The correlation between two variables is -063 for a sample

Assignment Help Basic Statistics

Reference no: EM13602907

1. The diameter of a spindle in a small motor is supposed to be 5 mm. If the spindle is either too small or too large, the motor will not work properly. The manufacturer measures the diameter in a sample of motors to determine whether the mean diameter has moved away from the target. What are the null and alternative hypotheses (H0 = null hypothesis and Ha = alternative hypothesis)?

A.H0: Mean= 5 and Ha: Mean is not equal to 5

B.H0: Mean = 5 and Ha: Mean <5

C.H0: Mean < 5 and Ha: Mean > 5

D.H0: Mean = 5 and Ha: Mean > 5

2. The correlation between two variables is -0.63 for a sample of 20 observations. What is the coefficient of determination between the two variables?

A.0.63

B.0.3969

C.0 .7937

D.None of the above.

3. In simple linear correlation analysis

A.We consider several dependent variables.

B.We study the strength of the association between two variables.

C.We consider the intercept with the Y-axis.

D.None of the above.

4. The sample correlation coefficient

A.Has the same sign as the slope, i.e. b.

B.Can range from -1.00 up to 1.00

C.Is also called Pearson's r.

D.All of the above.

Reference no: EM13602907

Questions Cloud

Draw profit diagrams for the following positions a 1050- : draw profit diagrams for the following positionsa 1050- strike sampr straddleb written 950-strike sampr straddlec

On 1 july 2011 cladd ltd leased a tractor from ally ltd the : on 1 july 2011 cladd ltd leased a tractor from ally ltd. the tractor cost ally ltd 120697. the lease agreement

Calculate the activity of uranium-238 in 100 grams of : calculate the activity of uranium-238 in 100 grams of uranium ore containing 5 weight percent u308. what is the

Suppose a 20 per unit sales tax is imposed on consumers : 1. in a competitive market the industry demand and supply curves are p 200 - .2qd and p 100 .3qs respectively.a. find

The correlation between two variables is -063 for a sample : 1. the diameter of a spindle in a small motor is supposed to be 5 mm. if the spindle is either too small or too large

Test the hypothesis that the two process have identical : two processes are used to produce forgings used in an aircraft wing assembly. of 200 forgings selected from process 1

Calculate the value of a rs 5000 bond paying interest at : calculate the value of a rs. 5000 par value bond paying interest at anannual coupon interest rate of 10 with 10 years

Question calculate the change in the amount of : question calculate the change in the amount of bremsstrahlung that would be produced if an aluminum target were

The slope of a regression equation is 10 the value where : 1. suppose we developed the following least squares regression equation y 3.5 2.1x. which of the following statements

User Account

All Pages