Statistics Quiz 12
1 / 50
In a binomial distribution, n = 20 and p = 3/5, then variance of this distribution ______________?
2 / 50
In a standard normal distribution z = 0 corresponds to _____________?
3 / 50
f1x12 + f2x22 + ?????+ fxx42=___________?
4 / 50
Normal distribution is a probability distribution of _____ random variable?
5 / 50
Two attributes are associated if expected frequency is ____________________?
6 / 50
Coefficient of variation (C.V) is given below:_________________?
7 / 50
The mean of 5,5,5,5,5 is ______?
8 / 50
Which of the following test must be two-sided ?
9 / 50
Wilcoxon Rank-Sum test can be of_______________?
10 / 50
If the standard deviation of the values 2,4,6,8 is 2.33, then the standard deviation of the values 4,6,8,10 is_____________?
11 / 50
Random samples of size 17 are from a population that has 200 elements, a mean of 36, and a standard deviation of 8. which of the following best describes the from of the sampling distribution of the sample mean for this situation ?
12 / 50
if we connect the mid point of rectangles in a histogram with a series of lines, we get __________
13 / 50
If any value in the data is zero, then which of the following average vanishes_________?
14 / 50
Which of the following is simple hypothesis___________________?
15 / 50
If bxy = byx = r then ________________?
16 / 50
Mean deviation is always ________________?
17 / 50
A characteristics that does not change is called______________?
18 / 50
In normal distribution u2 = S2 and u4 =___________?
19 / 50
The class ___ are obtained when we divide the sums of the lower and upper class limits by 2?
20 / 50
A parameter is a measure which is computed from___________?
21 / 50
__________ deviation taken from A.M. is always equal to zero?
22 / 50
The degree of peakedness is called__________________?
23 / 50
Dependence of difference on statistics is for_______________?
24 / 50
G.M. are set of ?n? values product of the nth roots of the ______________?
25 / 50
Coded method of calculation is only used in ___________?
26 / 50
In a Poisson probability distribution __________________?
27 / 50
Since E(X) _______X is said to be unbiased estimator of the population mean?
28 / 50
Which of the following test is most likely assessing this null hypothesis: Ho The number of violations per apartment in the population of all city apartments is binomially distributed with a probability of success in any one trial of P=0.3 dd ?
29 / 50
Type II error is committed when the null hypothesis is _________________?
30 / 50
In testing for the difference between two populations, it is possible to use____________?
31 / 50
Qon means _________ for the given year?
32 / 50
Power of test is denoted by _______________?
33 / 50
The lack of uniformity is called ______________?
34 / 50
condition for applying Central Limit Theorem (CLT) which approximate the sampling distribution of the mean with a normal distribution is ?
35 / 50
The mean of a distribution is 14 and the standard deviation is 5. What is the value of the coefficient of variation ?
36 / 50
Which of the following is not a correct statement about a Probability _________________?
37 / 50
The sum of p and q is always:___________________?
38 / 50
For a normal distribution having ? = 241 and ? = 2 P (X?235) is:_______?
39 / 50
The most repeated (popular) value in a data set is called___________?
40 / 50
Given X1=12,X2=19,X3=10,X4=7, then summation of X equals?
41 / 50
Binomial distribution is positively skewed when ______________?
42 / 50
An estimator Q is an unbiased estimator of the population parameter Q if ___________________?
43 / 50
The probability of getting exactly two heads when two balanced coins are toss once_________________?
44 / 50
The sum of deviations of observations is zero, when deviations are taken from __________?
45 / 50
If r, between u = x and y = -x is _______________?
46 / 50
The smallest and the largest value of any given class of a frequency distribution are called ___________?
47 / 50
In binomial experiment, the successive trials are _____________?
48 / 50
The second moment about mean is _____?
49 / 50
An index number is used______________?
50 / 50
We use normal distribution when ?n? is________________?
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