Correlation between the variables

Assignment Help Basic Statistics
Reference no: EM1311230

A sociologist claims that the success of students in college (measured by their GPA) is related to their family's income. For a sample of 20 students, the coefficient of correlation is 0.40. Using the 0.01 significance level, can we conclude that there is a positive correlation between the variables?

Reference no: EM1311230

Questions Cloud

The full annealing heat treatment : Describe the full annealing heat treatment for a plain carbon steel.
Explanation of social welfare under tariff : What is autarky price and quantity equilibrium for both home and foreign? What is the open trade price and volume under free trade.
Computation of yield from investment : Computation of yield from investment thus it is therefore well known that profits may be slim nowadays
Determine actual cost and operating data : At the end of the year, the firm's records revealed the following actual cost and operating data for all cases handled during the year.
Correlation between the variables : Using the 0.01 significance level, can we conclude that there is a positive correlation between the variables?
Evaluation of profitable investment : If you can borrow (and lend) money at an interest rate of 8 percent, will the investment be a profitable undertaking? Is the project profitable at an interest rate of 12 per cent? Provide numerical calculations in support of your answers.
Evaluate the total cost charged to case : Evaluate the total cost charged to Case 618-3? Show computations by department and in total for the case.
Probability in random selection : A recent census of a small town in Michigan showed that 60% of the residents are male, 20% have college degrees, and 15% are both male and college graduates.
Cartel behavior and price discrimination strategy : Assume that the soft coal industry is a competitive industry and it is in long run equilibrium. Now assume that the firms in the industry form a cartel.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Statistics test paper

Answer the following three questions based on what you know about statistics now.

  What are the upper and lower control limits

When using past data, I have found that the proportion of items rejected by quality control personnel is about 3%. We normally make 5000 items per day. For a p chart, what are the upper and lower control limits?

  Find the confidence interval for the mean

How strong is the evidence against the company's claim? Based on these data, the P -value of the appropriate test

  Evaluate the confidence interval

The 50 members of the placebo group had blood pressure lowered by an average of 15 points with standard deviation 8 points. To analyze this information we will use a, When testing whether or not the increases in spending are different, the test is ..

  What conclusion can be made from this study

It has been claimed that women live longer than men; however, men tend to be older than their wives. Ages of sixteen husbands and wives from England were obtained. The null hypothesis of equality of means is rejected. What conclusion can be made f..

  Observational and sample study

A statistics instructor wants to know which route will get her to school the fastest. Each day from October 2 to November 15, when she gets to the turn point she checks the odometer on her car

  Find the interquartile range of the salaries

Suppose each employee in the company receives a $3000 raise for next year (each employee's salary is increased by $3000). The interquartile range of the salaries will

  The correct set of hypotheses

How many commercials' worth of data do I need to have a margin of error no more than 3, the correct set of hypotheses

  Probability that the psychic correctly identifies the symbol

A noted psychic was tested for ESP. The psychic was presented with 400 cards face down and asked to determine if each card was marked with one of four symbols: a star, cross, circle, or square. The psychic was correct in 120 cases. Let p represent..

  Normal distribution

Mean threshold values and standard deviations for the three groups are given below. Normal probability plots showed the three populations were well approximated by the Normal distribution.

  Biggest problem facing education today

Survey on What do you think is the biggest problem facing education today. One problem with exit polls may be that the wrong "key precincts" were chosen.

  What is the explanatory variable in this study

Use the list of random digits below to assign 4 men and 2 women to the shark fin treatment. Read the table from left to right, first selecting the 4 men and then the 2 women. Use the numerical labels given in the chart to the names.

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