Question

1)

Which type of error is more likely to be made if it is difficult to perform sampling and there is high population variance?

Select one:

a. Type I error

b. Type II error

c. Type III error

d. a and b, but not c

e. a, b and c

2)

Pearson's r is suitable to measure the linear relationship between two __________ level variables.

Select one:

a. interval/ratio

b. ratio but not interval

c. interval but not ratio

d. interval, ratio or nominal

3)

A Type I error occurs when __________ and its probability of occuring is __________.

Select one:

a. we reject a true null hypothesis / 1 - alpha

b. we reject a true null hypothesis / alpha

c. we fail to reject a false null hypothesis / alpha

d. we fail to reject a false null hypothesis / 1 - alpha

4)

A normal distribution has a mean of 50 and a standard deviation of 12. 68% of the distribution can be found between what two numbers?

Select one:

a. 44 and 56

b. 38 and 62

c. 16 and 86

d. 42 and 58

5)

A research question tells us __________, while a hypothesis includes __________.

Select one:

a. the dependent variable and the independent variable / the dependent variable only

b. the independent variable only / the dependent variable and the independent variable

c. the dependent variable and the independent variable / the independent variable only

d. the dependent variable only / the dependent variable and the independent variable

Answer 1

3)

Type 1 error means rejection of true null hypothesis

Type 2 error means failure to reject false null hypothesis

And type 1 error is our alpha

So correct answer is option b

4)

According to the emperical rule

If the data is normally distributed

Then 68% lies in between mean - s.d and mean + s.d

95% lies in between mean - 2*s.d and mean + 2*s.d

99.7% lies in between mean - 3*s.d and mean + 3*s.d

So,68% lies in between

50 - 12. And 50+12

38 and 62