Statistics Quiz 6

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Statistics Quiz 6

1 / 50

Second moment about mean is_______________?

2 / 50

The Coefficient of Skewness is always zero for ____________ distribution?

3 / 50

Variance of binomial distribution is always:______________?

4 / 50

Which branch of statistics deals with the techniques that are used to organize, summarize, and present the data?

5 / 50

Standard deviation of the sampling distribution of a statistics is called_____________?

6 / 50

The probability of drawing an even number in a toss of a balanced die ______________?

7 / 50

The Mann-Whitney U test is preferred to a t-test when____________?

8 / 50

Total Area under the curve in probability of density function is ?

9 / 50

The lower class boundary of 25-35 will be ______________?

10 / 50

The formula ?poqn/?poqo x100 is used to calculate_______________?

11 / 50

If a and b are two constants, then Var(a+bX) is_______________?

12 / 50

95% confidence limits for P are _________________?

13 / 50

In r x c table for test of Independence the degree of freedom is _____________?

14 / 50

The mean, median and mode for binomial distribution will be equal when:______________?

15 / 50

if f(x1,x2,?xn;?)=g(??;?)h(x1,x2,?.,xn), then ?? is____________?

16 / 50

If we increase the sample size, it means that it:_________________?

17 / 50

The probability of a save event is equal to _________________?

18 / 50

________ is the simplest means of dispersion?

19 / 50

A random variable X has binomial distribution with n = 10 and p = 0.3 then variance of X is:_____________________?

20 / 50

The difference between statistics and parameter is called:______________?

21 / 50

The mode of the data 2,4,6,6,6,8 is _______________?

22 / 50

Mean deviation of Normal Distribution is_____________?

23 / 50

If a Binomial experiment is repeated ?N? times then binomial frequency distribution is. _______________?

24 / 50

H.M. _____ G.M. _______ A.M?

25 / 50

Attributes are _______ if they have some relation?

26 / 50

The mean of hypergeometric distribution is:___________________?

27 / 50

data classified by methods are called __________ data?

28 / 50

Probability distribution of a statistics is called_________________?

29 / 50

If the standard deviation of the values 2, 4, 6, 8 is 2.58, then the standard deviation of the values 4, 6, 8, 10 is_______________?

30 / 50

Average calculated used in index number by __________ method?

31 / 50

If X N(55,49) then ? ?

32 / 50

what is the probability of a type II error when ?=0.05 ?

33 / 50

If X ? N (?, ?2) then Z ?__________?

34 / 50

According to the empirical rule, approximately what percent of the data should lie within ????

35 / 50

The Index number are used to measure seasonal and cyclical variations in ____________?

36 / 50

Binomial distribution has parameters:______________?

37 / 50

P95 means _____?

38 / 50

If X and Y are independent then SD (X ? Y) is________________?

39 / 50

Sampling errors are reduced by:___________________?

40 / 50

Which of the following is not an example of a discrete probability distribution ?

41 / 50

Richness is not a ________________?

42 / 50

The weighty system changed with _______________?

43 / 50

The S.D. and variance are ____ of origine?

44 / 50

The minimum variance unbiased estimator of the population mean is _______________?

45 / 50

Criteria to check a point estimator to be good are_____________?

46 / 50

If ?X? is normally distribution with >?= 8 and S.? D. 4, then P(6?X?10) may be______________?

47 / 50

Variance remains unchanged by change of_____________?

48 / 50

The relation showing between whole and its components used chart is said to be ___________________?

49 / 50

Statistics laws are true for______________?

50 / 50

The standardized normal variate z means_________ away from the mean?

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