Question 449012: For questions 1–3 calculate the mean, range, and standard deviation for each set of data.
1. 64, 68, 71, 67, 72, 62, 71
about 67.9; 10; about 3.5
about 55.7; 10; about 4.7
about 67.9; 9; about 2.5
about 47.6; 10; about 3.5
2. 5, 8, 12, 15, 17, 12, 14, 7
about 12.4; 12; about 2.7
about 11.3; 16; about 3.9
about 11.3; 12; about 3.9
about 12.4; 16; about 3.9
3. 10, 8, 13, 9, 11, 15, 7
about 10.4; 8; about 2.6
about 11.2; 7; about 3.4
about 9.8; 8; about 3.0
about 10.4; 9; about 6.7
4. A set of values has a mean of 250 and a standard deviation of 50. What value has a z-score of –2.4?
In a poll of 650 randomly selected high school seniors, 475 plan to attend college for at least 2 years.
5. Find the sample proportion.
about 52%
about 73%
about 87%
about 64%
6. Find the margin of error.
7.Determine the sample size that produces a margin of error of postive or negative 6%.
about 322
about 478
about 156
about 278
8. In the rainforest you are visiting, there is a 50% chance of rain each day. Find the probability of rain on all of the next 4 days.
Each trial of an experiment has a probability of success p. Find the probability of x successes in n trials.
9. p = 0.3, x = 4, n = 6
(1 point)
about 4.67%
about 5.95%
about 12.2%
about 2.4%
10. p = 0.9, x = 5, n = 7
about 10.2%
about 7.9%
about 12.4%
about 6.7%
Answer by TheDoctor(14)   (Show Source):
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The answers for questions 1 - 3 are as follows:
1. about 67.9; 10; about 3.5
2. about 11.3; 12; about 3.9
3. about 10.4; 8; about 2.6
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