Statistics Quiz 6
1 / 50
Sampling errors are reduced by:___________________?
2 / 50
If X ? N (?, ?2) then Z ?__________?
3 / 50
________ is the simplest means of dispersion?
4 / 50
what is the probability of a type II error when ?=0.05 ?
5 / 50
The Coefficient of Skewness is always zero for ____________ distribution?
6 / 50
Attributes are _______ if they have some relation?
7 / 50
data classified by methods are called __________ data?
8 / 50
Average calculated used in index number by __________ method?
9 / 50
In r x c table for test of Independence the degree of freedom is _____________?
10 / 50
Which branch of statistics deals with the techniques that are used to organize, summarize, and present the data?
11 / 50
The difference between statistics and parameter is called:______________?
12 / 50
If a and b are two constants, then Var(a+bX) is_______________?
13 / 50
Variance remains unchanged by change of_____________?
14 / 50
Mean deviation of Normal Distribution is_____________?
15 / 50
The formula ?poqn/?poqo x100 is used to calculate_______________?
16 / 50
If a Binomial experiment is repeated ?N? times then binomial frequency distribution is. _______________?
17 / 50
If X N(55,49) then ? ?
18 / 50
If ?X? is normally distribution with >?= 8 and S.? D. 4, then P(6?X?10) may be______________?
19 / 50
The lower class boundary of 25-35 will be ______________?
20 / 50
If we increase the sample size, it means that it:_________________?
21 / 50
P95 means _____?
22 / 50
Criteria to check a point estimator to be good are_____________?
23 / 50
The standardized normal variate z means_________ away from the mean?
24 / 50
The mean of hypergeometric distribution is:___________________?
25 / 50
Which of the following is not an example of a discrete probability distribution ?
26 / 50
if f(x1,x2,?xn;?)=g(??;?)h(x1,x2,?.,xn), then ?? is____________?
27 / 50
Total Area under the curve in probability of density function is ?
28 / 50
The relation showing between whole and its components used chart is said to be ___________________?
29 / 50
95% confidence limits for P are _________________?
30 / 50
Statistics laws are true for______________?
31 / 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_______________?
32 / 50
H.M. _____ G.M. _______ A.M?
33 / 50
The probability of drawing an even number in a toss of a balanced die ______________?
34 / 50
Binomial distribution has parameters:______________?
35 / 50
Variance of binomial distribution is always:______________?
36 / 50
Second moment about mean is_______________?
37 / 50
The minimum variance unbiased estimator of the population mean is _______________?
38 / 50
Richness is not a ________________?
39 / 50
The probability of a save event is equal to _________________?
40 / 50
The weighty system changed with _______________?
41 / 50
A random variable X has binomial distribution with n = 10 and p = 0.3 then variance of X is:_____________________?
42 / 50
Probability distribution of a statistics is called_________________?
43 / 50
The S.D. and variance are ____ of origine?
44 / 50
The mode of the data 2,4,6,6,6,8 is _______________?
45 / 50
The Index number are used to measure seasonal and cyclical variations in ____________?
46 / 50
If X and Y are independent then SD (X ? Y) is________________?
47 / 50
The mean, median and mode for binomial distribution will be equal when:______________?
48 / 50
Standard deviation of the sampling distribution of a statistics is called_____________?
49 / 50
According to the empirical rule, approximately what percent of the data should lie within ????
50 / 50
The Mann-Whitney U test is preferred to a t-test when____________?
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