Given that   A couple wishes to have children until they have exactly two female…

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: O With a one-unit increase in fresh food, satisfaction will increase by .523. O Fresh food…

A: The dependent variable  is satisfaction.The independent variable  is Fresh food.The equation of…

Q: If it is known that the percentage of successful students is 75%, and you take a sample of 15…

A: Given: The percentage of successful students is 75% Sample size n=15

Q: The sum of the squared deviation scores, aka the sum of the squares, is SS=60 for a sample of n=5…

A:

Q: For a given data set the Sum of Squares is 212.69 and the sample size (n) is 11. What is the…

A: Given that  Sum of squares (SS) = 212.69 Sample size (n) = 11   We know that  Variance (S2) = SSn-1…

Q: For a sample of n=16 scores, how many scores are used to calculate the sample variance?

A:

Q: alculate the variance of 13, 25, and 16, using the sum of squares formula (also known as the…

A: We have given that data  13 ,25,16  I want to find variance  Variance = (∑x2 - (∑x)2/n)/(n-1)

Q: You are interested in evaluating how well students perform on an attention test. There are two…

A: In this case, the two conditions "low noise and high noise" are dependent on each other. Both…

Q: A business school has a goal that the average number of years of work experience of its MBA…

A: The random sample of size, The average number of years of work experience, The population variance,…

Q: There are two samples with means 15 and 17. Both of those samples consist of 24 observations. Sample…

A: Given Data : For Sample 1 x̄1 = 15.0 s1 = 2.0 n1 = 24 For Sample 2…

Q: You know that the sample mean, X. is the minimum variance unbiased estimator of . with a variance of…

A:

Q: Suppose that you want to perform a hypothesis test based on independent random samples to compare…

A:

Q: In a hypothesis test, the null hypothesis states that the population variance is equal to 25. A…

A: Given information Population variance =σ2=25, n=sample size=36, sample variance s2=30

Q: Please show your work-Concept and Application Problems (Pg.133) 1. If Sample 1 has a variance of 4…

A: Given that For sample 1  Variance=4 For sample 2 Variance=32

Q: An important problem in industry is shipment damage. A electronics distribution company ships its…

A: For the given data Find the 95% confidence interval for mean

Q: If you have a consistent estimator, what will happen as you increase the sample size A The variance…

A: The statement is given about consistent estimator

Q: Solve for the variance of the weight of all the beans in a box. Also e

A: Let X be the weight of beans that the machine puts into a bag is a random variable with mean 16…

Q: When comparing two independent population means, if n1 = 13 and n2 = 10, degrees of freedom for the…

A: We have given that  n1 = 13,    n2 = 10  We know that the degrees of freedom for two independent…

Q: One sample has n=7 and SS=35 and a second sample has n =17 and SS =45. What is the pooled variance…

A: Given information: The two sample statistics is given as, Sample 1 n1=7SS1 = 35 Sample 2 n2 = 17SS2…

Q: A manager believes that the variance of output on the second shift is greater than the variance on…

A: State the hypotheses.

Q: wo samples. each with n = 5 scores, have a pooled variance of 40. What is the estimated standard…

A:

Q: If it is known that the percentage of successful students is 75%, and you take a sample of 15…

A:

Q: Part 2 Q2: Put (True) or (False). Write True or False for six questions from the following question.…

A: The variance of the estimator is inversely proportional to the sample size, So if the sample…

Q: If Sample 1 has a variance of 4 and Sample 2 has variance of 32, can we tell which sample had a…

A: Given that  Sample 1 Sample variance(s12)=4 Sample 2 Sample variance (s22)=32 We have to find which…

Q: The likelihood that a bulb is defective is 9%, on a particular line. Ten light bulbs are randomly…

A: Answer: From the given data, Sample size(n) = 10 p = 9% = 0.09

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.