Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

problem 1:

a) The following table lists the values of a variable and their probabilities. Verify if the table represents a valid probability distribution, giving reasons for your answer.

454_probability distribution table.jpg

b) find out the expected value and the standard deviation of X.

c) Determine P(-1 ≤ X < 1)

problem 2: Laboratory tests on a large shipment [several thousands] of radios revealed that 6.5% are defective. On arrival of the shipment at the local distributor, 30 of the radios were randomly selected for a promotion.
 
a) Define the random variable for this situation and list its values.
 
b)

  • What in your view is the probability distribution of this variable? State the conditions that influence your choice of distribution.      
  • find out the probability that at most two (2) radios will be defective.

c) From a randomly selected sample of 200 radios from the shipment, what is the probability that less than 20 are defective? 

problem 3: On a given week day, customers join a line at the teller window in a credit union at a rate of 12 per hour. The number of customers arriving at this teller line during any given hour on Fridays follows a Poisson probability distribution.
 
a) Define the random variable in this situation and list all its possible values.
 
b) State the value(s) of the parameter(s) of the distribution described above.
 
c) find out the probability that between 9 to 11 customers inclusive will join the teller line during the first hour of next week Friday.

d) find out the probability that 30 customers will join the teller line during the first two hours of next week Friday.

problem 4:
 
a) A survey was conducted to measure the number of hours per week adults spend on home computers. In the survey, the number of hours was normally distributed, with a mean of 8 hours and a standard deviation of 1 hour. A survey participant is randomly selected. Find the probability that the hours spent on the home computer  by the participant are between 5.5 and 9.5 hours per week.
 
b) The grades for the Statistics final exam of a large class are normally distributed with a mean of 42 and a standard deviation of 16. The examiner is to assign Grades according to the following rule:

Grade A: top 10%
Grade B: the next 20%
Grade C: the middle 40%
Grade D: the next 20%
Grade F: the bottom 10%

1946_grades of final exam.jpg

Find the lowest score on the final exam that would qualify a student for a Grade B?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M92510
  • Price:- $70

Priced at Now at $70, Verified Solution

Have any Question? 


Related Questions in Statistics and Probability

What would the null and alternate hypothesis be for the

What would the null and alternate hypothesis be for, " The airlines claim that complaints average less than 15 per month per airport. To investigate the problem an independent watchdog agency contacted a random sample of ...

How did religion shape indian reaction to white settlement

How did religion shape Indian reaction to white settlement in the nineteenth century?

1 why do researchers use inferential statistics2

1. Why do researchers use inferential statistics? 2. Distinguish between the null hypothesis and the experimental hypothesis. 3. When analyzing data, why do researchers test the null hypothesis rather than the experiment ...

On a 2-d regular not wrapped-around mesh a message from a

On a 2-D regular (not wrapped-around) mesh, a message from a source (X s , Y s ) is to be sent to a destination (X d , Y d ). If any shortest path can be used, what is the probability that the message follows the shortes ...

Use a fast food restaurant and for 5 types of food from the

Use a fast food restaurant and for 5 types of food from the restaurant, list the fat grams and its total calories. Is there a linear relationship between the two variables? The double whopper has 900 calories and 56 gram ...

Holiday fruit company buys oranges and processes them into

Holiday Fruit Company buys oranges and processes them into gift fruit baskets and fresh juice.  The company grades the fruit it buys on a scale from 1 (lowest quality) to 5 (highest quality).  The following summarizes Ho ...

Why would the following hypothesis not work for anova

Why would the following hypothesis not work for anova problem? H0: μ1=u2=u3=u4 and H0: μ1≠u2≠u3≠u4 What does the y-intercept represent in terms of linear analysis (and linear regression analysis) and give an example of h ...

The mean incubation time for a type of fertilized egg kept

The mean incubation time for a type of fertilized egg kept at 100.7° F is 22days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 2 days. (a) The probability that a r ...

John is an avid fisherman and wants to know if there is a

John is an avid fisherman and wants to know if there is a correlation between the amount of time he spends fishing and the amount of fish he catches. He decided to keep track of the time he spent at the lake and the amou ...

A spinoff of the anti-war and civil rights movements of the

A spinoff of the anti-war and civil rights movements of the 1960s that affected women was? increased desire to return to the security of homes and families decreased political involvement. the birth of the women's libera ...

  • 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