# STT205

## Category:STT205

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STT205

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A.
Scores that differ greatly from the measures of central tendency are called:_________

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B. Calculate the standard deviation of the set of data in the table below

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C. ______ is not a measure of dispersion

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D. Suppose there are 70 students in an examination with the students writing at least one of the subjects; Chemistry, Physics and Biology. Thirty(30) students offer Physics, 33 offer Chemistry and 40 offer biology, 10 students offer both Physics and Chemistry. Fourteen (14) of the students offer Physics and Biology, and 15 of them offer Biology and Chemistry. How many students offer only Biology

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E.
The sum of the squares of the deviations about mean divided by the number of observations is: ________

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F.
Given X1=20 and X2=-20. The arithmetic mean will be: ________

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G. What is the probability of not getting a 1 in the toss of a single die?

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H. The 75th percentile is the same as the ____ quartile

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I.
The arithmetic mean is highly affected by: ________

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J. An impossible event has the probability ______

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

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L.
If a constant value is added to every observation of data, how would the value of the arithmetic mean behave? ________

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M.
The sample mean X- is an example of a: ________________

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N. The square root of the sum of deviations of a set of numbers from their arithmetic mean is ___________

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O. What is the range of the set of data in the below

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P. What is the relative cumulative frequency of 50 in the table below

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Q. A set of data with only one mode is said to be __________

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R.
If the arithmetic mean of 20 values is 10, then sum of these 20 values is:_____

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S.
The frequency distribution of the hourly wage rate of 60 employees of a paper mill is as follows: The mean wage rate is:N______

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T. 36. If 5, 8, 6 and 2 occur with frequencies 3, 2, 4 and 1 respectively, find the mean

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U. ____ statistics deals with methods of organizing, summarizing and presenting data in an informative way

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V.
The first step in calculating the median of a discrete variable is to determine the: _______

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W.
If the arithmetic mean of the two numbers X1 and X2 is 5 if X1=3, then X2 is:_________

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X. What is the geometric mean of 3, 5, 6, and 7

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Y.
The suitable average for qualitative data is: ________

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Z.
What effect will the elimination of extreme scores at the bottom of a data set have on the mean? ______

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AA. ____ is not an axiom of probability

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AB.
The population mean Î¼ is an example of a: _________

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AC.
The elimination of extreme scores at the top of the set has the effect of:_________

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AD. A student scored 45% in MTH101, 62% in MTH102, 30% in BUS103, and 70% in ACC101. Find his GPA if the respective credits are 3, 2, 2, 3

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AE.
Ten families have an average of 2 boys. How many boys do they have together?

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AF. Which of the following statement does not represent a role of statistics in the society?

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AG.
The midpoint of the values after they have been ordered from the smallest to the largest or the largest to the smallest is called:____

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AH.  Which of these is closer to the mode for a skewed distribution?

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AI. The following are examples of discrete random variables except

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AJ.
If âˆ‘i=110Xi-50=100 then sample mean X- will be: ________

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AK. Primary data is not collected through ___________

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AL. The square root of the sum of deviations of a set of numbers from their arithmetic mean is

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AM.
The sum of deviations taken from mean is: _______________

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AN. A frequency curve of a normal distribution is ____ shaped

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AO.
The median is considered a robust measure because it is resistant to: ________

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AP. A characteristics that assumes different values for different entities is called __________________

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AQ.
Step deviation method or coding method is used for computation of the______

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AR.
Sum of absolute deviations of the values is least when deviations are taken from: ________

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AS. Calculate 70% of the mean of the set of data in the table below

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AT. The sum of the frequencies of 16 and 18 in the table below is _____________

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AU. ____ is not an advantage of secondary data

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AV.
The arithmetic mean of 10 items is 4 and the arithmetic mean of 5 items is 10. The combined arithmetic mean is: ______

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AW. If at least one of the events of an experiment can occur, then they are said to be ________ events

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AX. There are 5 different items to be stocked in a store with 3 bins for the storage. What are the possible number of arrangements?

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AY. _____ is the degree of peakness of a distribution

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AZ. What is the sum of the medians of {3, 4, 4, 5, 6, 8, 8, 10} and {5, 5, 7, 9, 11, 12, 15, 18}

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BA.
The total of all the observations divided by the number of observations is called: ______

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BB.
When all the values in a series occur the equal number of times, then it is not possible to calculate the:__________

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BC. If the mode of the distribution is X the [frac{X}{2}] in the table below is _____________

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BD. Suppose there are 70 students in an examination with the students writing at least one of the subjects; Chemistry, Physics and Biology. Thirty(30) students offer Physics, 33 offer Chemistry and 40 offer biology, 10 students offer both Physics and Chemistry. Fourteen (14) of the students offer Physics and Biology, and 15 of them offer Biology and Chemistry. Find the number of students that offer all subjects

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BE.
The sum of deviations is zero when deviations are taken from:________

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BF. A Poisson distribution is given by [p(x)=frac{0.72^{x} e^{-0.72}}{x!}]. Calculate the variance

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BG. What is the cumulative frequency of 40 in table below?

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BH. The first step involved in constructing a group frequency distribution is to _________ (a) (b) count the number of items

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BI.
When the values in a series are not of equal importance, we calculate the: _____________

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BJ. In an examination the score obtained is weighted 3 times as much as a test score. If a student scored 85% in the examination with a test score of 90%, what is his mean score

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BK. Which of the following is not a source of data?

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

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BM. The addition rule of probability is used for ___ events

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BN. The difference between the harmonic mean of 2, 4, 8 and their geometric mean is __________

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BO.
The mean of 10 observations is 10. All the observations are increased by 10%. The mean of increased observations will be: ______

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BP. The empirical relationship between the mean and median is given by; mean �?? mode = x(mean �?? median) in the table below . Then x is _________________

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BQ.
If the smallest observation in a data is decreased, the average which is not affected is: ____

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BR. Any arrangement of r objects selected from a single group of n possible objects is called a ___________

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