Question

Asked Dec 3, 2019

127 views

Consider the data below. Suppose that in the aerobic exercise group we also measured the number of hours of aerobic exercise per week; the mean is 5.2 hours with a standard deviation of 2.1 hours. The sample correlation is -0.42. a) Estimate the equation of the regression line that best describes the relationship between number of hours of exercise per week and HDL cholesterol level (Assume that the dependent variable is HDL level). b) Estimate the HDL level for a person who exercises 7 hours per week. c) Estimate the HDL level for a person who does not exercise.

Exercise Group | N | Mean | Standard Deviation |

Weight Training | 20 | 49.7 | 10.2 |

Aerobic Exercise | 20 | 43.1 | 11.1 |

Stretching/Yoga | 20 | 57.0 | 12.5 |

Step 1

It is given that the sample correlation is –0.42.

Step 2

a.

The slope of the regression equation is obtained as follows:

Step 3

The intercept is obtained as follows:

...Tagged in

Q: What method of testing would I use in PHStat within Excel to solve this problem? I used the 2 sample...

A: Here, the claim is that there is evidence that unionization often leads to failure to maintain stand...

Q: 15) A recently televised broadcast of 60 Minutes had a 15 share, meaning that among 5000 monitored h...

A: The given information isObserved proportion (O) =15% = 0.15Expected proportion (E) =20% = 0.2Set up ...

Q: 40) A four-year university has decided to implement a new approach to teaching Statistics. Full-time...

A: From the given information,

Q: Explain the difference between an independent and dependent sample. Give an example of each.

A: Dependent samples:The two samples are said to be dependent if there exist an effect of one on anothe...

Q: According to a report, the standard deviation of deviation of monthly cell phone bill was $48.93 t...

A: a).The null and alternative hypotheses are given below:

Q: 16) A simple random sample of 24 filtered 100 mm cigarettes is obtained and the tar content of each ...

A: The provided information is:

Q: 6.0. Help -1 If op2 5 and nq 2 5, estimate P(at least 3) with n 13 and p 05 by using the normal dist...

A: Given datan = 13p = 0.5np = 13 x 0.5 = 6.5 > 5nq = 13 x (1 – 0.5 ) = 6.5 > 5So, conditions for...

Q: Consider a two-tailed test with a level of confidence of 80.30%. What is the z-value?

A: It is given that the level of confidence is 80.30%. Thus,

Q: Listed below are prices in dollars for one night at different hotels in a certain region. Find the r...

A: Step-by-step procedure to obtain the range, variance, and standard deviation using Excel:In Excel sh...