Correlation coefficient-regression analysis

Assignment Help Basic Statistics
Reference no: EM1396013

Construct a scatterplot for the (x, y) values below, and answer the following questions.

x y

1 -10.0

2 -20.0

3 -30.0

4 -40.0

5 -50.0

Questions:

- What would be the slope of this regression line?

- Would the correlation between x and y be positive or negative?

- How would you interpret these data in terms of linear regression?

Reference no: EM1396013

Questions Cloud

Claiming to accept an error rate : The average speed of greyhound dogs is about 18.8 meters per second. A particular greyhound breeder claims that her dogs are faster than the average greyhound. In a sample of 45 dogs, they ran, on average, 19.2 meters per second with a standard de..
Depolarization of the muscle cell : A microelectrode provides a current pulse that depolarizes the axon-just above threshold. Describe the events that occur immediately after reaching threshold.
How she injured her left ankle also foot : Mercedes fell while trying to cross a 6-inch-deep stream while the tour group was on a walking tour to see hippopotami in a river at a game reserve. In the process, she injured her left ankle also foot. She sued Samuelson for damages. Is Samuelson..
What metabolic feature of the bacterium is useful to plant : What is the metabolic exchange between rhizobia and their plant hosts? What does the plant provide in addition to carbon and how does leghemoglobin play a role in this? What metabolic feature of the bacterium is useful to the plant.
Correlation coefficient-regression analysis : Construct a scatterplot for the (x, y) values below, and answer the following questions. What would be the slope of this regression line?
How can the two be distinguished based on analysis of dna : What is the difference between background selection and a selective sweep? How can the two be distinguished based on analysis of DNA sequences.
Describe power also leadership also the two areas around : Describe Power also Leadership also the two areas it is organized around. Explain why is it important to be able to Lead Across Cultures? Explain why Do Some Leaders Fail?
Estimate the definition of carrying capacity : A continuously growing population has a population size of 1,000 and an intrinsic rate of increase of r = 0.05 per year. Assuming that this rate of increase remains the same, about how long should it take for the population to reach 4,000?
Weaknesses of correlational and regression studies : Discuss the strengths and weaknesses of correlational and regression studies; discuss concepts such as positive and negative correlations, correlation coefficients, confounding, and causality.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Confidence interval of the mean of a given sample

Which of the following is true about a 95% confidence interval of the mean of a given sample:

  Least square regression model scatter diagram

Find the equation of least -squares line and plot the line on the scatter diagram of part (a)

  Margin of error at confidence level

Suppose among 312 large city residents sampled, 65 refused to cooperate.  What is the margin of error at the 95% confidence level.

  Case study-ohio company

Ohio Company provided the following information regarding its only product--ice skates.

  Standard deviation-computational formula

The bank wants to find out the waiting time of their customers during the Friday evening hours from 5pm to 8pm. Using the data in ungrouped form, compute the Standard Deviation, using the computational formula.

  Performing the hypothesis test with significance level

Set up the null and alternative hypotheses, and perform the hypothesis test with a significance level of 0.05.

  Distinction between descriptive and inferential statistics

Critically discuss the main differences between descriptive and inferential statistics? Provide an example of either type of statistics either from a recent study you heard about or a made up study you'd be interested in learning about.

  Relationship bewtween r value and correlation strength

A linear correlation coefficient very close to 0 implies that there is a linear correlation between the averages, but a correlation between the averages does not imply a correlation between individuals as the conclusion incorrectly suggest.

  Percentiles of known normal distributions

All standard IQ test scores are normally distributed and are set up so that the mean score is 100. However, the standard deviation differs from test to test.

  Numerator and in the denominator of the f ratio

One advantage of the repeated measures ANOVA is that it eliminates "individual differences" as a source of variability. Explain why there are no individual differences in the numerator and in the denominator of the F ratio.

  Information about qualitative and quantitative variables

Can you please give one example of a Qualitative data and one example of a Quantitative Data that you face daily? Please explain why it is a Quantitative or Qualitative data and describe the scale of measurement.

  Sample sufficient to demonstrate a significant effect

If the population standard deviation is s = 10, is the sample sufficient to demonstrate a significant effect? Again, assume a two-tailed test with a = 0.05.

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