Question 1 :
The mean salary paid per week to $1000$ employees of an establishment was found to be Rs. $900$. Later on, it was discovered that the salaries of two employees were wrongly recorded as Rs. $750$ and Rs. $365$ instead of Rs. $570$ and Rs. $635$. Find the corrected mean salary.

Question 2 :
Which ideal measure of central tendency used to find the middle value, if the data are categorical?<br>

Question 4 :
The median class of the frequency distribution given below is _______.<br><table class="wysiwyg-table"><tbody><tr><td>Class</td><td>0 - 10</td><td>10 - 20</td><td>20 - 30</td><td>30 - 40</td><td>40 - 50</td></tr><tr><td>Frequency</td><td>7</td><td>15</td><td>13</td><td>17</td><td>10</td></tr></tbody></table>

Question 6 :
The average value of the median of $2,8,3,7,4,6,7$ and the mode of $2,9,3,4,9,6,9$ is

Question 7 :
If in &#160;a moderately asymmetrical distribution mean and mode are &#160;$9a, 6a $ respectively then median is equals,

Question 8 :
The median of the observation $11, 12, 14, 18, x + 2, x + 4, 30, 32, 35$ and $41$ is $24$. Find '$x$'.

Question 9 :
If in a moderately skewed distribution the values of modeand mean are $6$ $\lambda$ and $9$ $\lambda$ respectively, then value of median is ...

Question 10 :
If the ratio of mode and median of a distribution is $6:5$, then the ratio of its mean and median is

Question 11 :
The median and mode of a frequency distribution are $525$ and $500$ then mean of same frequency distribution is

Question 12 :
If the mean of x and 1/x is Mthen the mean of$\displaystyle x^{2}$ and$\displaystyle 1/x^{2}$ is

Question 13 :
The following table shows ages of 300 patients getting medical treatment in a hospital on a particular day.<br>Find the median age of patients<br><table class="wysiwyg-table"><tbody><tr><td>Age (in years)</td><td>10 - 20</td><td>20 - 30</td><td>30 - 40</td><td>40 - 50</td><td>50 - 60</td><td>60 - 70</td></tr><tr><td>No. of Patients</td><td>60</td><td>42</td><td>55</td><td>70</td><td>53</td><td>20</td></tr></tbody></table>

Question 14 :
Find the mean of the following data: Range of first $n$ natural numbers range of negative integers from $-n$ to $-1$ (where $-n &lt; - 1$), range of first $n$ positive even&#160;integers and range of first $n$ positive odd integers

Question 15 :
The following frequency distribution isclassified according to the number of mangoes in different branches. Calculatethe median of the mangoes in each branch<br><table class="wysiwyg-table"><tbody><tr><td>Number of Mangoes</td><td>$0-10$</td><td>$10-20$</td><td>$20-30$</td><td>$30-40$</td><td>$40-50$</td><td>$50-60$</td><td>$60-70$</td></tr><tr><td>Branch</td><td>$5$</td><td>$4$</td><td>$6$</td><td>$2$</td><td>$4$</td><td>$3$</td><td>$1$</td></tr></tbody></table>

Question 17 :
Median of a data set is a number which has an equal number of observation below and above it. The median of the data 1, 9, 4, 3, 7, 6, 8, 8, 12, 15 is

Question 19 :
If the median of the following frequency distribution is $32.5$, find the missing frequencies.<br/><table class="wysiwyg-table"><tbody><tr><td>Class interval<br/></td><td>Frequency<br/></td></tr><tr><td>0-10<br/></td><td>$f_1$<br/></td></tr><tr><td>10-20<br/></td><td>5<br/></td></tr><tr><td>20-30<br/></td><td>9<br/></td></tr><tr><td>30-40<br/></td><td>12<br/></td></tr><tr><td>40-50<br/></td><td>$f_2$<br/></td></tr><tr><td>50-60<br/></td><td>3<br/></td></tr><tr><td>60-70<br/></td><td>2<br/></td></tr><tr><td>Total<br/></td><td>40<br/></td></tr></tbody></table>

Question 20 :
For the positive numbers, $n, n + 1, n + 2, n + 4$ and $n + 8$, the mean is how much greater than the median?