Regression coefficient statistically significant

Assignment Help Basic Statistics
Reference no: EM1390070

A social worker randomly selects 28 households with children. He finds a correlation coefficient of -0.21 between average weekly work hours of the parents and the happiness index of the children in that household. Is this correlation statistically significant? He also found the regression coefficient to be -1.66. Is this regression coefficient statistically significant? Explain why or why not for each.

Reference no: EM1390070

Questions Cloud

Probability that at least one dice showing six : Founder of modern probability and statistics theory Cardano asserted that if one throws a die three times the chance that a given number will show at least once is 50 percent. This is now recognized as the wrong answer. Calculate, what is a probab..
Mean from frequency distributions : Determine the estimated mean of the following frequency distribution. A sample of the amounts paid for parking on Saturday at the Downtown Parking Garage in Toronto was organized into the following frequency distribution.
Compute the number of acetyl scoa molecules : Compute the number of acetyl-SCoA molecules generated by complete? oxidation of a 12-carbon activated fatty acid.
Invested in a stock that is returning : Assume that you have $165,00 invested in stock that is returning 11.50%,$85,000 invested in a stock is returning 22.75% and $235,000 invested in a stock that is returning 10.25%
Regression coefficient statistically significant : Is this correlation statistically significant? He also found the regression coefficient to be -1.66. Is this regression coefficient statistically significant? Explain why or why not for each.
Level of measurement-class intervals : Determine the level of measurement for these items related to the newspaper business? The following data gives the weekly amounts spent on groceries for sample of households.
Difference between heme and nonheme iron : Describe and discuss the difference between heme and nonheme iron. How can the efficiency of absorption be increased for both types of iron?
Representative of the population of the united states : Given that this sample is extremely large, can the responses be considered to be representative of the population of the United States? Explain.
Describe some adaptations in the flora of this biome : The following information came from an undisclosed area of the globe. Your mission, should you choose to accept it, is to determine where this climatological data set originated.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Relationship among variables is sufficient to warrant

Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.

  Variation between two populations

The means appear to be very close, but not the variances. At  α   = .05, is there a difference in variances? Show all steps clearly, including an illustration of the decision rule.

  Determining sample size requirements

Determine sample size requirements. When the results are available you would like your margin of error to be plus or minus 5% for the satisfaction measure and plus or minus $1.50 for the spending value.

  Expected value of sample information

What's the expected value of sample information? How much might the physicians be willing to pay for a market study?

  Illustrate what is the criterion of realism value

Criterion of realism or Hurwitz. Assume that the payoff from an investment depends on market conditions. Illustrate what is the criterion of realism value.

  Random sample and normal distribution

Suppose that X1,..,Xn form a random sample from the normal distribution with unknown mean M and unknown standard deviation S, and let m and s denote the MLEs of M and S. for the sample size n=17, find a value of k such that  P(m > M +ks) = 0.95

  Consistent with the scatterplot

Which of the following statements is consistent with the scatterplot

  Significance differences among the population mean

Using α = .05 test for significance differences among the population mean wasted time for theses three urban areas. What is the p-value? What is your conclusion?

  Trucks significantly having lower accident rate

Test the proportions of yellow fire trucks have a significantly lower accident rate.

  Fitting of simple linear equation

Fitting of simple linear equation - Prepare an equation showing how daily sales are related to number of customers per day.

  Finding correlation coefficient of determination-explanation

Find the percentage of the total variation that cant explained by the linear relationship between the two variable.

  Evaluating probability that patient will take drug

Evaluate the probability that patient taking drug will experience flu symptoms.

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