March 2011
Intermediate to advanced
829 pages
25h 44m
English
Content preview from Technical Mathematics, Sixth Edition
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21.9. CHAPTER 21 REVIEW PROBLEMS
Label each type of data as continuous, discrete, or categorical.
The life of certain radios. Continuous
The number of houses sold each day. Discrete
The colors of the cars at a certain dealership. Categorical
The sales figures for a certain product for the years 1970–80 are as follows:
4.
Year Number Sold 1970 1344 1971 1739 1972 2354 1973 2958 1974 3153 1975 3857 1976 3245 1977 4736 1978 4158 1979 5545 1980 6493 Make an x-y graph of the sales versus the year.
Make a bar graph for the data of problem 4.
If we toss three coins, what is the probability of getting one head and two tails? 3/8
5.
If we throw two dice, what chance is there that their sum is 8? 5/36
A die is rolled twice. What is the probability that both rolls will give a two? 1/36
At a certain factory, 72% of the workers have brown hair, 6% are left-handed, and 3% both have brown hair and are left-handed. What is the probability that a worker chosen at random will either have brown hair or be left-handed, or both? 0.75
What is the probability of tossing a five or a nine when two dice are tossed? 2/9
Find the area under the normal curve between the mean and 0.5 standard deviation to one side of the mean. 0.1915
Find the area under the normal curve between 1.1 standard deviations on both sides of the mean. 0.7286
Find the area ...
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