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5Points Quiz

Before applying a statistics in a research, which of the following statement is incorrect in what a researcher needs to know?

        A.   Statistical significance test for comparing one set of data with another

        B.   What technique to use for an investigation

        C.  Un-clarification of what to be achieved

        D.   Rules of using the technique, using correctly the statistical techniques for analysis of biological data

Answer: C

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Ten percent of the tools produced in a certain manufacturing process turn out to be defective. Find the probability that in a sample of 10 tools chosen at random exactly 2 will be defective by using poisson approximation to binomial distribution

        A.   0.74

        B.   0.580

        C.  0.62

        D.   0.18

Answer: D

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Weight measurement is conducted on new harvest of Watermelon, Thirty (n=30) randomly selected watermelon are carefully weigh and the weight recorded, the mean weight of the sample is 28.6g and the sample standard deviation is 2.2g. Estimate a 95% confidence interval for the mean weight in the whole watermelon harvest

        A.   (25.72, 31.24)

        B.   (21.34, 28.41)

        C.  (27.81, 29.39)

        D.   (25.61, 29.12)

Answer: C

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The seven pairs of values (x, y) below shows the number of absences, x, in a BIO206 tutorial at Abuja study centre and the final exam grade, y, for 7 students. Find the equation of regression between x and y (1, 95), (0 , 90), (2,90), (6 ,55 ), (4, 70), (3 ,80), (3,85)

        A.   y = 3.56x - 9.57

        B.   y = -7.12x+12.38

        C.   y = -2.55x - 6.23

        D.   y = -6.55x+98.49

Answer: D

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The seven pairs of values (x, y) below shows the number of absences, x, in a BIO206 tutorial at Abuja study centre and the final exam grade, y, for 7 students. Find the correlation coefficient between x and y (1, 95), (0 , 90), (2,90), (6 ,55 ), (4, 70), (3 ,80), (3,85)

        A.   r = 0.82

        B.   r = -0.93

        C.   r = -0.56

        D.   r = 0.75

Answer: B

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In a poultry farming, the daily demand for water is normally distributed with a mean of 4000 litres and a standard deviation of 400 litres, if z-score of demand for a given day is 1.3. how many litres of water is the demand for the day?

        A.   3650 litres

        B.   6650 litres

        C.   4520 litres

        D.   5540 litres

Answer: C

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How to login to NOUN Elearn Portal

  • Admin
  • 25 Feb, 2022 12:12:45

You can now use you matric number to login as your username and  password in a lowercase.

https://elearn.nouedu2.net/login/

Note that you are to change your passw...

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