Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

A recent study by Allstate Insurance Co. finds that 82% of teenagers have used cell phones while driving (The Wall Street Journal, May 5, 2010). In October 2010, Massachusetts enacted a law that forbids cell phone use by drivers under the age of 18. A policy analyst would like to determine whether the law has decreased the proportion of drivers under the age of 18 who use a cell phone.

a. Select the null and the alternative hypotheses to test the policy analyst's objective.
b. Suppose a sample of 200 drivers under the age of 18 results in 150 who still use a cell phone while driving. What is the value of the test statistic? What is the p-value? (Negative values should be indicated by a minus sign. Round your intermediate calculations to 4 decimal places. Round "test statistic" to 2 decimal places and "p-value" to 4 decimal places.)
c. At α = 0.05 has the law been effective?
d. find out the critical value.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M998321

Have any Question? 


Related Questions in Statistics and Probability

A business student is interested in estimating the 99

A business student is interested in estimating the 99% confidence interval for the proportion of students who bring laptops to campus. He wishes a precise estimate and is willing to draw a large sample that will keep the ...

Researchers want to test the effectiveness of a new pain

Researchers want to test the effectiveness of a new pain medication. Four hundred people were recruited to participate in the clinical trial. In clinical testing, 55 out of 239 people taking the medication reported pain ...

Why is a z score a standard score why can standard scores

Why is a z score a standard score? Why can standard scores be used to compare scores from different distributions?

1 how do quasi-experimental designs differ from true

1. How do quasi-experimental designs differ from true experiments? 2. Under what circumstances would a researcher use a quasi-experimental rather than an experimental design?

1 why are researchers often interested in the proportion of

1. Why are researchers often interested in the proportion of total variance that is systematic variance? 2. What would the proportion of total variance that is systematic variance indicate if it were .25? .OO? .98?

Suppose that you wanted to study children who have down

Suppose that you wanted to study children who have Down syndrome. How might you use cluster sampling to obtain a probability sample of children with Down syndrome in your state?

The us express reported that the color distribution for

The US Express reported that the color distribution for plain M&M's was: 40%brown, 20% yellow, 20% orange, 10% green, and 10% tan. Each piece of candy in a random sample of 100 plain M&M's was classified according to col ...

Generally researchers are more concerned about making a

Generally, researchers are more concerned about making a Type I error than a Type II error. Can you think of any instances in which you might be more concerned about making a Type II error?

1 describe a mixed or split-plot factorial design this

1. Describe a mixed, or split-plot, factorial design. This design is a hybrid of what two other designs? 2. What is a main effect? 3. How many main effects can be tested in a 2 x 2 design? In a 3 x 3 design? In a 2 x 2 x ...

Suppose amongst all the families on a caribbean cruise the

Suppose amongst all the families on a Caribbean Cruise, the population variance of the number of children per family is 4. If we were to take a sample of 10 families, then the probability is .9 that the sample variance i ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro