We want to test if there is a difference in the amount the families in the two cities spend on utilities. Ho: Ha: Pooled variance = What decision should be made?

Q: (a) Use the 0.02 level of significance to test the hypothesis whether it is reasonable to assume…

A:

Q: how to calculate the variance?

A: Given  The data is as follows: Overall mean = 4.07 Variance = 0.00130 SD = 0.1140

Q: For the independent-measures t statistic, what is the effect of increasing the sample variances?

A: If there is more variance in the sample data , then the difference between the mean of data and data…

Q: BBy the Uniqueness Property of the MGF, what is the O Find the mean and variance of W using its…

A:

Q: The homogeneity of variance assumption stipulates that, O the two samples have equal variances O…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

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: Suppose X has finite variance. Let Y = |X|. Does Y have the same, a smaller, or a larger variance…

A: Given that X has finite variance i.e. var(x)<∞ Let Y =|X| that means Y can take 2 values i.e. X…

Q: d) If the variance is 120 1b, what sample size is necessary to estimate true yield point to be…

A: Given that  Variance  ?2=120 Margin of error =E =3 99% confidence.

Q: In the 5 models above, which variable, by itself, explains the greatest proportion of total variance…

A: Predictor P for variable X3 is larger among all other variables. Hence variable X3 explains that…

Q: The F-ratio for a one-way analysis of variance comparing three treatments with n = 10 in each…

A:

Q: Two balanced coins are flipped. What is the variance of the number of heads observed?

A: For this case, the number of possible outcomes will be:  (HH), (HT), (TT), (TH) Here, H represents…

Q: How do you find the standard error estimate of two disjoint populations, assuming they have the same…

A:

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

A: Given: Let the pooled variance be sp2 n1=n2=5   Let the standard error be SE Formula for Standard…

Q: how to find the variance?

A: Variance is a measure of variability. It is computed by the average of squared deviations from the…

Q: Current estimates suggest that 55% of the home-based computers in a foreign country have access to…

A: From the provided information, 55% of the home-based computers in a foreign country have access to…

Q: An analysis of variance produces SSbetween = 40 and MSbetween = 20. In this analysis, how many…

A: Solution: From the given information, SSbetween=40 and MSbetween =20. Then,

Q: In practice, when comparing two means using small samples, when would you recommend assuming equal…

A: We have to find current option from the given options.

Q: a. Calculate the variance of the scores 10r woman. b. Are the scores for the younger woman more con-…

A: Younger (X) Older (Y) (x-xbar)^2 (y-ybar)^2 8 7 0.5625 0.0625 6 5 1.5625 5.0625 6 8 1.5625…

Q: When is the population standard greater than the population variance?

A: Variance: The variation between each observation from its mean is known as variance. The greater the…

Q: A sample of n=4 has test scores of 0, 0, 12, 12 What is the range, the variance and the standard…

A: Given information- Sample size, n= 4 Given test scores are- 0, 0, 12, 12 We know that- Range =…

Q: Give 2 examples of Variance and standard deviation for grouped data to coefficient of skewness and…

A:

Q: Before using these variance estimates, what must we calculate?

A: Before using any variance estimate we should check whether it is biased or unbiased and calculate…

Q: If a data set has 25 values and a standard deviation of 7.4, then the variance is?

A: Given: Standard deviation = 7.4

Q: A recent article reported “A one-way analysis of variance found that GRE scores varied according to…

A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have…

Q: The assumption of homogeneity of variances was tested by Levene’s Test, F(2, 432) = .75, p = .48.…

A: Decision rule: If p-value ≤ α, then reject the null hypothesis. Otherwise, fail to reject the null…

Q: The formula for total variance (SST) is

A: Solution:-

Q: What is formula for the variance of the population?

A:

Q: b) The variance estimator from the two-stage cluster sampling will be always smaller than the…

A: Given problem Given that   The variance estimator from the two-stage cluster sampling will be…

Q: Two accounting professors decided to test if the variance of their grades is different or no.…

A: We havr to find correct answer.

Q: If you have a Pearson correlation coefficient of .30, what is the proportion of variance accounted…

A:

Q: It is known that the population variance equals 522. What is the sample size that needs to be taken…

A: It is given that:

Q: When calculating an independent-samples t test, the pooled variance is:

A: Given: Independent sample t-test.

Q: An independent-measures study produces sample means of M, 20 and M2 17. If both samples have n = 18…

A: The formula for Cohen’s D is: d = (M1 – M2) / spooled Where: M1 = mean of group 1 = 20 M2 =…

Q: You have an independent-measures study where your first sample has an s² = 9 and your second sample…

A: Given : S12 = 9 S22 = 6

Q: We are interested in determining whether or not the variances of the sales at two music stores (A…

A: Suppose the variance of sales of store A (1st population) is σ12 and the variance of sales of store…

Q: 18. Describe the homogeneity of variance assumption and explain why it is important for the…

A: Introduction: In general, the homogeneity of variance assumption considers that two or more groups…

Q: Assume that you have a binomial experiment with p = 0.4 and a sample size of 50. The variance of…

A: X be a random variable that follows binomial distribution with probability of success 0.40 and…

Q: with that of the shock absorbers pro -n, one of the manufacturer's and one cted and installed on the…

A: Table for the result of examination can be shown as, Car Manufacturer Competitor Difference 1…

Q: An analysis of variance produces SSb = 40 and MSb = 20.  In this analysis, how many treatment…

A: Let k be the number of treatments Given that SSb = Between sum of squares = 40 MSb = Between mean…

Q: If an analysis of variance is used for the following data, what would be the effect of changing the…

A: Given Sample Data M1 = 15                        M2 = 25 SS1 = 90                       SS2 = 70

Q: (b) Suppose that the test for equal variances in (a) concludes that the two populations have…

A: Hypothesis testing is an inferential procedure in statistics.

Q: How many F ratios are figured in a two-way analysis of variance?     1     2     3     as many…

A: In two-way analysis of variance we calculate 3 F ratios.

Q: It is not essential to know the value of the population variances to test for the equality of two…

A: Solution To test the equality of means the F test is used .

Q: Explain the circumstances under which we would need to pool the variance for an independent samples…

A: The pooled sample variance offers a higher precision estimate of the variance than the individual…

Q: A semiconductor product consists of three layers. Suppose that the variances in thickness of the…

A: The semiconductor product consists of three layers.

Q: the homogeneity of variances assumption states that the variance in the two samples must be equal?…

A: Homogeneity of variances always make about the population variance not about sample.

Q: If the sample variance for y1 = {-2, 7,9,13,16,0,15,6} is 44, what is the variance of y2 = 3.8 * y1?…

A: SOLUTION:- Given data for sample variance y1={-2, 7,9,13,16,0,15,6}=44…