Statistics Test

Result

Statistics Test - 38

Score
-
out of -
Rank
-
out of -

TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

A

B

C

D
None of these

Solution
Question 2
4 / -1

A

B

C

D

Solution
Question 3
4 / -1

Mean of 100 observations in 45. It was later found that two observations 19 and 31 were incorrectly recorded as 91 and 13. The correct mean is

A
44.0

B
44.46

C
45.00

D
45.54

Solution
Question 4
4 / -1

A

B

C

D

Solution
Question 5
4 / -1

A
154

B
155

C
160

D
161

Solution
Question 6
4 / -1

A
90°

B
28°

C
150°

D
144°

Solution
Question 7
4 / -1

The mean and S.D. of the marks of 200 candidates were found to be 40 and 15 respectively. Later, it was discovered that a score of 40 was wrongly read as 50. The correct mean and S.D. respectively are

A
14.98, 39.95

B
39.95, 14.98

C
39.95, 224.5

D
None of these

Solution
Question 8
4 / -1

A

B

C

D
None of these

Solution
Question 9
4 / -1

In a series of 2n observations, half of them equal to a and remaining half equal to –a. If the standard deviation of the observations is 2, then |a| equals

A

B

C
2

D

Solution
Question 10
4 / -1

A

B

C

D
None of these

Solution