Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Objective type problems based on the Confidence interval and regression.

1) Mean=63.6 Standard deviation=2.5 If 36 data points are randomly selected, find the probability that the mean is less than 64.
a. .3815  

b. .8315  

c. .1685  

d. .5183  

2) Express the confidence interval .600, .800 in the form p hat plus and minus E.

a. .700 plus and minus .005  

b. .700 plus and minus .500  

c. .700 plus and minus .010  

d. .700 plus and minus .100  

3) Find the 95% confidence interval of the population mean, given n=90, x bar=66.2 and standard deviation=3.4.

a. 34.5, 35.5  

b. 33.1, 34.5  

c. 60.0, 70.0  

d. 65.5, 66.9  

4) 1,025 randomly selected adults were surveyed and 29% of them said they used the internet for shopping. Find a 99% confidence interval for the proportion of adults who use the internet for shopping.

a. .253, .326  

b. .200, .300  

c. .203, .303  

d. .214, .316  

5) Claim u=75. Sample data n=15, x bar=66, s=12. Sigma = 14. Which distribution should be used to test the claim that the population mean=75.

a. Student t  

b. Normal  

c. Binomial  

d. None of these  

6) The mean lifespan of desktop PCs is less than 7 years. Assume data come from a normal population. n=21, x bar=6.8, s=2.4, alpha=.05 Compute the critical t value of the data.

a. +1.725  

b. -1.645  

c. -1.725  

d. +1.645  

7) Find the equation of the regression line from the following data: x: 1, 1, 2, 5, 3 y: 0, 2, 2, 3, 5

a. y hat = .333 + .667x  

b. y hat = .857 + .643x  

c. y hat = .643 + .857x  

d. y hat = 10 + x  

8) Find the equation of the regression line. x: 0, 2, 1, 4, 8 y: 6, 5, 4, 0, 6

a. y hat = 2.275 - 0.025x  

b. y hat = 4.725 + 0.065x  

c. y hat = 4.275 - 0.025x  

d. y hat = 3.275 - 0.035x

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M922399

Have any Question? 


Related Questions in Statistics and Probability

Uncertain scenario-maximizing the meanthe potential

Uncertain Scenario-Maximizing the Mean The potential revenues of all projects are in fact uncertain. The company determines that the revenue for project 1 is following a uniform distribution ranging from $1,200,000 to $2 ...

Tables or graphsusing the internet the text or another

Tables or Graphs Using the Internet, the text, or another reliable source such as a newspaper or periodical site, (not a scholastic or school site like Khan Academy and not Wikipedia), research some important data that h ...

1 when do researchers use regression analysis2 what is

1. When do researchers use regression analysis? 2. What is multiple regression analysis? 3. Distinguish among simultaneous (or standard), stepwise, and hierarchical regression.

A bakery was taken to court for selling loaves of bread

A bakery was taken to court for selling loaves of bread that were underweight. These loaveswere advertised as weighing 24 ounces. In its defense, the bakery claimed that the advertisedweight was meant to imply not that e ...

Assignmentstatistical analysisdirections be sure to save an

ASSIGNMENT Statistical Analysis Directions: Be sure to save an electronic copy of your answer before submitting it to Ashworth College for grading. Unless otherwise stated, answer in complete sentences, and be sure to us ...

I love juliet and i know that juliet loves me but i do not

I love Juliet, and I know that Juliet loves me, but I do not know if Juliet knows that I love her. Provide an Aumann model of incomplete information that describes this situation, and specify a state of the world in that ...

St augustine and socrates both acknowledge that the perfect

St. Augustine and Socrates both acknowledge that the perfect city cannot exist in this world. For each of them, what is it about the nature of human beings and of political life that makes this impossible?

One of the behavioral research case studies involved agocha

One of the Behavioral Research Case Studies involved Agocha and Cooper's (1999) study of partner characteristics and intentions to practice safe sex. Below are the Pearson correlations between the likelihood that partici ...

This exercise generalizes exercise 925 let n y fi fii s p

This exercise generalizes Exercise 9.25. Let (N, Y, F I , F II , s, P) be an Aumann model of incomplete information with beliefs in which N = {I, II} and let A ⊆ Y be an event. Consider the following process: Player I in ...

An alternative to the experiment in q3 to investigate

An alternative to the experiment in Q.3 to investigate whether loud music tends to increase the time it takes mice to complete a maze would involve randomly assigning say, 50 mice to two groups. The 25 mice in Group A (c ...

  • 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