7. Use the Excel to test (at the 0.05 level) whether or not...

Sri K and 65 other subject Intro Stats / AP Statistics educators are ready to help you.

Ask a new question

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Key Concept

Premium Feature

Explore the core concept behind this problem.

Key Concept

Premium Feature

Explore the core concept behind this problem.

Recommended Videos

suppose-two-independent-random-samples-of-sizes-n1-9-and-n2-7-that-have-been-taken-from-two-normally-distributed-populations-having-variances-21-1-2-and-22-2-2-give-sample-variances-of-s2111-44574

Suppose two independent random samples of sizes n1 = 9 and n2 = 7 that have been taken from two normally distributed populations having variances σ1^2 and σ2^2 give sample variances of s1^2 = 111 and s2^2 = 12. (a) Test H0: σ1^2 = σ2^2 versus Ha: σ1^2 ≠ σ2^2 with α = .05. What do you conclude? (Round your answers to 2 decimal places.) (b) Test H0: σ1^2 = σ2^2 versus Ha: σ1^2 > σ2^2 with α = .05. What do you conclude? (Round your answers to 2 decimal places.)

Sri K.

suppose-two-independent-random-samples-of-sizes-n1-9-and-n2-that-have-been-taken-from-two-normally-distributed-populations-having-variances-0-ad-62-give-sample-variances-of-111-ad-s3-12-a-te-64638

Suppose two independent random samples of sizes n1 = 9 and n2 = 7 that have been taken from two normally distributed populations having variances σ₁² and σ₂² give sample variances of s₁² = 111 and s₂² = 12. (a) Test H₀: σ₁² = σ₂² versus Ha: σ₁² ≠ σ₂² with α = .05. What do you conclude? (Round your answers to 2 decimal places.) F = F0.025 = H₀: σ₁² = σ₂² (b) Test H₀: σ₁² = σ₂² versus Ha: σ₁² > σ₂² with α = .05. What do you conclude? (Round your answers to 2 decimal places.) F = F0.05 = H₀: σ₁² ≤ σ₂²

Jacob F.

Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel. (a-1) Comparison of GPA for randomly chosen college juniors and seniors: x̄1 = 3.05, s1 = 0.20, n1 = 15, x̄2 = 3.25, s2 = 0.30, n2 = 15, α = 0.025, left-tailed test. (Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick" rules for degrees of freedom.) d.f. t-calculated p-value t-critical (b-1) Comparison of average commute miles for randomly chosen students at two community colleges: x̄1 = 15, s1 = 5, n1 = 22, x̄2 = 18, s2 = 7, n2 = 19, α = 0.05, two-tailed test. (Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick" rules for degrees of freedom.) d.f. t-calculated p-value t-critical +/- (c-1) Comparison of credits at time of graduation for randomly chosen accounting and economics students: x̄1 = 139, s1 = 2.8, n1 = 12, x̄2 = 137, s2 = 2.7, n2 = 17, α = 0.05, right-tailed test. (Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick" rules for degrees of freedom.) d.f. t-calculated p-value t-critical

Adi S.

Transcript

00:01 In this question, we are given two sample sizes.

00:06 Sample size for the first sample denoted by n1 is given as 9.

00:13 And sample size for the second sample denoted by n2 is given us 7.

00:20 So we can calculate degrees of freedom, degrees of freedom denoted by d .f using the formula n minus 1...

Question

7. Use the Excel to test (at the 0.05 level) whether or not the variances of X1 and X2 below are equal: X1 X2 1 50 1 10 2 99 5 1 4 4 3 8 2 99

Question

7. Use the Excel to test (at the 0.05 level) whether or not the variances of X1 and X2 below are equal: X1 X2 1 50 1 10 2 99 5 1 4 4 3 8 2 99

Please give Ace some feedback