Women Are Better Leader Than Men

Topics: Standard deviation, Arithmetic mean, Mean Pages: 4 (552 words) Published: January 17, 2013
/ t

The following data indicate the weight of 40 cultured tiger prawn (in gm) at the end of months in a pond.

3

25 55 46 50 30 t2 20 30 59 15 75 28 13 65 66 43 57 25 33 57 23 14 22 45 20 2s 20 35 19 22 40 t4 28 15 61 38 19 70 13 22

Weight of cultured tiger prawn

i. ii.
( Z. '

Construct a stem-and-leaf display for the data given using the ten digit as the stem. What can you say about the distribution of the weights of tiger prawn. Construct a frequency distribution for the above data, using 0 - 9 as the first class. Draw a histogram a frequency polygon. Use the histogram to find median.

The following data show the number of customers who enter bookshop A and bookshop B each hour from 10:00 am to 9:00 pm on a certain day. Bookshop A: 14, 31, 2, 25, g, 21, 19, 29, 16, 17, 10 Bookshop B: 3, 5, 6, 7, 8, 10, 12, 14, 19, 21, 22

Draw two box-plots to compare the number of customers that enter the bookshop A and B hourly. Describe the distribution.

/3.

The following is the systolic blood pressure, in mm Hg, of 10 patients in a hospital.

165 135 151 155 158

146 t49 124 162

173

a. b.

Find the mean and the standard deviation of the systolic blood pressure of the l0 patients. Find the number of patients whose systolic blood pressure exceed one standard deviation above or below the mean. numbers: 550, 450, 400, 750, sTPM200l.Q1

f Find the median and the semi-interquartile range for the following 650,700,850,500 I

The number of personal computers sold in a week by a company for a period of 25 given as follows:

weeks
15

is

a. Find the mean and the standard deviation of the number of personal computers sold in a week in b.

7

10 s

7 4418914t7il845 10 12'14 10 9 29 7

6

5

20

c.

weekaccordingtoclassintervalsl-5,6-10, 1l-15, 16-20and21 -3}.Hence,ploia histogram corresponding to this grouped data and state the shape of the distribution sTPM2000.Q9

the given period. Find the percentages of the week...
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