Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

1) The average length of actual running time (excluding advertisements) for television feature films is 1 hour and 40 minutes, with a standard deviation of 15 minutes. If a sample of 49 television feature films is taken at random, what is the probability that the average running time for this group is 1 hour and 45 minutes or more?

2) A quality control engineer is concerned about the breaking strength of a metal wire manufactured to stringent specifications. A sample of size 25 is randomly obtained, and the breaking strengths are recorded. The breaking strength of the wire is considered to be normally distributed with a standard deviation of 3. Find a 95% confidence interval for the mean breaking strength of the wire.

26, 27, 18, 23, 24, 20, 21, 24, 19, 27, 25, 20, 24, 21, 26, 19, 21, 20, 25, 20, 23, 25, 21, 20, 21.

3) An investment advisor believes that the return on interest-sensitive stocks is approximately normally distributed. A sample of 24 interest-sensitive stocks was selected, and their yearly return (including dividends and capital appreciation) was as follows (in percentages):

11.1, 12.5, 13.6, 9.1, 8.7, 10.6, 12.5, 15.6, 13.8, 8.0, 10.9, 7.6
5.2, 1.2, 12.8, 16.7, 13.9, 10.1, 9.6, 10.8, 11.6, 12.3, 12.9, 11.6

Find a 90% confidence interval for the mean yearly return on the interest-sensitive stocks.

4) If a sample size of 70 was necessary to estimate the mean of a normal population to within 1.2 with 90% confidence, what is the approximate value of the standard deviation of the population?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M943895

Have any Question? 


Related Questions in Statistics and Probability

Explain how you would conduct the study you designed in

Explain how you would conduct the study you designed in Question as a matched-subjects design. Question:- Design a randomized groups experiment to test the hypothesis that children who watch an hour-long violent televisi ...

Question a survey found that an american family generates

Question: A survey found that an American Family generates an average of 17.2 lb of glass garbage each year. Assume that the standard deviation of the distribution is 2.5 pounds. If a sample of 55 families is randomly se ...

Question to qualify for security officers training recruits

Question: To qualify for security officers training, recruits are tested for stress tolerance. The scores are normally distributed with a mean of 62 and a standard deviation of 8. If only the top 15% of recruits are sele ...

Problem 1somewhere in the milky way galaxy a class of 2000

Problem 1 Somewhere in the Milky Way Galaxy, a class of 2,000 students took a course in Astronomy.  The first exam scores and the final exam percentage reached earth, but transmission broke off after only a dozen student ...

Case study mikhail gorbachevs 1988 un speechif the pace of

Case Study: Mikhail Gorbachev's 1988 UN SpeechIf the pace of improving US-Soviet relations seemed rapid, Mikhail Gorbachev's speech to the United Nations General Assembly would shift the process into overdrive.  In this ...

A population of lawnmowers life expectancy is described

A population of lawnmowers' life expectancy is described with a Weibull distribution, where α=1 and β=15. Determine 1× (once) and 2× (twice) the expected mean lifes for the population, as well as their corresponding cumu ...

Find the indicated area under the standard normal curve to

Find the indicated area under the standard normal curve. To the left of z= - 1.96 The area to the left of z = -1.96 under the standard normal curve is __.(Round to four decimal places as needed.)

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 ...

1 prove that every complete irreflexive and transitive

1. Prove that every complete, irreflexive, and transitive relation is asymmetric: if x ≠ y, then x > y if and only if y x. 2. Prove that the Gale-Shapley algorithm for finding a stable matching satisfies the following pr ...

The percentage of people who recycle their old phone books

The percentage of people who recycle their old phone books is 15.8% on average. If 240 people are randomly selected, what is the probability that more than 20% of them recycle their phone books?

  • 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