The following table gives the hours spent by 50 students in the playground in a week:
| Hours | 0 | 2 | 4 | 6 | 8 | 10 | |||||||
| No. of students | 10 | 6 | 8 | 6 | 10 | 10 | |||||||
Calculate the mean median and standard deviation of the hours required by students.
Sure, to find the mean, median, and standard deviation of the hours spent by students in the playground, we can start by calculating the values.
Firstly, we need to compute the midpoint of each class interval. The midpoint is obtained by adding the upper and lower limits of each class and then dividing __________ _____ _____ _______ ________ ____ ___ ________.
______ ______ ______ ______ _____ ____ _________ __________ ______.
_________ __________ ________ ___ _________ ______ ___ ______.
_____ __________ ___ __________ ___ ____ _________ _________ _____ ______.
___ _____ ______ _________ __________ __________ _______ ________.
____ _________ _______ ________ ___.
________ ______ _____ ____ _____ ___ ______ ________ _____.
____ __________ _______ __________ _________ ________ ___.
______ ______ ___ ______ __________ ___ _____.
_____ ______ _____ _________ ______ _____ _______ _________.
____ ___ __________ _______ ___ ________ ______ ______ _____ ____.
_____ _______ __________ ___ ________ ______ _______ ________ ___ _________.
______ ____ ____ __________ ___.
________ ______ ___ _____ __________ _____ _______.
_______ ___ _______ _________ _____ _____ _______ __________ ________ _________ ______.
_______ _________ _________ _____ ________ _________ _______.
_____ ________ ____ ______ ____ _______ __________ ___ _______ _____.
____ _______ __________ _______ _________ _____ ___ _________ ________ _________ _________.
___ _________ _____ _______ ______ ____ ____ ________ ____.
________ ______ ________ _______ __________.
_____ ________ _____ _________ ___ ________ _____.
__________ ____ _______ _________ _________ ___.
_____ _____ __________ ________ _________ _____ ________ ___.
___ _____ _________ ___ _____ ___ __________ ____ ________ __________ _____.
________ ____ _________ ______ _______ _____ ____ _________ ___.
______ ________ ____ ____ ____ __________ ___ _________ _______ _______ ______ ________.
___ _____ _______ __________ __________ ___ ________ ___ ____.
______ _____ __________ ___ ___ ________ ___ _________ ________ _______ ________ ______.
__________ ________ ____ ______ ________ _________.
______ _________ _________ __________ __________.
_________ __________ _________ ________ ______ _______.
_______ __________ _________ __________ ______ _______ ______ ___ _________ _______ _________ ________.
________.
Get Full Answer on WhatsApp
A box contains 10 screws, 3 of which are defective. Two screws are drawn at random. Find the probability that none of them is defective, if the sample is drawn (i) with replacement,
(ii) without replacement.
In a television appearance, an MLA from a state asks voters in that state to indicate whether the MLA should vote against or for a particular piece of legislation. The MLA office receives 4100 replies. Since voters from western part tends to be democrats while those from eastern parts tend to e communists, the MLA divides the replies on the basis of their geographical origin. 68% of the replies from the western part are against the legislation and 36% of the replies from the eastern part are against it.
(i) Did the MLA carry out a stratified sampling?
(ii) Did the MLA carry out a stratified random sampling?
(iii) How would you justify the sample design?
(iv) What improvements would you suggest?
Consider a population of 11 schools from which a sample of size 3 is to be selected. List all the possible samples by circular systematic sampling.
Plating of gold on wrist watches requires a chemical called . AiCI 3 Concentration of the chemical that is added to the solution is an important factor. The objective is to choose that concentration for which plating is uniform. Three concentration of AiCI 3 chosen were 5%, 15% and 20%. These were added in the solution and plating was done and thickness (in units) measured on 5 samples is gives below
 Sample® ¯ Conc. of AiCI3 | 1 | 2 | 3 | 4 | 5 | ||
| 5% | 3 | 2 | 4 | 2 | 4 | ||
| 15% | 4 | 4 | 3 | 2 | 4 | ||
| 25% | 3 | 3 | 4 | 4 | 2 | ||
A researcher measures the temperature of a solution 5 times. The observations are 25, 32, 27, 29, 30 o C. Determine an unbiased estimate of the temperature.
A manufacture of rayon wants to compare that the yield strength of 5 11⋅ kg/ 2 mm is met or not at 5% level of significance. The manufacturer draws a sample and calculates the mean to be 8 12⋅ kg/ 2 mm and the standard derivation is known to be 2⋅0kg/ mm . 2 Carry out the statistical test appropriate for this.
Two cards are drawn simultaneously or successively without replacement from a well-shuffled deck of 52 cards. Find the probability distribution of number of aces (x) Give a graphical representation of probability distribution.