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# December: Statistics

Welcome to the December 2021 PositiveNaija Science Quiz!

Date: 26th December, 2021 | Time: 9:00 pm - 9:05 pm

The 15 Questions will be updated on this same post at the stated date and time with replies (answers) by participants to follow accordingly.

Thank you.

• Rescheduled: The December edition is rescheduled for December 4 (9:00 AM - 9:05 AM).
1. When the Mean of a number is 18, what is the Mean of the sampling distribution?
1. 21
2. 18
3. 27
4. 23

1. If the probability of hitting an object is 0.8, find the variance
1. 18
2. 16
3. 14
4. 12

1. E(X) = λ is used for which distribution?
1. Binomial distribution
2. Poisson's distribution
3. Bernoulli's distribution
4. Laplace distribution

1. Find the arithmetic mean of the set of data: 6,1,5,8, and 10
1. 4
2. 5
3. 6
4. 7

1. Calculate the geometric mean of 1,3,9,3
1. 1
2. 2
3. 3
4. 4

1. Find the variance of the given data set: 3,9,5,6,7
1. 1
2. 2
3. 3
4. 4

1. The Poisson distribution is applied for
1. Regular Random Variable
2. Constant time function
3. Discrete Random Variable
4. Irregular Random Variable

1. If the Critical region is evenly distributed then the test is referred as?
1. Two tailed
2. One tailed
3. Three tailed
4. Zero tailed

1. The probability that person A completes all the tasks assigned is 50% and that of person B is 20%. Find the probability that all the tasks are completed.
1. 15
2. 25
3. 35
4. 45

1. In Nigeria, there are 55 members of the National Statistics Association. Every member posts a greeting card to all the members. How many greeting cards were posted by them?
1. 990
2. 890
3. 1980
4. None of the above

1. E(X) = npq is for which distribution?
1. Bernoulli’s
2. Binomial
3. Poisson’s
4. Normal

1. Which of these distributions is used for a testing hypothesis?
1. Normal Distribution
2. Chi-Squared Distribution
3. Gamma Distribution
4. Poisson Distribution

1. Weibull distribution gives the failure rate proportional to the power of time.
1. True
2. False

1. In Standard normal distribution, the value of mode is
1. 2
2. 1
3. 0
4. None of the above

1. In a hypothesis test, what does the p value signify?
1. smallest level of significance for rejection of Null Hypothesis
2. largest level of significance for rejection of Null Hypothesis
3. smallest level of significance for acceptance of Null Hypothesis
4. smallest level of significance for acceptance of Null Hypothesis

Sincere apologies for the delay. Time will be compensated for; meaning that all answers submitted from 9:08:07 AM will not be accepted.

Thank you.

1. B

2. D

3. C

4. C

5. C

6. D

7. A

8. A

9. C

10. B

11. C

12. B

13. B

14. B

15. C

1 A

2 D

3 B

4 C

5 D

6 C

7 C

8 B

9 C

10 D

11 C

12 B

13 B

14 B

15 A

1. B

2.B

3.B

4.C

5.C

6.D

7.C

8.A

9.A

10.D

11.A

12.A

13.A

14.C

15.A

1. B
2. C
3. B
4. C
5. A
6. B
7. B
8. A
9. C
10. B
11. B
12. A
13. A
14. D
15. A

1.B

2 B

3C

4C

5C

6D

7C

8D

9C

11.C

12 B

13B

14C

15A

10D

1. A

2. A

3. B

4. C

5. A

6. D

7. A

8. A

9. A

10. D

11. B

12. A

13. A

14. C

15. C

1a

2a

3b

4c

5a

6d

7c

8a

9c

10d

11b

12a

13c

14d

15c

1, D

2, C

3, B

4, C

5, A

1. B, 2. B, 3.B, 4. C, 5. D, 6. C , 7. D, 8. A, 9.C, 10.D, 11.B, 12.A, 13.A 14.D, 15. B

The winners for this edition are as follows:

1. 1st - Emmanuel Adebajo: 13/15
2. 2nd - Ayodeji Olowolagba: 9/15
3. 3rd - Owosina Samuel Kayode: 6/15 in 9:05:52 AM ahead of Oyinlola Abosede (16/15 in 9:06:30 AM)

Congratulations and thanks to everyone.

Answers to the quiz questions can be accessed here: https://www.positivenaija.com/2021-positivenaija-science-quiz/

Prize received. Thank you so much

Prize well received. Thank you so much Positivenaija

Quote from Ayodeji Olowolagba on December 4, 2021, 12:50:50 PM

Prize received. Thank you so much

Quote from Adebajo Emmanuel on December 4, 2021, 12:52:23 PM