Critical value for hypothesis testing

Assignment Help Basic Statistics

Reference no: EM13111393

The mean life of a battery used in a digital clock is 305 days. The lives of the battery follow normal distribution. The battery was recently modified to last longer. A sample of 20 of the modified batteries had a mean life of 311 days with a standard deviation of 12 days. The level of significance is .05. What would be your critical value or decision point?

A)1.725
B)2.093
C)1.729
d)2.086

Did the modifications increase the life of the battery?

Reference no: EM13111393

Questions Cloud

Hypothesis understanding : Suppose that we observe a random sample size n from a normally distributed population. If we are able to reject H0:µ = µ in favor of a two-tailed alternative hypothesis at the 10% significant level

Roles of feedback in strategic quality management process : Why is the deployment phase of the strategic quality management process crucial to the achievement of an organization's vision? What are the roles of feedback in the strategic quality management process?

Calculate the break-even dollar sale volume for each project : Assuming that three units of product A are sold for every four units of product B, calculate the dollar sales volume necessary to break-even. As part of its cost accounting routine, Wilcox Company assigns $36,000 in fixed costs to each product e..

Why is strategic recruitment critical to the achievement : Why is Strategic Recruitment critical to the achievement of an organization in meeting its goals and mission?

Critical value for hypothesis testing : The mean life of a battery used in a digital clock is 305 days. The lives of the battery follow normal distribution. The battery was recently modified to last longer. A sample of 20 of the modified batteries had a mean life of 311 days with a stan..

What is the antitrust case filed alongside microsoft : What is the antitrust case filed alongside Microsoft Corporation in 1998. Write one paragraph summarizing the U.S. government's position. Do you agree with the charge?

Large sample hypothesis test-comparing two means : A study conducted by the research department of a pharmaceutical company claims that the annual spending (per person) for prescription drugs for allergy relief,is greater than or equal to the annual spending (per person) for non-prescription aller..

Determine the computed value of the test statistic : Determine the computed value of the test statistic (z) if the hypothesized proportion is 0.55 the sample size is 521

Identify various strategies available to build teams : You are part of a group of newly hired team superintendents with Riordan Manufacturing. Your group was hired to lead new teams and begin production of the newly designed CardiCare Valve heart valves.

User Account

All Pages