43) Which is not true for error term epsilon()?

Select one:

a.The variance of epsilon (), denoted by sigma square, is the same for all values of the independent variables.

b.The values of epsilon ()are independent.

c.The error epsilon()is a random variable with mean of one.

d.The error epsilon()is a normally distributed random variable

44) Which of the following is more appropriate about the Student's t distribution?

Select one:

a.It has more area in the tails and less in the center than does the normal distribution and it is bell shaped and symmetrical.

b.It is used to construct confidence intervals for the population mean when the population standard deviation is known.

c.It has more area in the tails and less in the center than does the normal distribution.

d.It is bell shaped and symmetrical.

45) Xiamen University decide to conduct a survey of students cheating on their online exam andassignment. In the survey of 200 students, 58% of the students cheat on an online exam, 50% cheat onassignment. Construct a 95% confidence interval estimate of the population proportion of students who cheat on the online exam.

Select one:

a.0.5116 to 0.6484

b.0.5196 to 0.6494.

c.0.5016 to 0.6384

d.0.5216 to 0.6584

46) Xiamen University decide to conduct a survey of students cheating on their online exam andassignment. In the survey of 200 students, 58% of the students cheat on an online exam, 50% cheat onassignment. the sampling error of a 95% confidence interval estimate of the population proportion of students who cheat on the online exam is ________.

Select one:

a.0.0684

b.0.0784

c.0.0984

d.0.0884

47) Xiamen University decide to conduct a survey of students cheating on their online exam andassignment. In the survey of 200 students, 58% of the students cheat on an online exam, 50% cheat onassignment. Construct a 90% confidence interval estimate of the population proportion of students who cheat onassignment.

Select one:

a.0.4518 to 0.5682

b.0.4418 to 0.5582

c.0.4307 to 0.5693

d.0.5418 to 0.6582

48) Xiamen University decide to conduct a survey of students cheating on their online exam andassignment. In the survey of 200 students, 58% of the students cheat on an online exam, 50% cheat onassignment. Determine the sample size needed to estimate the proportion of students who cheat onassignmentto within +0.02 and -0.02 with 95% confidence.

Select one:

a.2301

b.2401

c.2501

d.2410

49) You use 20 observations and two independent variables and find R squared=0.800, what would be your adjusted R squared

Select one:

a.0.796

b.0.766

c.0.800

d.0.776

50) Assume =10; =40; ()()=450; ()2=150. What would be the estimated regression equation?

Select one:

a.=3+70

b.=703

c.=4010

d.=45010