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1. The net profit of an investment is normally distributed with a mean of $10,000 and a standard deviation of $5,000. The probability that the investor's net profit will be between $12,000 and $15,000 is _____________.
a) 0.8413
b) 0.1859
c) 0.4967
d) 0.3413
2. When the rod shearing process at Stockton Steel is "in control" it produces rods with a mean length of 120 inches. Periodically, quality control inspectors select a random sample of 36 rods. If the mean length of sampled rods is too long or too short, the shearing process is shut down. Sarah Shum, Director of Quality Programs, chose a 0.05 level of significance for this test. The critical z values are _________.
a) -1.75 and 1.75
b) -1.96 and 1.96
c) -1.645 and 1.645
d) -2.33 and 2.33
Utilize this information to construct a probability table, and then calculate each of the given probabilities:P (female and domestic car).
Compare the percentage found in b) to percentage given by Empirical Rule and Chebyshev's Rule. (Make a table 3 x 3).
Evolutionary theories often, Emphasize that humans have adapted to their physical environment. One such theory hypothesis that:
In a study of the consumer's view of the economy, the probability that a consumer would buy a house during the year was 0.0013, and the probability that the consumer would buy a car during the year was 0.198. There was also a 0.0100 probability t..
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Determine the distributions given below represent a probability distribution. Justify your answer.
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Why is the F distribution important? How do you determine if a significant difference exists among the groups in ANOVA? How do you determine differences between the groups in ANOVA?
Suppose the sample variance for 30 parts turns out to be s 2 = .0005. Use α = .05 to test whether the population variance specification is being violated.
Take a confidence interval for the difference in the average of renting between the first andthird hotel.
A plus four 95% confidence interval for the difference between the two population proportions of wrist injuries is: A. 0.2909 ± 0.1674. B. 0.2909 ± 0.1069. C. 0.2909 ± 0.0907. D. 0.2909 ± 0.1275
If the Pearson Correlation is 0.18, what do we get, what is the value called, and what does it tell us?
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