Use the distribution in the form of the stem-leafplot.
Stem Leaves
1 1478
2 01237888
3 189
16/ The mid-point of the third class is
A./ 32 B/ 36C/ 34.5 D/ 35
17/ The median is
A./ 24 B/ 23 C/ 25 D/5
18/ The relative frequency for the third classis:
A./ 20% B/ 50%C/ 66% D/ 40%
19/ The heights of a group of professional basketballplayers are summarized in the frequency distribution below. Findthe mean height from this frequency table.
Height s (in) Frequency
70-72 4
73-75 6
76-78 8
79-81 2
A./ 75.2 in B/ 76.8 inC/ 74.0 in D/ 77.5in
20/ The temperatures ( in ºF ) in a room is recorded atthe top of hours are
67, 68, 70 , 5, 77, 77, 78, 80, 78, 79, 74, 74. Choosebest answer:
a/ It is a typo
b/ highest temperature is probably95
c/ 5 is not an outlier
d/ 5 is an outlier
21/ The variance of 6 washing machines withprices: $ 800, $784, $ 1,235, $860, $1,036 and $770is
A/ 196.4 B/ 34,295.3 C/ 26,002.7 D/185.2
22/ The coefficient of variation ( round to closest %) forthe set of data :
1, 3, 3, 5, 5, 6, 7, 8, 9 ,12, 15,24 is
A 74% B/ 67% C/ 24% D/ 78 %
23/ Human body temperatures have the mean of98.2º and a standard deviation of 0.6º.
Amy’s temperature can be described by z = 0.9. What isher temperature?
A/ 98.2º B/ 97.8º C/ 98.7º D/99.3º
24/ The upper bound for the outlier for the dataset
-11, 14, 22, 22, 22, 23, 31, 31, 42, 44, 44,75 is
A/ 74.5 B/ 75 C/ 84 D/ 68
25/ The box-plot of a data with 5- point summary 2, 6, 8, 11, 18
A/is positive skewed. B/ is negative skewed.
C/ is symmetric D/ perfect skewed
