Statistics Test...

The mean of 12, 10, p, p + 2 and 11 is 9. What is the value of p?

What is the mean of all prime numbers between 50 and 80 rounded to the nearest whole number?

The given data shows the runs scored by Rahul Dravid in the first ten one day matches of his career.

110	82	94	181	186
81	78	93	127	78

The range of the data is ______.

Class Interval	Frequency
0 - 10	a
10 - 20	b
20 - 30	c
30 - 40	d
40 - 50	f
50 - 60	d
60 - 70	h
70 - 80	i
80 - 90	j
90 - 100	k

If 'f' is the highest frequency of the given data, then which of the following values is nearest to the mode?

In an experiment, 9 readings were to be taken. 8 of the readings are as follows:

106, 108, 102, 109, 198, 100, 107, 104

Which of the following can be the 9^th reading if the median is 106?

The mean, median and mode for the following set of data are equal.

{-30, -40, -80, -50, a}

Which of the following is a possible value of a?

The sum of the deviations of a set of values x₁, x₂, ………..x_n measured from 50 is -10, and the sum of deviations of the values from 46 is 70. The mean is

The median of set of 9 distinct observations is 20.5. If each of the largest 4 observations of the set is increased by 2, then the median of the new set

What is the correct relation in the given data?

2, 3, 0, -1, 1, 5, 6, 4, 5, 8, 11

The average of five consecutive natural numbers is 11. Which is the third largest number out of these five numbers?

If the mean of r₁, r₂, r₃ and r₄ is m, what is the mean of r₁ – t, r₂ – t, r₃ – t and r₄ – t?

What is the mode of the following data of the blood pressure levels of patients (mg/dL) in a month?

105, 90, 117, 218, 250, 293, 350, 120, 258, 120, 255, 210, 196, 185, 175, 177, 177, 123, 158, 125, 105, 70, 75, 83, 135, 120

In a set of 991 consecutive natural numbers, if we increase the first 300 numbers by 3 each and decrease the last 300 numbers by 3 each, what will be the effect on the median?

For the numbers 11, 15, 9, 14, 12, 15 and 18, which of the following is true?

What is the value of assumed mean of the given data, if mean of the data is 16?

fi	di
4	-15
5	-10
7	-5
12	0
7	5
5	10

The following table shows the weights (in lbs, rounded off to the nearest integral value) of newborns in a city hospital on the 4^th of July.

3	6	6	7	7
7	8	8	8	8
9	9	9	10	10

The outlier measurement of 3 lbs is that of a premature delivery and should be ignored for all statistical studies. Of the mean, median, and range of the values listed, which will change the least if the 3 lbs measurement is removed from the data?

A book store has a total stock of 25 books of grades 4, 5, 6 and 7. The table below shows the number of books of each grade. Find the number of books of grade 4.

Grade	4	5	6	7
Frequency	?	6	9	6

The average age of 8 persons in a committee is increased by 2 years, when two men aged 35 years and 45 years are substituted by two women. Find the average age of these two women.

The average temperature of Tuesday, Wednesday and Thursday was 42°C. The average temperature of Wednesday, Thursday and Friday was 47°C. If the temperature on Tuesday was 43°C, then the temperature on Friday was

The average height of 30 boys out of a class of 50 is 160 cm. If the average height of the remaining boys is 165 cm, the average height of the whole class (in cm) is

What is the average number of consumers who like Whirlpool over the first five years?

What is the ratio of average number of consumers who like LG to average number of consumers who like Samsung over the first three years?

State 'T' for true and 'F' for false for the following statements.

(i) The class mark of a class interval can be found by dividing the difference between the upper and lower limits of class by 2.
(ii) The mean of the first 10 prime numbers is 12.9.
(iii) Bar graphs are used for continuous class intervals.
(iv) The stored information or data which is already collected from a source is called raw data.

Fill in the blanks with the help of the given table.

(i) The P of a data set is not affected by the extreme values.
(ii) The mean of two middle terms gives the median when the number of observations is Q .
(iii) The difference between the upper class limit and the lower class limit is known as R .
(iv) Mid-value of a class interval is called its S .

	P	Q	R	S
A	mean	odd	class mark	class size
B	mode	even	class size	class size
C	mode	even	class width	class mark
D	median	odd	class mark	class width

Match the following:

Column A	Column B
(i) The average age of five teachers is 28 years. If one teacher is excluded, then the mean gets reduced by 2 years. The age of the excluded teacher (in years) is	(A) 25
(ii) The data set for ages of 9 employees of a company is: 32, 35, 32, 37, 39, 38, 38, 32, 34. The mode of the given observations is	(B) 32
(iii) The median of 10, 20, 15, 30, 35 and 42 is	(C) 6
(iv) If the median of 2, m, m + 2, and 10 arranged in ascending order is 7 , the value of 'm' is	(D) 36