Jaiib solved numerical 8279470702
1) In a normal distribution 95.5% of all the sample statistics are within ------ standard errors of the population parameter.
A) ± 5%
B) ± 2.25%
C) ± 3%
D) None of these
Ans: B
2) Out of following, which 3 measures are used in correlation analysis?
a) standard error
b) covariance
c) standard deviation
d) coefficient of correlation
e) coefficient of determination
A) a, b, c
B) a, c, e
C) b, d, e
D) b, c, e
Ans: C
3) The correlation coefficient for ten pairs of x- and y- values, with x ranging from Rs.500 to Rs.700, is calculated to be 0.79, and the regression equation is y = 620 + 4.3x. Which of the following is TRUE?
A) When x = Rs.600, the estimate of y = 3,200
B) When x = Rs.500, the estimate of y from the regression equation is likely to be reliable
C) When x = 0, the estimate of y from the regression equation is likely to be reliable
D) When x increases by Rs.1, y increases by 0.79.
Ans: A
Q.19) For a data of 8 half year periods the code for the 7th half is;
A) 2
B) 3
C) 6
D) 5
Ans: D
4) In statistics, there are –––––– type/s of estimates:
A) One
B) Two
C) Three
D) Four
Ans: B
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