What is the expected number of smokers

Reference no: EM131418566

Suppose that, as reported by the Centers for Disease Control, about 30% of high school students smoke tobacco. You randomly select 120 high school students to survey them on their attitudes toward scenes of smoking in the movies.

a) What's the expected number of smokers?

b) What's the standard deviation of the number of smokers?

c) The number of smokers among 120 randomly selected students will vary from group to group. Explain why that number can be described with a Normal model.

d) Using the 68 - 95 - 99.7 Rule, create and interpret a model for the number of smokers among your group of 120 students.

Reference no: EM131418566

Questions Cloud

Large retailer headquartered in arkansas : You're the business unit president of your company, which is a large retailer headquartered in Arkansas. Your competitors have advanced into Canada and you wish to do so as well. Your real estate team has determined that it would be easier and m..

Describe the characteristic of the workforce : Select an organization that you are familiar with. It can be the organization you currently work for or one that you have worked for in the past. Describe the characteristic of the workforce and the level and types of diversity in the organisation

What is the probability that molly will pass statistics : What's the probability that Molly will pass Statistics?- At the end of the semester, we find out that Molly failed. What's the probability that she got Professor Kurtosis?

Four of these six topics for your final written assignment : Select any four of these six topics for your Final Written Assignment and address each question comprehensively: It has been said that "a company that deserves a union gets one," suggesting that if proper leadership and motivation techniques are e..

What is the expected number of smokers : The number of smokers among 120 randomly selected students will vary from group to group. Explain why that number can be described with a Normal model.

Measuring performance includes assessment of competencies : 1. A behavior approach to measuring performance includes the assessment of competencies. Briefly explain the difference between a threshold competency and a differentiating competency.

Advantages and disadvantages of working with global teams : Discuss both the advantages and disadvantages of working with global teams. If you worked on a global team how would you address the disadvantages?

How cisco values its inventory on the balance sheet : Discuss how the concepts of objectivity, conservatism, and market value enter into how Cisco values its inventory on the balance sheet.

Explain why the facts you know about variances : Explain why the facts you know about variances of independent random variables might encourage two small insurance companies to merge.

User Account

All Pages