The physical dataset on the companion website gives heights, Ask an Expert

Statistics

The physical dataset on the companion website gives heights (inches) and head circumferences (cm) for a sample of college students. For females only, the correlation between the two variables is 0.05, while for males only, the correlation is 0.19. For the combined sample of males and females, however, the correlation is 0.42. Explain why the correlation in the combined sample is higher than the correlations in the separate samples of males and females. Refer to given Example for guidance.

Example
Does It Make Sense? Height and Lead Feet For a sample of college students, a scatterplot of their heights and their responses to the question "What is the fastest you have ever driven a car?" is displayed in given Figure.

1275_Graph 6.jpg

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M92214534

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

An equally weighted portfolio consists of 41 assets which

An equally weighted portfolio consists of 41 assets which all have a standard deviation of 0.137. The average covariance between the assets is 0.118. What is the standard deviation of this portfolio expressed as a percen ...

As an experiment the investigators decided to take two

As an experiment, the investigators decided to take two measurements on the patient. One measurement will be made using the precise machine (withσI= 5) and the other will be made using the less precise machine (withσII= ...

What statistic was calculated to determine differences

What statistic was calculated to determine differences between the intervention and control groups for the lumbar and femur neck BMDs? Were the groups significantly different for BMDs?

The following is a partial relative frequency distribution

The following is a partial relative frequency distribution of grades in an introductory statistics course. Grade Relative Frequency A .22 B ? C .18 D ...

Confidence1the daily sales of burger baby restaurants

Confidence 1.The daily sales of Burger Baby restaurants follow the normal distribution with a standard deviation of $4000. a. A sample is taken of 50 restaurants and the average sales were $40,000/day. What is the 99% co ...

Determine the margin of error for an 80 confidence interval

Determine the margin of error for an 80?% confidence interval to estimate the population mean when s? = 36 for the sample sizes below. ?a)n=12 ?b)n=26 ?c)n=54 ?a) The margin of error for an 80?% confidence interval when ...

If you are constructing a confidence interval for a

If you are constructing a confidence interval for a population mean, for the same confidence level, the width of the confidence interval will __________ as the sample size increases. Decrease Increase Stay the same Depen ...

A student is to be selected randomly from a group of

A student is to be selected randomly from a group of students. For each classification of freshman and sophomore, there is a math major, an art major, and a biology major. The probability of each individual being selecte ...

How does wholesale banking differ from retail banking in

How does wholesale banking differ from retail banking in terms of: (a) product range; (b) client coverage; (c) marketing; (4) risk management; (5) pricing.

In a management trainee program 80 of the trainees are

In a management trainee program 80% of the trainees are female, 20% male, A total of 90% of the females attended college, while 78% of the males attended college. A management trainee is selected at random. What is the p ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert