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STA301 Quiz 1

Statistics and Probability PDF 94 KBUpdated 23 Oct 2026
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Quiz STA301 Quiz 1 PDF 94 KB
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STA301 Statistics and Probability
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PDF 94 KB
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23 Oct 2026
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  1. Harmonic means is the reciprocal of ? arithmetic mean
  2. How many percent corresponds to Q1 if you will interpret it ? 25
  3. What is the mode in the word MATHEMATICS ? T,A, M
  4. The middle value of an ordered array of numbers is the ? median
  5. Geometric mean gives the equal weightage to ____ values ? all the observations
  6. If 10% added to each value of variable, the geometric mean of new variable is added by ? 10%
  7. The total number of observations, which are below a certain value are known as ? cumulative frequency
  8. The sum of deviations of the observation from their mean is ? Always Zero
  9. In a commutative frequency polygon, the cumulative frequency of each class is plotted against ? Upper class boundary If an observation in the date set is zero, then its geometric mean will be? Zero Data arrangement in order of magnitude is called ? arrayed date For a stem-and-lead display ? all of the above The most frequent value in the data is called ? mode The mode value from raw data can be obtained by the help of ? dot plot The value of the middle term in a ranked (ordered) data set is called the ? median A list of 7 pulse rates is : 70,64,80,74,92,96,98 what is the median for this list ? 80 Relationship among the averages ? AM ≥ GM ≥ HM If we place a vertical mirror in the center of -------------- the left hand side will be the mirror image of the right hand side ? symmetrical distribution Which one is the formula of mid range ? (x0+xm)/2 What is the mode for the following set of data (1,m,d,n,2,d,2,d,s,5,5,7) 2,d,5 What is the mode in the word TOMATO? T and O Decumulative frequency is presented by ? less than ogive A histogram is consists of a set of adjacent rectangles whose bases are marked off by ? Class Boundaries The median is ? the middle point Frequency polygon is constructed by plotting frequencies against their ? class marks If the sum of reciprocal of the values of a data is 256.7 and the n=23, then harmonic mean will be? 0.0895 In case of an open-ended class ? the distribution is always positively skewed In the construction of a frequency distribution the steps are to? All of these the mean of a distribution is 23 the median is 24 and the mode is 25.5. it is most likely that this distribution is ? Positively skewed Which of the following comes first to make frequency distribution ? range historigram and histogram are ? Not same The _______ is often the preferred measure of central tendency if the data are severely skewed? Median The median of the values are 1,2,4,5,7? 4 As the number of observations and classes increase, the shape of a frequency polygon ? tend to smooth Which of the following is equal to mean in a symmetrical distribution ? all of these Which one is the formula of mid quartile range? Q1+Q3/2 If any of the value in the data set is negative then it is impossible to compute ? Geometric Mean Find the range of these values 24,23,20,15,17,19 ? 9 The free-hand frequency curve is actually a ? theoretical concept It is recommended that the number of classes in a frequency distribution be between ? 5 and 20 The number of times each value appears is called the value’s ? frequency For the given data 20,13,27,0,-8, G.M will be ? 0 Quantiles are? Points on a distribution which split it into equal- sized portions The number of classes in a frequency distribution generally should be ? between five and twenty In a cumulative frequency polygon, the cumulative frequency of each class is plotted against. Upper class boundary

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