Statistics and Probability for Business Management 1100
Assignments

Rules

• All assignments should be your individual work; otherwise, points will be deducted. [Students who wish to work together on homework should request my permission to do so in advance.]
• Because answer keys are made available after homework is turned in, late homeworks will not be accepted. In a valid emergency, your recitation instructor may make an exception.
• Your homework should be neat and well-organized. Show your work and circle your answers. Your recitation instructor is a student like you and will not take time to decipher poor handwriting, put pages in order, or read notes scrawled in margins.
• Be sure to write or print your name at the top of the first page of your homework. Put your name or initials at the top of each additional sheet of paper or computer output. Staple your pages together.
• Answer keys are placed on file in the Math-Stat Library on Friday mornings after assignments are handed in. They are on two-hour reserve so that you can take them out to be copied.
• Computer output must be annotated and explained in order to receive full credit.

Note: Points shown total over 100 (consider the excess as Extra Credit)

Homework 1 (due in recitation Jan 18/20)

2.1(p.16;1pt.), 2.6(p.18;1 pt.), 2.11(p.27;2 pts.), 2.14(p.36;1 pt.), 2.15(p.36;1.5 pts.), 2.22(p.37;1.5 pts.),2.23(p.38;1 pt.)

Homework 2 (due in recitation Jan 25/27)

3.1(p.82;2.5 pts.), 3.8(p.84;1 pt.), 3.10(p.84;1 pt.), 3.11(p.84;1 pt.) 3.12(p.84;1 pt.), 3.13(p.87;2.5 pts.),3.18(p.88;1.5 pts.), 3.19(p.88;1 pt.), 3.28(p.100;1.5 pts.), 3.29(p.100;1 pt.), redo 2.11 with MINITAB(3 pts.); identify mean, median, standard deviation,and shape; do a histogram, stemplot, and boxplot of the data.

Homework 3 (due in recitation Feb 1/3)

4.3(p.123;1 pt.)[There are 56 outcomes in 4.3a], 4.4(p.123;1 pt.), 4.5(p.123;1 pt.), 4.8(p.124;2 pts.), 4.9(p.124;1 pt.), 4.11(p.132;1.5 pts.), 4.12(p.132;1 pt.), 4.18(p.133;1 pt.)

Homework 4 (due in recitation Feb 8/10)

4.25(p.141;2 pts.), 4.40(p.146;1 pt.), 4.46(p.153;2 pts.), 4.48(p.153;1 pt.), 4.49(p.153;1 pt.)

Prepare for Review 1 Feb.9 (not to be handed in) 2.13(p.36), 2.19(p.37), 3.14(p.88), 3.27(p.99), 4.86(p.173), 4.88(p.174)

Homework 5 (due in recitation Feb 22/24)

5.1(p.190;1 pt.), 5.6(p.200;1.5 pts.), 5.9(p.200;2 pts.)

Homework 6 (due in recitation Feb 29/Mar 2)

5.51(p.223;5 pts.), 5.52(p.223;3 pts.), 5.56(p.223;1.5 pts.), 5.57(p.224;1 pt.),

Homework 7 (due in recitation Mar 14/16)

6.3(p.234;1 pt.), 6.4(p.234;1 pt.), 6.8(p.239;1 pt.), 6.9(p.239;1 pt) 6.12(p.245;1.5 pts.) [First fix the typos: replace > by < and < by >] 6.13(p.246;1 pt.); Use MINITAB to do 6.1 (p.234;3 pts.).

Homework 8 (due in recitation Mar 21/23)

7.1(p.268;1 pt.), 7.2(a)(d)(p.268;1 pt.), 7.6(p.269;1 pt.), 7.7(p.269;1 pt.), 7.9(p.273;1 pt),7.12(p.273;1 pt.), 7.15(p.273;1 pt.)

To answer "State what the 95% figure means",choose from the following:

1. This interval is the result of a process that in the long run has 95% probability of being correct.
2. There is a 95% chance that the mean service time falls in this interval.
3. 95% of all service times fall in this interval.

7.16(p.273;1 pt.). Use MINITAB to do 7.1(p.268;3 pts.) [Delete the lowest and highest 10% for our trimmed mean; MINITAB's "TRMEAN" only deletes the lowest and highest 5%.] 7.22(p.276;1 pt.), 7.23(p.279;1 pt.), 7.25(p.279;1 pt.)

Prepare for Review 2 March 24 (but don't hand in) 5.3(p.191), 5.12(p.200), 5.54(p.223), 6.16(p.246), 6.17(p.246), 7.13(p.273), 7.18(p.276), 7.19(p.276)

Homework 9 (due in recitation Apr 4/6)

Use Table 4 to do 7.29(p.283;3 pts.), Table 3 for 7.30(p.284;1 pt.). 7.34(p.287;1 pt.) computing 90% confidence interval instead of 95% 7.35(p.288;1 pt.), 7.39(p.289;1 pt.); Use MINITAB to do 7.9(p.273;3 pts.) and 7.34(p.287;3 pts.) computing 90% confidence interval instead of 95%.

Homework 10 (due in recitation Apr 11/13)

8.5(p.320;1 pt.) by hand, 8.7(p.320;1 pt.), 8.8(p.324;1.5 pts.), 8.9(p.324;1 pt.), 8.12(p.329;1 pt.), 8.13(p.329;1 pt.), 8.14(p.329;1 pt.) by hand, 8.15(p.330;1 pt.), 8.16(p.330;1 pt.), 8.21(p.334;2 pts.), 8.23(p.334;1 pt.), Use MINITAB to do 8.5(p.320;3 pts.), 8.14(p.329;3 pts.)

Homework 11 (due in recitation Apr 18/20)

9.1(p.360;1 pt.), 9.2(p.361;1 pt.) [Locate the p-value for each assumption, equal variances and unequal variances.], 9.18(p.377;1 pt) 10.18(p.408;1.5 pts.), 12.9(a)(b)(p.516;1 pt.), 12.19(a)(b)(p.524;1 pt.), use MINITAB to do 12.37(p.543;4.5 pts.). Find correlation for the data in 12.9, 12.19, and 12.37 (1.5 pts.)

Prepare for Review 3 Apr.19 & 21 (but don't hand in) R10(p.112), R11(p.112), 4.78(p.172), 5.64(p.226), 7.32(p.287) 7.69(p.303),8.18(p.333), R45(p.347), R46(p.347), R47(p.348), 10.25(p.417), 12.12(p.518)

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