# Statistics Quiz 12

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Statistics Quiz 12

1 / 50

We use normal distribution when ?n? is________________?

2 / 50

If bxy = byx = r then ________________?

3 / 50

Mean deviation is always ________________?

4 / 50

The smallest and the largest value of any given class of a frequency distribution are called ___________?

5 / 50

The sum of p and q is always:___________________?

6 / 50

In normal distribution u2 = S2 and u4 =___________?

7 / 50

If r, between u = x and y = -x is _______________?

8 / 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 ?

9 / 50

if we connect the mid point of rectangles in a histogram with a series of lines, we get __________

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

__________ deviation taken from A.M. is always equal to zero?

12 / 50

Coded method of calculation is only used in ___________?

13 / 50

In testing for the difference between two populations, it is possible to use____________?

14 / 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 ?

15 / 50

Two attributes are associated if expected frequency is ____________________?

16 / 50

If any value in the data is zero, then which of the following average vanishes_________?

17 / 50

Coefficient of variation (C.V) is given below:_________________?

18 / 50

The most repeated (popular) value in a data set is called___________?

19 / 50

Since E(X) _______X is said to be unbiased estimator of the population mean?

20 / 50

The sum of deviations of observations is zero, when deviations are taken from __________?

21 / 50

Wilcoxon Rank-Sum test can be of_______________?

22 / 50

An estimator Q is an unbiased estimator of the population parameter Q if ___________________?

23 / 50

Power of test is denoted by _______________?

24 / 50

The mean of 5,5,5,5,5 is ______?

25 / 50

f1x12 + f2x22 + ?????+ fxx42=___________?

26 / 50

In binomial experiment, the successive trials are _____________?

27 / 50

Type II error is committed when the null hypothesis is _________________?

28 / 50

A characteristics that does not change is called______________?

29 / 50

In a binomial distribution, n = 20 and p = 3/5, then variance of this distribution ______________?

30 / 50

In a Poisson probability distribution __________________?

31 / 50

An index number is used______________?

32 / 50

Which of the following test must be two-sided ?

33 / 50

Given X1=12,X2=19,X3=10,X4=7, then summation of X equals?

34 / 50

condition for applying Central Limit Theorem (CLT) which approximate the sampling distribution of the mean with a normal distribution is ?

35 / 50

Binomial distribution is positively skewed when ______________?

36 / 50

The class ___ are obtained when we divide the sums of the lower and upper class limits by 2?

37 / 50

The lack of uniformity is called ______________?

38 / 50

Which of the following is simple hypothesis___________________?

39 / 50

Normal distribution is a probability distribution of _____ random variable?

40 / 50

A parameter is a measure which is computed from___________?

41 / 50

The probability of getting exactly two heads when two balanced coins are toss once_________________?

42 / 50

The degree of peakedness is called__________________?

43 / 50

For a normal distribution having ? = 241 and ? = 2 P (X?235) is:_______?

44 / 50

The mean of a distribution is 14 and the standard deviation is 5. What is the value of the coefficient of variation ?

45 / 50

The second moment about mean is _____?

46 / 50

Qon means _________ for the given year?

47 / 50

In a standard normal distribution z = 0 corresponds to _____________?

48 / 50

Which of the following is not a correct statement about a Probability _________________?

49 / 50

Dependence of difference on statistics is for_______________?

50 / 50

G.M. are set of ?n? values product of the nth roots of the ______________?

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