Purchase Solution

Statistics: Hypothesis, Probability, Decision Rule

Not what you're looking for?

Ask Custom Question

These are the instructions for these problems.

All text problem assignments must include the problem statement, calculations, formulas, and your method of analysis. Problems should be done in excel - copied and paste into word doc.

8.48 A sample of 20 pages was taken without replacement from the 1,591-page phone directory
Ameritech Pages Plus Yellow Pages. On each page, the mean area devoted to display ads was measured
(a display ad is a large block of multicolored illustrations, maps, and text). The data (in square millimeters) are shown below:

0 260 356 403 536 0 268 369 428 536

268 396 469 536 162 338 403 536 536 130

(a) Construct a 95 percent confidence interval for the true mean. (b) Why might normality be an issue here? (c) What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence? (d) If this is not a reasonable requirement, suggest one that is. (Data are from a project by MBA student Daniel R. Dalach.)

The mean annual turnover rate of the 200-count Bayer Aspirin is 6.0 with a standard deviation of 0.50. (this indicates that the stock of Bayer turns over on the pharmacy shelves an average of 6 times per year.) It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level.
a. state the null hypothesis and the alternate hypothesis
b. what is the probability of the Type I error?
c. give the formula for the test statistic
d. state the decision rule
e. a random sample of 64 bottles of the 200-count size Bayer Aspirin showed a mean turnover rate of 5.84. Shall we reject the hypothesis that the population mean is 6.0? Interpret the result.

Purchase this Solution
Solution Summary

This solution provides assistance with various statistics questions.

Purchase this Solution
Free BrainMass Quizzes
Social Media: Pinterest

This quiz introduces basic concepts of Pinterest social media

Organizational Leadership Quiz

This quiz prepares a person to do well when it comes to studying organizational leadership in their studies.

Academic Reading and Writing: Critical Thinking

Importance of Critical Thinking

SWOT

This quiz will test your understanding of the SWOT analysis, including terms, concepts, uses, advantages, and process.

Situational Leadership

This quiz will help you better understand Situational Leadership and its theories.

View More Free Quizzes
Related BrainMass Solutions

  • Coin Toss: Hypothesis Testing

    is greater than 50.% ) ;The coin is biased toward heads This solution determines the hypotheses, decision rule, and sample statistics in order to compare it to the critical value and come to a decision regarding whether the coin is biased.

  • Statistics and probability of the crew on the Titanic

    Step 4: Select the appropriate test statistic and determine the decision rule The appropriate test statistics is z-statistic.

  • Test of hypothesis using t statistics, ANOVA

    (a) State the null hypothesis and the alternate hypothesis. (b) What is the probability of a Type I error? (c) Give the formula for the test statistic. (d) State the decision rule.

  • Testing a Null Hypothesis on a Random Sample of 100

    Since the decision rule is "reject the null hypothesis when Z-test statistics value is greater than Z-table value", we reject the null hypothesis. 8.20 Use a rejection point to test null hypothesis versus alternate hypothesis by setting probability

  • Explanation of the five-step hypothesis testing model

    If assumptions are not met, alternative hypothesis tests can be considered. 4. State the decision rule The decision rule states the circumstances under which the null hypothesis will be rejected.

  • Small sample t-test for a population mean

    See the decision rule in the detailed calculations below. 2. State the hypothesis to be tested, the decision rule, the test statistic and the decision. The null and alternative hypotheses are shown in the detailed calculations below.

  • Statistics General Questions

    B. conditional probability. C. event. D. outcome. 14 What do we call the statement that determines if the null hypothesis is rejected? A. Decision rule B. Test statistic C. Alternate hypothesis D.

  • Hypothesis testing

    A hypothesis is tested using a 2-tailed decision rule.

  • The solution to Test of hypothesis

    State the decision rule. b. Compute the value of the test statistic. c. What is your decision regarding the null hypothesis?

View More Related Solutions