A wall clock strikes the bell once at 1 ...

A wall clock strikes the bell once at 1 o' clock, 2 times at 2 o' clock, 3 times at 3 o' clock and so on. How many times will it strike in a particular day. Find the standard deviation of the number of strikes the bell make a day.

Text Solution

Verified by Experts

The correct Answer is:

6.9 (approximately)

Topper's Solved these Questions

STATISTICS AND PROBABILITY
PREMIERS PUBLISHERS|Exercise SOLUTION TO EXERCISE 8.2|9 Videos
STATISTICS AND PROBABILITY
PREMIERS PUBLISHERS|Exercise SOLUTION TO EXERCISE 8.3|33 Videos
RELATIONS AND FUNCTION
PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT OBJECTIVE TYPE QUESTIONS|25 Videos
TRIGONOMETRY
PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT OBJECTIVE TYPE QUESTIONS|22 Videos

Similar Questions

Explore conceptually related problems

If a clock strickes once at 1 o'clock, twice at 2o'clock, thrice at 3 o'clock and so on. How many times will it strikes in day?

What is the angle between two hands of a clock when the time in the clock is (a) 9’O clock (b) 6’O clock (c) 7:00 PM

Length of the shadow of a 15 meter high pole is 5sqrt3 meters at 8 O'clock in the moming. Then, what is the angle of elevation ofthe Sun rays with the ground at the time?

Find the number of all possible matrices of order 3xx3 with each entry 0 or 1. How many of these are symmetric ?

If A is a 2times3 matrix and B is 3times4 matrix, how many columns does AB have

The pendulum of certain clock has time period 2.04 s. How fast or slow does the clock run during 24 hours?

150 workers were engaged to finish a piece of work in a certain number of days. Four workers dropped from the work on the second day. Four workers dropped on third day and so on. It took 8 more days to finish the work. Find the number of days in which the work was completed. [Let the no.of days to finish the work is 'r' then 150 x = (x+8)/2 [2 xx 150 + (x+8-1)(-4)]

PREMIERS PUBLISHERS-STATISTICS AND PROBABILITY -OTHER IMPORTANT OBJECTIVE TYPE QUESTIONS

A wall clock strikes the bell once at 1 o' clock, 2 times at 2 o' cloc...
Text Solution
|
If the sum and mean of the data are 418 and 11 respectively then the n...
Text Solution
|
The coefficient of range of the data 20, 62, 43, 48, 13, 34, 39, is :
Text Solution
|
If the standard deviation of the data 2, 3, 5, 7, 8, is 2.28 what will...
Text Solution
|
The variance of first 10 natural numbers is:
Text Solution
|
The mean of the data is 16 and the coefficient of varation is 12.5. Fi...
Text Solution
|
Batsmen A and B have their coefficient of variation as 13.5% and 25% r...
Text Solution
|
When a dice is thrown, the probability of getting an odd number is:
Text Solution
|
When two dice is thrown, the probability of getting sum of the number ...
Text Solution
|
A bag contains 6 blue balls and 5 green balls and 2 red balls. A ball ...
Text Solution
|
Two dice are rolled. Find the probability that the sum of the outcome ...
Text Solution
|
From a well shuffled pack of 52 cards one card is selected at random. ...
Text Solution
|
A year is selected at random. What is the probability that {:("(...
Text Solution
|
Three fair coins are tossed together. Find the probability of getting ...
Text Solution
|
If P(A)=0.5, P(B)=0.3, P(AcapB)=0.25. Find P(AcupB)
Text Solution
|
Ia A and B are mutually exclusive, given P(AcupB)=(3)/(5), P(A)=(1)/(2...
Text Solution
|
Given A and B are mutually exclusine events P(not A)= 0.35 P(AcupB)=0....
Text Solution
|
Find the odd one out:
Text Solution
|
The sum of all deviations of the data from its mean is
Text Solution
|
The range of 6, 6, 6, 6, 6, 6, 6 is:
Text Solution
|
If the standard deviation of a, b, c is sigma this standard deviation ...
Text Solution
|