Surname(e.g. Straayer), Given Name(e.g. Dave), class mtg. time
Eyeglassomatic manufactures eyeglasses for different retailers. The number of days it takes to fix defects in an eyeglass and the probability that it will take that number of days are in the table.
1.
Enter the data from the first two columns into two lists (for example, L
1
and
L
2
). The second column should be entered, for example, as 0.249 and not
24.9
2.
3.
4.
5.
6.
Perform 1-Var stats on the tables. The probabilities are the second list, entered as the frequency list. With older firmware, you would enter this as
1-Var Stats L
1
, L
2
With newer firmware, it is a form with “List:” and
“FreqList:” entries.
What is the sum of the probabilities: _______________
What is the average (mean): __________
What is the standard deviation: ________________ ( of the usual Sx for standard deviation)
 x in this case, instead
What is the probability of taking 3 or fewer days: ___________
14
15
16
10
11
12
13
17
18
Col 1:
Number of days
1
8
9
6
7
4
5
2
3
Col 2:
Probabilities
1.4%
1.0%
0.8%
0.7%
0.4%
0.2%
0.2%
0.1%
0.1%
24.9%
10.9%
9.2%
12.4%
13.3%
11.5%
7.1%
3.9%
1.9%
Col 3:
Cumulative
Probs.
24.9%
35.8%
45.0%
57.4%
70.7%
82.2%
89.3%
93.2%
95.1%
96.5%
97.5%
98.3%
99.0%
99.4%
99.6%
99.8%
99.9%
100.0%
7.
What is the probability of taking at least 4 days: __________
8.
What is the sum of the previous two probabilities: _________
9.
What is the probability of taking 9 or fewer days: ___________
10.
What is the probability of taking at least 10 days: __________
11.
What is the sum of the previous two probabilities: _________