Testing of hypothesis for variance

Assignment Help Basic Statistics
Reference no: EM13108076

A random sample of 51 observations was selected from a normally distributed population. The sample mean was = 88.6, and the sample variance was s2 = 38.2. Does the sample show sufficient reason to conclude that the population standard deviation is not equal to 8 at the 0.05 level of significance? Use the p-value method.

Reference no: EM13108076

Questions Cloud

Why establishing rapport is good for the well-being : You have been told to establish rapport with the participants in a research study. Explain why establishing rapport is good for the well-being of the participant and also for the research study.
Regression analysis to predict monthly sales : Rocco wants to prepare the sales forecast for the next 24 months today. His company produces heavy-duty on/off timers used by large Christmas light displays and above ground swimming pool filters.
Test hypothesis by chi-squared test : A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.
Describe some of the problems with the researcher claim : In a small, fictitious country, a researcher has found that the higher a person lives up the big mountain, the more intelligent the individual is. Evaluate if there is a problem with the researcher claiming that living high on the mountain leads t..
Testing of hypothesis for variance : A random sample of 51 observations was selected from a normally distributed population. The sample mean was = 88.6, and the sample variance was s2 = 38.2.
Is competition primarily good or bad : is competition primarily good or bad? How does it contribute to our motivation and feelings of achievement when only one person is typically considered a "winner?" What would American business and athletics be like without our intense focus on com..
Formulating the null hypothesis : After receiving some complaints from the readers, a university newspaper decides to redesign its front page. Two new formats, B and C, were developed and tested against the current format, A.
Recognize the fallacy in biggest problem nuclear industry : Recognize the fallacy:It seems biggest problem nuclear industry has to deal with is not poor safety record, but lack of education of public on nuclear power. Thousands of people die each year from pollution created.
Goodness of fit application of chi-square : Create a scenario for applying the Goodness of Fit application of Chi-square. State the hypotheses, the level of significance, the result and its meaning.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Calculating correlation coefficient for the given data

Calculate the correlation coefficient and prediction equation.

  Demonstrating the effectiveness of the drug

To demonstrate the effectiveness of the drug, a researcher selects a sample of n = 25 children diagnosed with the disorder and measure each child's attention span before and after taking the drug.

  Advantage of a randomized experiment

What is the advantage of a randomized experiment in which the investigators randomly assign treatment conditions to subject over an observational study in which the subject self-select the treatment groups?

  Determining european call option binomial tree

A stock price is currently $100. Over each of the next two three-month periods, it is expected to increase by 10% or fall by 10%. Consider a six-month European call option with a strike price of $105.

  Regression equation abd sum of square for error

Determine SSE, SS (Total) and the explained sum of squared variation SSR and find the estimated y intercept slope and write the regression equation.

  Introduction of one way analysis of variance

Suppose that a researcher does a study to see how level of anxiety (A 1  = low, A 2  = medium, A 3  = high) is used to predict exam performance (Y).

  Schedule of expected cash collection

Farley purchases and pays for merchandise 60% in the month of acquisition and 40% in the following month. Accounts payable is used only for inventory acquisitions. How much cash will Farley receive during November?

  Standard normal curve and indicating the area

Drawing the standard normal curve and indicating the area representing the probability and

  Constucting the confidence interval for mean

The following data values are a simple random sample from a population that's normally distributed with (symbol for variance) o2=4.0:

  Randomly selected day-jail population

The average daily jail population in the United States is 706,242. If the distribution is normal and the standard deviation is 52,145, find the probability that on a randomly selected day the jail population is:

  Z-score be when comparing the babies

In Texas, 1991, the weights of babies, the mean birth weight for all babies is 3369 grams, with a standard deviation of 581 grams, (454 grams = 1 pound). Looking at a baby that weighed 16.1 lbs at birth: What would his Z-score be when compared to ..

  Predicting using the relative frequency table

Create a frequency table for the total number of people that prefer each type of music:

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