Question

19) The demand for vegetarian sandwiches each day for eight consecutive days is given below. Find the standard deviation.

                                               16   19   25   24   26   22   44   28

a) 1.49

b) 8.42

c) 31.97

d) 4.8

18) The _______ is the difference between largest and the smallest data values.

a) Median

b) Mean

13) The amount of Jen's monthly phone bill is normally distributed with a mean of $55 and a standard deviation of $12. What percentage of her phone bills are between $19 and $91? Use the Empirical Rule.

a) 25%

b) 95.45%

c) 99.73 %

d) 15.86%

e) 68.27%

c) Standard deviation

d) Mode

e) Range

Answer 1

19)Standard deviation is 8.42  

Correct option is b 8.42

18) the difference between largest and smallest data value is range.

Hence correct answer is range.

13) 99.73 percentage of her phone bills are between $19 and $91.

Correct option is C. 99.73%