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You have arrived!!!
These questions lead to the last hidden box!
Solve the following 3 problems:
1. |
A normal distribution of values has a mean of 47 and a standard deviation of 3.2. Which of the numbered choices is the percentage of values that lie between 42 and 50 ?
1) 17.4% 2) 59.1% 3) 76.7% 4) 82.4% |
| 2. |
A sampling distribution used to estimate a population proportion, p, yielded a value of 0.25. Which of the numbered choices is the margin of error that corresponds to a sample size of 600 and a confidence level of 95%?
1) 0.35 2) 0.035 3) 0.043 4) 0.43
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| 3. |
The average growth rate of 12 trees are given in the table. The trees were all 6 ft. tall when planted. Determine a logarithmic regression equation for the growth of the trees. Using the regression equation, which of the numbered choices is the age of the trees (to the nearest tenth) when the average height was 10 feet?
1) 1.4 yrs 2) 1.6 yrs
3) 1.9 yrs 4) 2.3 yrs
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Age in years |
Height
in feet |
1 |
6 |
2 |
9.5 |
3 |
13 |
4 |
15 |
5 |
16.5 |
6 |
17.5 |
7 |
18.5 |
8 |
19 |
9 |
19.5 |
10 |
19.7 |
11 |
19.8 |
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Read carefully!!
Find the sum of the cubes of each of the answers. Cube this result.
Place this answer in the address below (following the capital letters "AA"), type the URL address into your browser, and you will find the next hidden box.
http://mathbits.com/caching/AA__________.html
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