2. Weights in grams of randomly selected chocolate candies are represented in the table below. Find the range and
standard deviation.
0.954 0.911 0.923 0.881 0.937 0.884 0.912 0.912 0.955 0.947 0.918
Find the range r= 0.074 g
Find the standard deviation
S=0.0253 g round to four decimal places as needed.
3. consider a distribution of the weights of cars in the new car lot at a car dealership in which about half inventory
consists of compact cars and the other half consists of sport utility vehicles.
How many models would you expect for the distribution? Would you expect the distribution to be symmetric, leftskewed, or right skewed?
Choose the correct answer below.
a. two modes; right skewed
b. one mode; symmetric
c. two modes; symmetric
d. one mode; right skewed
4. blood alcohol concentration of drivers involved in fatal crashes and given jail sentences are listed below. Find the
range and standard deviation
0.27
0.19
0.19
0.15
0.13
0.24
0.22
0.22
0.14
0.15
0.11
0.32
find range r= 0.21
find the standard deviation
s= 0.063 round to the nearest thousand as needed
5. suppose you have scores of 90, 95,100, and 95 on quizzes in a mathematics class. Complete parts (a) through (c)
what is the mean of these scores? 95
What score would you need on the next quiz to have an overall mean of 95? 95
If the maximum score on a quiz is 120 is it possible to have a mean of 100 after the fifth quiz? Yes
6. A grocer has three baskets of peaches. One holds 40 peaches and weights 19 pounds, a second holds 55 peaches
and weighs 23 pounds, and the third holds 65 peaches and weights 24 pounds.
Peaches: 40+55+65 = 160
Weight: 19+23+24 = 66 pounds
What is the mean weight of all of the peaches combined? The mean weight is 160/66 = 2.42 pounds Pound round
to the nearest hundredth as needed.
7.Weights in grams of randomly selected chocolate candies are shown below. Find the mean. Median, and mode of the
listed numbers.
0.957
0.912
0.844
0.927
0.932
0.881
0.915
0.913
0.958
0.946
0.920
the mean is0.9186 g round to four decimal places as needed.
The median is 0.92 g round to four decimal as needed
What is the mode? Selected the correct choice below and, if necessary, fill in the answer box within your choice.
a. the mode is …..g? use comma to separate answers as needed
b. there is no mode
8. in an analysis of the accuracy of weather forecasts, the actual temperatures are compared to the high temperatures
predicted one day earlier and the high temperatures predicted five days earlier. Listed below are the errors between
the predicted temperatures and the actual high temperatures for consecutive in a city. Do the standard deviations
suggest that the temperatures predicted one day in advance are more accurate than those predicted five days in
advance, as we might expect?
Data table actual high – high predicted one day earlier
-3
2
0
0
2
-1
1
-1
6
1
0
-1
0
2
actual high – high predicted five day earlier
0
-2
1
4
-7
-9
7
-2
-2
-1
7
-5
the correct answer is yes or no
4
-1