In: Statistics and Probability
In a series of 100 tosses of a token, the proportion of heads was found to be 0.58. However, the margin of error for the estimate on the proportion of heads in all tosses was too big. Suppose you want an estimate that is in error by no more than 0.04 at the 95% confidence level. (a) What is the minimum number of tosses required to obtain this type of accuracy? Use the prior sample proportion in your calculation. You should toss the token at least times. (b) What is the minimum number of tosses required to obtain this type of accuracy when you assume no prior knowledge of the sample proportion? You should toss the token at least times.
In: Statistics and Probability
What is the structure of the IRS Tax Code in 100 words?
In: Accounting
In: Operations Management
For the following, the data set has a mean of ? = 100 and a standard deviation of ? = 20. Find the following areas under the curve for the region that is:
1) Less than 100
2) Greater than 160
For the following, scores on a psychology exam were normally distributed with a mean of 67 and a standard deviation of 8. Find the following:
1) What percentage of scores were below 83?
2) If 500 students took the exam, approximately how many students scored below 75?
In: Statistics and Probability
In: Economics
1. A variable is normally distributed in the population with a mean of 100 and a standard deviation of 10. A sample of 20 is randomly selected. The probability that the sample mean is between 90 and 110 is _______ the probability that the variable is between 90 and 110.
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greater than |
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less than |
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equal to |
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not comparable with 2.the general manager of a logistic consulting group believes that 28% of the firm's orders come from new customers. A simple random sample of 120 orders was selected. Using the manager's belief, determine:
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In: Math
In: Economics
In: Operations Management
What are the boundaries of Europe and why ? (answer in 100 words)
In: Economics