User Account

All Pages

What is the probability that a randomly chosen student

Assignment Help Basic Statistics
Reference no: EM13916983

Question 1 - Track students were timed in the 100 yard dash. It was found that their times were normally distributed with a mean of 15 seconds and a population standard deviation of 2 seconds. Eighty percent of track students can complete the 100yard dash in less than what time?

1.

16.58

2.

.8416

3.

16.68

4.

13.32

Question 2 - The number of daily hits on the Excel Power user Workshop website is normally distributed with a mean of 100,000 with a population standard deviation of10,000. What is the probability of getting more than 85,000 hits on a given day?

.4404

.5596

.0668

.9332

Question 3 - It is estimated that the number of text messages sent daily by a high school student is normally distributed with a mean of 200 and a population standard deviation of 50. What is the probability that a randomly chosen student sent less than 210 text messages that day?

.5793

.4207

.8416

.7963

Question 4 - It is estimated that the number of text messages sent daily by a high school student is normally distributed with a mean of 200 and a population standard deviation of 50. The top ten percent send at least how many text messages?

264.078

135.922

155.492

239.543

Reference no: EM13916983

Questions Cloud

What is the probability that the battery will fail : Tests on a certain battery have determined that the mean (average) time until failure is 40 hours. Assume that the time T until failure of the battery is exponentially distributed. What is the probability that the battery will fail within 40 hours
What time will it take to pass a platform of 140 m long : A train 360 m long runs with a speed of 45 km/hr. What time will it take to pass a platform of 140 m long?
Cryptographic basis of the enigma machine : A 2,000-bit message is used to generate a 256-bit hash. One the average, how many other messages could be expected to generate the same hash value? What does this tell us about the length of a hash as compared to the length of the message?
How many 3-letter words with or without meaning : How many 3-letter words with or without meaning, can be formed out of the letters of the word, 'LOGARITHMS', if repetition of letters is not allowed?
What is the probability that a randomly chosen student : It is estimated that the number of text messages sent daily by a high school student is normally distributed with a mean of 200 and a population standard deviation of 50. What is the probability that a randomly chosen student sent less than 210 te..
Prepare a combined cash budget for the four months : Prepare a combined cash budget for the four months ending December 31, for two alternatives: weaving the place mats in cotton using the existing loom and weaving the place mats in linen using the new loom.
Influence of health policies-the future of health care : Based on the changing environment, as well as demographics in 21st Century America, there are many burgeoning issues and hurdles the U.S. Health Care System faces. As part of the preparation for your assignment, view the video titled "Health Care ..
How many different ways can the letters of the word : In how many different ways can the letters of the word 'OPTICAL' be arranged so that the vowels always come together?
The direction opposite to that of the trai : A train , having a length of 110 meter is running at a speed of 60 kmph. In what time, it will pass a man who is running at 6 kmph in the direction opposite to that of the trai

Reviews

Write a Review

Basic Statistics Questions & Answers

  What is the critical value of t using confidence level

A sample of 25 provided a sample mean of 14 and a sample standard deviation of 4.32. What is the value of "t" for this sample? For a 95% confidence level, what is the critical value of "t"?

  Provide a brief description of the main features

Provide a brief description of the main features of these data from the scatter plot and Describe why you would use performance as the predictor variable and performane related pay as the dependent variable in such a model.

  Sketching a histogram

Sketch a histogram of these data and give the modal class.

  Determining forecasting simulation

The number of cars arriving at Joe Kelly's oil change and tune-up place during the last 200 hours of operation is observed to be the following.

  Mean lifetime of light bulbs made by manufacturer differ

Can we conclude, at the level of significance, that the mean lifetime of light bulbs made by this manufacturer differs from months?

  Finding probability that neighbourhood is considered unsafe

If measurements are made over span of 9 months, and results are averaged, find out the probability that neighbourhood is considered unsafe?

  Random selected national sample of adults

The Gallup organization conducted a telephone survey with a random selected national sample of 1005 adults, 18 years and older. The survey asked the respondents, "How would you describe your own physical health at this time? "Response categories w..

  Explain important role in reducing standard error of mean

Why does the sample size play such an important role in reducing the standard error of the mean? What are the implications of increasing the sample size?

  Assuming that the company is advertising truthfully what is

uo luxury is a residential rental company that advertises that the average cost of a rental for undergraduate students

  Selecting a random sample from sessions

If you select a random sample of 100 sessions, what is the probability that the sample mean is between 7.8 and 8.2 minutes?

  Find persons correlation coefficient

Identify the Explanatory (X) and Response (Y) variable and find Persons Correlation Coefficient and determine if there exists a significant linear relationship.

  Is strong evidence that participation rate may have increase

The sports expert reported that 202 of 454 athletes in the random sample were women. Is this strong evidence that the participation rate may have increased?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd