2020_1 NOUN TMA Questions & Solutions: EDU821 - Educational Statistics
Abe has just found that the variance of a sample of 32 observations to to be 64.0. What then is the standard deviation of the sample?
In the evaluation of the last general election, Nigerians were asked to rate the conduct of the election as Very Good, Good and poor. This is an example of
Answer: ordinal scale
Temperature is an example of a variable that uses:
Answer: the ratio scale
In a questionnaire, Gender is an example of:
Answer: nominal scale
If the standard deviation of a sample of 50 observations is 6.0, what is the variance of that sample?
If the 6th and 7th data in a set in an ascending order are 2x and 2.5x respectively, calculate the value of x if the median of the given set of data is 4.2
Which of the following is not a measure of dispersion?
Answer: the 50th percentile
The difference between the largest and the smallest data values is the
The level of measurement that allow the rank ordering of data items is:
Answer: ordinal measurement
The most frequently occurring value of a data set is called the
The spearman rank correlation is
Answer: a correlation measure based on rank-ordered data for two variables
The sum of deviations of the individual data elements from their mean is
Answer: sometimes greater than and sometimes less than zero, depending on the data elements
If the size of a population is N and the size of a sample is n, then the correct relationship between N and n is
The following represents age distribution of students in an elementary class. Find the mode of the values: 7,9,10,13,11, 7, 9, 19, 12,11,9, 7, 9,10,11.
Which of the following is not a measure of central location?
The value that has half of the observations above it and half the observations below it is called the
Where a data set has an even number of observations, the median
Answer: is the average value of the two middle items when all items are arranged ascending order
AÂ Principal asked students in a class their ages. On the basis of this information, the Principal gave the average age of all the students in the whole school as 21 years. This is an example of
Answer: a statistical inference
Calculate the mean deviation of the following data correct to one decimal place: 3,5,8,11,12 and 21
Find the interquartile range of the following set of marks: 2,2,3,1,6,4,3,4,3,5.
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