Deck 4: Hypothesis Testing and Statistical Errors

Question 1

Power of a test is related to ........................

A)Type I error
B)Type II error
C)Both a and b
D)None of these

Answer 1

Type II error

Question 2

Level of significance is the probability of................................

A)Type I error
B)Type II error
C)Both a and b
D)None of these

Answer 2

Type I error

Question 3

Which type of error is more severe error:

A)Type I error
B)Type II error
C)Both a and b
D)None of these

Answer 3

Type II error

Question 4

Type I error is denoted by...........................

A)Alpha
B)Beta
C)Gamma
D)None of these

Question 5

Type II error is denoted by....................................

A)Alpha
B)Beta
C)Gamma
D)None of these

Question 6

The level of probability of accepting a true null hypothesis is called........................

A)Degree of freedom
B)Level of significance
C)Level of confidence
D)D,

Question 7

The probability of rejecting a true null hypothesis is called.......................

A)Degree of freedom
B)Level of significance
C)Level of confidence
D)None of these

Question 8

1 - Level of confidence =.............................

A)Level of significance
B)Degree of freedom
C)Either a or b
D)None of these

Question 9

While testing a hypothesis, if level of significance is not mentioned, we take ................... level of significance.

A)1%
B)2%
C)5%
D)10%

Question 10

...............refers to the number of independent observations which is obtained by subtracting the number of constraints from the total number of observations.

A)Sample size
B)Degree of freedom
C)Level of significance
D)Level of confidence

Question 11

Total number of observations - number of constraints =......................

A)Level of significance
B)Degree of freedom
C)Level of confidence
D)Sample size

Question 12

Accepting a null hypothesis when it is true is called................................

A)Type I error
B)Type II error
C)Probable error
D)No error

Question 13

When sample is small,....................... test is applied.

A)t-test
B)Z test
C)F test
D)None of these

Question 14

To test a hypothesis about proportions of items in a class, the usual test is..............

A)t-test
B)Z- test
C)F test
D)Sign test

Question 15

Student's t-test is applicable when:

A)The values of the variate are independent
B)The variable is distributed normally
C)The sample is small
D)All the above

Question 16

Testing of hypotheses Ho : ? = 45 vs. H1 : ? > 45 when the population standard deviation is known, the appropriate test is:

A)t-test
B)Z test
C)Chi-square test
D)F test

Question 17

Testing of hypotheses Ho : ? = 85 vs. H1 : ? > 85, is a ...................test.

A)One sided left tailed test
B)One sided right tailed test
C)Two tailed test
D)None of these

Question 18

Testing of hypotheses Ho : ? = 65 vs. H1 : ? < 65, is a ...................test.

A)One sided left tailed test
B)One sided right tailed test
C)Two tailed test
D)None of these

Question 19

Testing of hypotheses Ho : ? = 65 vs. H1 : ? ? 65, is a ...................test.

A)One sided left tailed test
B)One sided right tailed test
C)Two tailed test
D)None of these

Question 20

Student's t-test was designed by ............................

A)R A Fisher
B)Wilcoxon
C)Wald wolfowitz
D)W S Gosset

Question 21

Z test was designed by ........................................

A)R A Fisher
B)Wilcoxon
C)Wald wolfowitz
D)W S Gosset

Question 22

Z test was designed by .......................................

A)R A Fisher
B)Wilcoxon
C)Wald wolfowitz
D)W S Gosset

Question 23

The range of F ratio is ........................................

A)- 1 to + 1
B)- ? to ?
C)0 to ?
D)0 to 1