Central Tendency

Q. When $10$ is subtracted from all the observations, the mean is reduced to $60\text{\%}$ of its value. If $5$ is added to all the observations, then the mean will be

Q.

When the origin is changed, then the coefficient of correlation

1. becomes zero

2. varies

3. remains fixed

4. None of these

Q. For a given data set, mean, mode and median are all equal.

1. True
2. False

Q.

Median of Mode, Mean, Median of data 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5 is

1. 4

2. 4.6

3. 5

4. 11/3

Q. Which of the following are the measure of central tendency

1. Mean
2. Median
3. Mode
4. All of the above

Q.

What is the use of the best fit line?

Q.

How do you know statistical significance?

Q. Which of the following are the measure of central tendency

1. Mean
2. Median
3. Mode
4. All of the above

Q. When $10$ is subtracted from all the observations, the mean is reduced to $60\%$ of its value. If $5$ is added to all the observations, then the mean will be

Q.

Mean of a given Data set is

1. Number of given observations

2. Most recovery observation

3. 

4. 

Q. The mean of $n$ items is $\overline{x}$. If each item is successively increased by $5,5^2,5^3.........,5^n,$ then new mean equals to

1. $\overline{x}+\frac{5(5^n-1)}{2n}$
2. $\overline{x}+\frac{5^{n+1}}{n}$
3. $\overline{x}+\frac{5(5^n-1)}{4n}$
4. $\overline{x}+\frac{(5^n-1)}{8n}$

Q. When $10$ is subtracted from all the observations, the mean is reduced to $60\%$ of its value. If $5$ is added to all the observations, then the mean will be

Q. For a given data set, mean, mode and median are all equal.

1. True
2. False

Q. The set {7, 7, 7, 7, 7} has the same Mean, Median, and Mode.

1. False
2. True

Q. The set {7, 7, 7, 7, 7} has the same Mean, Median, and Mode.

1. False
2. True

Q. If in a binomial distribution mean is 5 and variance is 4, write the number of trials.