Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Multiple choice problems based on the confidence interval and correlation.

1) Find the linear correlation coefficient, r, between x and y. x: 0, 3, 3, 1, 4 y: 1, 7, 2, 5, 5
a)r=.333  
b)r=.749  
c)r=.974  
d)r=.497  

 

2)Express the confidence interval .600, .800 in the form p-hat plus and minus E.
a).8 plus and minus .2  
b).6 plus and minus .2  
c).6 plus and minus .3  
d).7 plus and minus .1  

 

3)Find the critical value. 99% confidence, sigma is unknown, population is normal, n=15.
a)2.977  
b)1.645  
c)1.965  
d)3.360  

 

4) Listed below are intervals (in minutes) between eruptions of the Old Faithful Geyser in Yellowstone National Park. Find the median. 98, 92, 95, 87, 96, 90, 65, 92, 95, 93, 98, 94
a)95.7  
b)100  
c)91.3  
d)93.5  

 

5) In a study of brand recognition 831 consumers knew of Campbell's soup and 18 did not. Use the results to estimate the probability that a randomly selected consumer will recognize Campbell's soup.
a).021  
b).979  
c).777  
d).999  

 

6) A test consists of multiple choice problems, each having 4 possible answers (a, b, c, d), 1 of which is correct. Assume you guess the answers to 6 such problems. Find the probability that the first 2 guesses are wrong and the last 4 guesses are correct.
1).00220  
2).10  
3).02200  
4).667  

 

7)The mean and standard deviation of a normal distribution is 100 and 15 respectively. Find the probability that a value is between 110 and 120.
a).1382  
b).1596  
c).9404  
d).2179  

 

8)Construct the confidence interval for the population proportion where n=1200, x=800, 99% confidence.
a).632, .702  
b).612, .712  
c).368, .902  
d).512, .602  

 

9)A dietician obtains the amounts of sugar from 100 centigrams in each of 10 different cereals, including Cheerios, Corn Flakes, Froot Loops, and 7 others. Those values are listed below. Find the mean. 3, 24, 30, 47, 43, 7, 47, 13, 44, 39
1)34.5  
2)47  
3)25  
4)29.7

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M922001

Have any Question? 


Related Questions in Statistics and Probability

Paper should be between 800 and 1000 words in length it is

Paper should be between 800 and 1,000 words in length. It is due according to the due date on the course calendar. 1. Drawing on the readings and lectures, name at least three developments or factors that encouraged the ...

Joshua and his army are planning to circle jericho seven

Joshua and his army are planning to circle Jericho seven times. Will the wall come tumbling down? The king of Jericho reports that: I ascribe probability 0.8 to "the wall of the city will fall, and Joshua ascribes probab ...

Twenty years ago 40 children were born in the same hospital

Twenty years ago 40 children were born in the same hospital in Denmark. Researchers classified the children by whether or not they were breast-fed for at least 3 months. They were interested in whether breast-feeding ten ...

1 explain the rationale behind time series designs2

1. Explain the rationale behind time series designs. 2. Describe the simple interrupted time series design. 3. Why is contemporary history a threat to internal validity in a simple interrupted time series design?

Shoesmith wave inc a new and largely unproven economic

Shoesmith Wave, Inc., a new and largely unproven economic forecasting service, expects the inflation rate in South Korea to average 9 percent per year over the next five years. In comparison, Shoesmith expects a U.S. inf ...

What is the estimate for the difference between

What is the estimate for the difference between ‘False-rejects' by Inspectors 2 and 5? 0.8 3.7 4.2 0.0 3.5

1 distinguish between a quota sample and a purposive

1. Distinguish between a quota sample and a purposive sample. 2. What three criteria characterize good descriptions of data?

1 a successive independent survey design and a longitudinal

1. A successive independent survey design and a longitudinal survey design both examine changes in responses over time. How do they differ in their approach? 2. Distinguish between demographic and epidemiological researc ...

A researcher evaluates a gun training program in a large

A researcher evaluates a gun training program in a large American city found that rapes dropped by 90% in the year following the training. Researchers looking at the same data but expanding the time frame to include 5 ye ...

A researcher was interested in whether people tend to marry

A researcher was interested in whether people tend to marry individuals who are about the same level of physical attractiveness as they are. She took individual photographs of 14 pairs of spouses. Then, she had 10 partic ...

  • 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

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

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen