4. Making Decisions with Confidence IntervalsAssume you work for Kimberly Clark Corporation, the makers of Kleenex. The job you arepresently working on requires you to decide how many Kleenexes are to be put in the newautomobile glove compartment boxes. Complete the following.a. How will you decide on a reasonable number of Kleenexes to put in the boxes?b. When do people usually need Kleenexes?c. What type of data collection technique would you use?d. Assume you found out that from your sample of 85 people, on average about 57 Kleenexesare used throughout the duration of a cold, with a population standard deviation of 15. Usea confidence interval to help you decide how many Kleenexes will go in the boxes.e. Explain how you decided how many Kleenexes will go in the boxes.

We use confidence intervals to solve this problem.

Answered: 4. Making Decisions with Confidence…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In a study conducted by a human resource management organization, 492 human resource professionals were surveyed. Of those surveyed, 83% said that their companies conduct criminal background checks on all job applicants. Complete parts (a) through (d). Question content area bottom Part 1a. What is the exact value that is 83% of 492 survey subjects?
The human resource manager at a car dealership wants to know if the ages of its employees are related to the department that they work in. Data was compiled and tabulated in a 2-way contingency table. The employees were classified according to their age and department. Expected counts are printed below observed counts Saies Accounts Marketing Repairs Total 20-29 10 27 43 88 17.74 *** 26.20 23.62 30-39 29 26 22 38 26.72 23.18 34.24 30.86 40-49 33 32 72 82 219 44.15 50.88 65.20 58.77 50-59 81 106 86 75.97 54 327 65.92 97.36 87.75 Total 151 ** 223 201 749 **** + Chi-Sq = 5.348 + 0.024 + 15.912 + 1.459 + 0.019 + 0.413 + 2.544 + 2.816 + 7.003 + 0.709 + 9.182 + 3.448 + 11.875 + 1.325 + 12.983 = 80.395 DF = *****, P-Value = ****** No cells with expected counts less than 5. a) Name the random variables present in the table above. b) Carefully define the null and alternative hypotheses of the Chi Square test underlying the generation of the above table. CO
Bullying,” according to noted expert Dan Olweus, “poisons the educational environment and affects the learning of every child.” Bullying and victimization are evident as early as preschool, with the problem peaking in middle school. Suppose you are interested in the emotional well-being of not only the victims but also bystanders, bullies, and those who bully but who are also victims (bully-victims). You decide to measure anxiety in a group of bullies and a group of victims using an 18-item, 5-point anxiety scale. Assume scores on the anxiety scale are normally distributed and that the variances of the anxiety scores are the same among bullies and victims. The group of 23 bullies scored an average of 40.1 with a sample standard deviation of 10 on the anxiety scale. The group of 28 victims scored an average of 46.8 with a sample standard deviation of 11 on the same scale. You do not have any presupposed assumptions about whether bullies or victims will be more anxious, so you formulate…
You want to estimate the percentage of adults who believe that passwords should be replaced with biometric security (such as fingerprints). How many randomly selected adults must you survey? Assume that you want to be 90% confident that the sample percentage is within 3.9 percentage points of the true population percentage. Complete parts (a) through (c) below. a. Assume that nothing is known about the percentage of adults who believe that passwords should be replaced with biometric security. The sample size needed is. (Round up to the nearest whole number as needed.) b. Assume that a prior survey suggests that about 47% of adults believe that biometric security should replace passwords. The sample size needed is. (Round up to the nearest whole number as needed.) c. Does the additional survey information from part (b) have much of an effect on the sample size that is required? The additional survey information from part (b) causes the required sample size to change by 10%. Based on…
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The human resource manager at a car dealership wants to know if the ages of its employees are related to the department that they work in. Data was compiled and tabulated in a 2-way contingency table. The employees were classified according to their age and department.Expected counts are printed below observed counts Sales Accounts Marketing Repairs Total 20-29 8 10 27 43 88 17.74 *** 26.20 23.62 30-39 29 26 38 22 * 23.18 26.72 34.24 30.86 40-49 33 32 72 82 219 44.15 50.88 65.20 58.77 50-59…

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