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CHALLENGE ACTIVITY 402562.2600368.qx3zqy7 8.1.3: Hypothesis testing for two population means (one-tailed t-test). Jump to level 1 A sales manager for a large department store believes that customer spending per visit with a sale is lower than customer spending without a sale, and would like to test that claim. A simple random sample of customer spending is taken from without a sale and with a sale. The results are shown below. Without sale With sale Mean 82.904 71.316 Variance 1984.95 1826.41 Observations 200 150 Hypothesized Mean Difference 0 df 328 t Stat -2.465 P(T<=t) one-tail 0.0071 t Critical one-tail -1.65 P(T<=t) two-tail 0.0142 t Critical two-tail -1.967 -3 -2 3 Confidence Level 99% P= Ex: 1.234 Samples from without sale: n₁ = Ex: 9 t= Samples from with sale: n₂ = Point estimate for spending without sale: 1 = Ex: 1.234 Point estimate for spending with sale: ₂ =

CHALLENGE ACTIVITY 402562.2600368.qx3zqy7 8.1.3: Hypothesis testing for two population means (one-tailed t-test). Jump to level 1 A sales manager for a large department store believes that customer spending per visit with a sale is lower than customer spending without a sale, and would like to test that claim. A simple random sample of customer spending is taken from without a sale and with a sale. The results are shown below. Without sale With sale Mean 82.904 71.316 Variance 1984.95 1826.41 Observations 200 150 Hypothesized Mean Difference 0 df 328 t Stat -2.465 P(T<=t) one-tail 0.0071 t Critical one-tail -1.65 P(T<=t) two-tail 0.0142 t Critical two-tail -1.967 -3 -2 3 Confidence Level 99% P= Ex: 1.234 Samples from without sale: n₁ = Ex: 9 t= Samples from with sale: n₂ = Point estimate for spending without sale: 1 = Ex: 1.234 Point estimate for spending with sale: ₂ =

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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brary EzyBooks catalog Hypothesis tests for the difference between two population means CHALLENGE 8.1.3: Hypothesis testing for two population means (one-tailed t-test). ACTIVITY 402.562.2600368.qx3zqy7 Jump to level 1 A sales manager for a large department store believes that customer spending per visit with a sale is lower than customer spending without a sale, and would like to test that claim. A simple random sample of customer spending is taken from without a sale and with a sale. The results are shown below. Without sale with sale Mean 82.904 71.316 Variance 1984.96 1826.41 Observations 200 150 Hypothesized Mean Difference 0 1 Stat P(T<=t) one-tail 0.0071 t Critical one-tail P(T<=t) two-tail 0.0142 t Critical two-tail -1 6 3 Confidence Level P = EX 1.234 Samples from without sale: ni Ex: 9 Samples from with sale: n₂ = Point estimate for spending without sale: 1 = Ex: 1.234) Point estimate for spending with sale: ₂ 7 O 1 -201 RETIES
Transcribed Image Text:brary EzyBooks catalog Hypothesis tests for the difference between two population means CHALLENGE 8.1.3: Hypothesis testing for two population means (one-tailed t-test). ACTIVITY 402.562.2600368.qx3zqy7 Jump to level 1 A sales manager for a large department store believes that customer spending per visit with a sale is lower than customer spending without a sale, and would like to test that claim. A simple random sample of customer spending is taken from without a sale and with a sale. The results are shown below. Without sale with sale Mean 82.904 71.316 Variance 1984.96 1826.41 Observations 200 150 Hypothesized Mean Difference 0 1 Stat P(T<=t) one-tail 0.0071 t Critical one-tail P(T<=t) two-tail 0.0142 t Critical two-tail -1 6 3 Confidence Level P = EX 1.234 Samples from without sale: ni Ex: 9 Samples from with sale: n₂ = Point estimate for spending without sale: 1 = Ex: 1.234) Point estimate for spending with sale: ₂ 7 O 1 -201 RETIES
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