ദ്വിതീയ ഡാറ്റ ശേഖരിക്കുമ്പോൾ അന്വേഷകൻ അറിഞ്ഞിരിക്കേണ്ട വസ്തുതകൾ

1. ശേഖരിച്ച മിച്ച ഡാറ്റ റ്റയുടെ ഭൂപ്രദേശം.
2. ഡാറ്റ ശേഖരിച്ച സമയം.
3. ഡാറ്റ ശേഖരണത്തിൽ ഉൾപ്പെട്ടപദങ്ങളും നിർവചനങ്ങളും.
4. ഡാറ്റ ശേഖരിച്ച വ്യക്തിയും അത് ശേഖരിക്കാനുണ്ടായ ഉദ്ദേശ്യവും

ശേഖരിച്ച് വിലയിരുത്തപ്പെട്ട, പ്രസിദ്ധീകരിച്ചതോ അല്ലാത്തതോ ആയ ഏതൊരു വിവര സ്രോതസ്സും അറിയപ്പെടുന്നത്

ചോദ്യാവലിയിൽ ഉൾപെടുത്താൻ കഴിയുന്ന ചോദ്യങ്ങളുടെ എണ്ണം എത്ര ?

ഒരിക്കൽ ചോദ്യാവലി തയാറാക്കി കഴിഞ്ഞാൽ, ആ ചോദ്യാവലി ഉപയോഗിച്ച് ഒരു ചെറിയ ഗ്രൂപ്പിൽ ഒരു മുൻപരിശോധന നടത്തുന്നത് അഭികാമ്യമായിരിക്കും. ഇതിനെ വിളിക്കുന്ന പേര്

ഒരു പ്രത്യേക ആവശ്യത്തിനോ ആവശ്യങ്ങൾക്കോ ആയി ഡാറ്റ ശേഖരിക്കുന്നതിന് യുക്തിപരമായി ക്രമീകരിച്ചിട്ടുള്ള ചോദ്യങ്ങളുടെ ശ്രേണിയാണ്

The variance of 6 values is 64. If each value is doubled, find the standard deviation.

Find the range of 11, 22, 6, 2, 4, 18, 20, 3.

Find the mode of 1,2,3,5,4,8,7,5,1,2,5,9,15 ?

Find the mean of the prime numbers between 9 and 50?

What is the difference between the mean and median of set S = {2, 4, 6, 7, 7, 13, 18, 92}?.

What is the difference between the median and mode of S={1, 2, 4, 4, 8, 14, 32, 64}?.

What is the relation among mean, median & mode ?.

If the mean of 5 observations x +1,x + 2, x + 3 , x + 4 and x + 5 is 15 then what is the mean of the first 3 observations?

The mean deviation about mean of the values 18, 12, 15 is :

The average of a set of 30 numbers is 25. If three numbers 13, 15 and 20 are discarded, then the average of the remaining numbers is

The measure of dispersion which uses only two observations is called:

Any measure indicating the centre of a set of data, arranged in an increasing or decreasing order of magnitude, is called a measure of:

The sum of the squares of the deviations of the values of a variable is least when the deviations are measured from:

The sum of deviations taken from mean is:

If the value of mean and mode of a grouped data are 50.25 and 22.5 respectively, then by using the empirical relation, find the median for the grouped data.

Study the following graph and answer the question given below. The below Histogram shows the data of the annual rainfall (in cm).

Find the difference in the number of times the rainfall above 130 cm and the number of times the annual rainfall below 130 cm.

Study the following graph and answer the question given below. The below Histogram shows the data of the annual rainfall (in cm).

The number of times annual rainfall below 120 cm is what percent of the number of times the annual rainfall above 130 cm?

Study the following graph and answer the question given below.

What percentage (approx.) of the employees working in the range of Rs. 30,000 - Rs. 40,000?

If the median and the mode of a set of data are 12 and 15, respectively, then find the value of thrice the mean of the same data set.

If A, B and C are denoting Mean, Median and Mode of a data and A ∶ B = 9 ∶ 8 then the ratio of B ∶ C is:

The standard deviation of the data 6, 5, 9, 13, 12, 8, 10 is

The variance of 6, 8, 10, 12, 14, 16 is:

The mean of the observations 29, x + 1, 33, 44, x + 3, x + 6 and 46 is 39. Then, the median of the observations is :

The median of the observations 11, 12, 14, 18, x + 2, 22, 22, 25 and 61, arranged in ascending order, is 21. Then, value of 3x + 7 is:

The mean of 10 observations was calculated as 40. It was detected on rechecking that the value of one observation 45 was wrongly copied as 15. Find the correct mean.

A sales executive marketed 84 items in a week on an average with a standard deviation of 18. Find the coefficient of variation:

Find the variance of first 30 natural numbers

Find the variance of first 10 natural numbers

What is the square of standard deviation is called

Calculate the sd of the following data 3, 4, 9, 11, 13, 6, 8, 10.

Which of the following is the minimum value of standard deviation

Which of the following not false

1. the square root of the mean of squares of deviations of observations from their mean is standard deviation
2. The variability of a data will decrease if sd increases
3. The stability or the consistency of a data increases as sd decreases
4. The data with less sd is better than a data with high sd provided that the two data were expressed with the same unit.

the square root of the mean of squares of deviations of observations from their mean is called

Find the mean deviation about the median for the following data 3, 9, 5, 3, 12, 10, 18, 4, 7, 19, 21

Determine the mean deviation for the data value 5,3,7,8,4,9

Find the range of numbers 8,6,5,2,1,10,16,19,22,26,25