In a histogram, frequency=frequency density×class width, the area=frequency, and the vertical axis is labelled as ______
y
frequency
frequency density
x
For Box-and-Whisker Plots, it has the advantage that easily interpreted and comparisons can easily be made. Which of the following is/are true?
It gives five numbers summary: Lowest and highest values Lower and upper quartiles Median
Mean & standard deviation most useful when data roughly symmetrical & contains no outliers
Median and interquartile range typically used if data skewed or if there are outliers
All of the above
The lower quartile of the prices of the caravans in the showroom =_____.
The interquartile range is 19. The value of x =______.
IQR=______.
Given that for variable A, median = 0.186, then its interquartile range (IQR) =______.
(i) Estimate how many leaves have a length between 14 and 24 cm: ________ .(integers)
(ii) 10% of the leaves have a length of centimetres or more. The estimated the value of _______ (integer).
Median = _____(1 dp)
UQ = 18.8, LQ = 12.7, IQR = 18.8 – 12.7
True
False
The value of a=______.
Number of cars length less than 3.20 m
Number of cars length less than 3.20 m
In stem-and-leaf diagram, do not forget to indicate the ____.
Which is False
The modal age group is 30-35 years
The modal age group is 40-65 years
Total number of fathers =
No. fathers were between 25 and 30 years old=
standard deviation=_____.(3 s.f.)
The standard deviation =_____. (3 s.f.)
In its histogram, the 1 − 10 rectangle has height 3 cm. Which is True
x = 15, The the height of the 51 − 70 rectangle =
, The the height of the 51 − 70 rectangle =
The estimate of the mean time =_____ minutes (3 s.f.)
estimates of standard deviation= _____. (3 sf)
There are 190 people.to complete a race. The estimates of the standard deviation= ____ (3 sf.)