1. A survey of the number of calls received by a

sample of Southern Phone Company subscribers last week revealed the following

information.

52, 43, 30, 38, 30, 42, 12,

46, 39, 37, 34, 46, 32, 18, 41, 5

a) Develop a stem-and-leaf chart. Note: A typical row for the Stem & Leaf

plot might look like 3Ãª0269. Where,

the vertical line is obtained by using â€œShift & |â€ key. The line is

inserted at the location of the cursor.

b) What basic conclusions can

be drawn from this chart?

c) Compute the 5 number System

for this data set and list Xmin, Q1, Q2, Q3 & Xmax. See Videos â€œ5_Number_Sysytemâ€in Videos â€“Topics In Stat 230.

2. The chart below gives the

percentage of counties in the US that use various methods for recording votes

in 1980 & 2002. Set up side-by-side

bar charts by year using the instruction for Side-By-Side Charts in the Class

Notes Conference. Copy/Paste your Chart

into the TFE Editor from EXCEL.

METHOD

1980

2002

Punch cards

18.5

15.5

Lever machines

36.7

10.6

Paper ballots

40.7

10.5

Optical scan

0.8

43.0

Electronic

0.2

16.3

Mixed

3.1

4.1

3. The following are a sample

of the weights of nine jars of peanut butter.

7.69, 7.72, 7.80, 7.86, 7.90, 7.94, 7.97, 8.06, 8.09

a) Compute the median weight.

b) Compute the standard

deviation of the sample using the shortcut formula. Show the formula and values for each term and compute the answer. Use the TFE Equation Editor.

c) Compute the 5 Number System for this data. Just list the values as Xmin=xxx,

Q1=xxx,Q2=xxxx,Q3=xxxxx, Xmax = xxxx.

d) Are there outliers? An

outlier value is defined as unusually large or small according to the

expressions: Answer yes or no.

Outlier > Q3 + 1.5(Q3-Q1) or,

Outlier < Q1-1.5(Q3-Q1) (20 %) 4. Answer questions a. through f. of 3.23 below. NOTE: The Bienayme-Chebyshev Rule is the same as the Chebyshevâ€™s Rule in Table 2.6 of your text. .gif">

(20 %)

5. Compute the mean and standard deviation for

the data in the table below. State your assumptions and show all calculations.

Distance

Frequency

0 to 5

5 to 10

10 to 15

15 to 20

20 to 25

4

15

27

18

6

6. A box

contains 3 red balls and 4 green balls.

If two balls are randomly selected in sequence, without replacement, what is the possibility that a red ball and a

green ball are picked out of the box. State the rule for P(A&B) and then

substitute the values and compute the answer.