Explain is claim believable if standard deviation is given

Assignment Help Basic Statistics
Reference no: EM13121970

A researcher claims that the standard deviation of the number of deaths annually from tornadoes in the U.S.A. is less than 30. If a sample of 9 randomly selected years had a standard deviation of 29, is the claim believable? Use = .01?

Reference no: EM13121970

Questions Cloud

Periodic inventory system : If a company uses the periodic inventory system, what is the impact on the current ratio of including goods in transit f.o.b. shipping point in the Purchases account and not in the Inventory account?
Accuracy or inaccuracy of sensory information : Write a two to three (2-3) page paper in which you: 1. Provide at least three (3) reasons for believing in the accuracy or inaccuracy of sensory information.2. Identify and describe at least three (3) factors contributing to the accuracy of se..
What volume will the balloon occupy : A 7.0 liter balloon at room temperature (22 degrees celsius) contains hydrogen gas. If the balloon is carried outside to where the temperature is -3.0 degrees Celsius.
Calculate the company free cash flow : During the current year it reported net income of $875,000. It had cash provided by operating activities of $734,000, paid cash dividends of $70,000, and had capital expenditures of $280,000. Calculate the company's free cash flow.
Explain is claim believable if standard deviation is given : Annually from tornadoes in the U.S.A. is less than 30. If a sample of 9 randomly selected years had a standard deviation of 29, is the claim believable? Use = .01?
To understand the cognitive/moral stage : Put yourself in the role of parent, teacher and juvenile justice judge and then in each role identify why it would be necessary to understand the cognitive/moral stage from which a child is operating. What are the most important aspects these develop..
Fahrenheit and standard deviation : The temperature(at a randomly selected time) is normally distributed with mean 83 degrees Fahrenheit and standard deviation 5 degrees. Find the following probabilities:
Question about prime numbers : There are infinitely many primes of the form n^2 - 1. Please list at least 4 of these primes. (I hope it is just as easy as I think, but is there any work to this?)
Could this be accomplished by passive diffusion : In the human body, the potassium ion can pass easily through cell membranes, yet the potassium ion concentration is higher inside many cells than it is outside these cells. Could this be accomplished by passive diffusion? Explain your answer.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Students seeking treatment at the school infirmary

Suppose that 1% of all the students seeking treatment at the school infirmary have mono. Of the students who do have mono, 90% complain of a sore throat. Of the students who do not have mono, 30% also have sore throats.

  Problem related to standard error of the mean

A random variable is normally distributed, with (population mean)= 300 pounds and (standard deviation) = 50 pounds. How small can a simple random sample be if the standard error of the mean can be no more than 20 pounds?

  Example of one sample t-test

A share tipping service claims that its selections give an average return of 10% if held for 12 months. An investor wants to investigate this claim and records the returns of the last 20 shares that have met the 12 month period.

  Creating table for frequency distribution

Create the table for frequency distribution that has 16 class intervals of width 1 inch. Utilize 61.5 inches as lower limit of first interval and 62.5 as upper limit.

  Proportions of defective chips

Two semiconductor factories are being compared to see if there is a difference in the average defect rates of the chips they produce. In the first factory, 250 chips are sampled. In the second factory, 350 chips are sampled. The proportions of def..

  Explaining population parameter or sample statistic

A recent survey by alumni of a major university indicated that average salary of 8000 of  its 250,000 graduates was $120,000.  Does this signify population parameter or sample statistic?

  Explain all seven steps and include the p-value

Assume the distribution of ages of homes follow an approximately normal distribution. Show all the seven steps and include the p-value.

  Increasing and decreasing allergic reactions

Assume that increasing and decreasing allergic reactions are equally likely if the training has no effect. Use alpha = .05

  Regression analysis-current salaries

Your employer asks you to determine whether current salaries (DV) can be predicted from years of experience (IV) What is the right statistical test one should use and why?

  Actual probability of having hiv positive

He is sorry but there is a 99.9% (1-0.001) chance that you have HIV. Is he correct? What is the actual probability that you are HIV positive?

  Resident at a level of significance

Is there a relationship between the opinion and the location of the resident at a level of significance of 0.05?

  Determining bivariate normal distribution

Cores on two tests have a bivariate normal distribution; and that correlation of 2 scores is 0.8. Determine the probability that sum of the student's scores on 2 tests will be greater than 200?

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!

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