A company has developed a new ink-jet cartridge for its printer that it believes has a...

 

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A company has developed a new ink-jet cartridge for its printer that it believes has a longer life-time on average than the one currently being produced. To investigate its length of life, 40 of the new cartridges were tested by counting the number of high-quality printed pages each was able to produce. The sample mean and standard deviation were determined to be 1511.4 pages and 35-7 pages, respectively. The historical average lifetime for cartridges produced by the current process is 1502.5 pages. a. Specify the null and alternative hypotheses. b. Calculate the value of the test statistic. (Round to two decimal places) c. What is the p-value? (Round to four decimal places) d. At a 5% significance level, what is the critical value? (Round to two decimal places) e. At a 5% significance level, the decision is to A company has developed a new ink-jet cartridge for its printer that it believes has a longer life-time on average than the one currently being produced. To investigate its length of life, 40 of the new cartridges were tested by counting the number of high-quality printed pages each was able to produce. The sample mean and standard deviation were determined to be 1511.4 pages and 35-7 pages, respectively. The historical average lifetime for cartridges produced by the current process is 1502.5 pages. a. Specify the null and alternative hypotheses. b. Calculate the value of the test statistic. (Round to two decimal places) c. What is the p-value? (Round to four decimal places) d. At a 5% significance level, what is the critical value? (Round to two decimal places) e. At a 5% significance level, the decision is to

Answer rating: 100% (QA)

Solution The null and alternative hypothesis is l 15025 T 15114 O 357 n 40 a The null ... View the full answer