An article gave the following summary data on zinc mass (g) for two different brands of size D batteries. Brand Sample Size Sample Mean Sample SD Duracell 15 138.72 7.76 Energizer 20 149.07 1.52 Assuming that both zinc mass distributions are at least approximately normal, carry out a test at significance level 0.05 to decide whether true average zinc mass is different for the two types of batteries. n USE SALT State the relevant hypotheses. (Use u, for Duracell batteries and u, for Energizer batteries.) O Ho: Hy - H2 = 0 HoiHy -Hz> 0 O Ho: Hy - Hz = 0 Hại Hy- Hz zO O Hoi Hy - Hz = 0 Hgi Hy- Hz #0 O Ho: Hy- H2 = 0 Hai Hq- Hz< 0 Calculate the test statistic and P-value. (Round your test statistic to one decimal place and your P-value to three decimal places.) p-value =

An article gave the following summary data on zinc mass (g) for two different brands of size D batteries. Brand Sample Size Sample Mean Sample SD Duracell 15 138.72 7.76 Energizer 20 149.07 1.52 Assuming that both zinc mass distributions are at least approximately normal, carry out a test at significance level 0.05 to decide whether true average zinc mass is different for the two types of batteries. n USE SALT State the relevant hypotheses. (Use u, for Duracell batteries and u, for Energizer batteries.) O Ho: Hy - H2 = 0 HoiHy -Hz> 0 O Ho: Hy - Hz = 0 Hại Hy- Hz zO O Hoi Hy - Hz = 0 Hgi Hy- Hz #0 O Ho: Hy- H2 = 0 Hai Hq- Hz< 0 Calculate the test statistic and P-value. (Round your test statistic to one decimal place and your P-value to three decimal places.) p-value =

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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