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Suppose that 4% of the 2 million high school students who take the SAT each year receive special accommodations because of documented disabilities. Consider a random sample of 35 students who have recently taken the test. (Round your probabilities to three decimal places.)
(a) What is the probability that exactly 1 received a special accommodation?
(b) What is the probability that at least 1 received a special accommodation?
(c) What is the probability that at least 2 received a special accommodation?
(d) What is the probability that the number among the 35 who received a special accommodation is within 2 standard deviations of the number you would expect to be accommodated?
(e) Suppose that a student who does not receive a special accommodation is allowed 3 hours for the exam, whereas an accommodated student is allowed 4.5 hours. What would you expect the average time allowed the 35 selected students to be? (Round your answer to two decimal places.)
A confidence interval estimate for the population mean is given to be (35.55, 44.12). If the standard deviation is 15.797 and the sample size is 37, answer each of the following: (A) Determine the maximum error of the estimate, E.
For a hypothesis test about a population proportion or mean, if the level of significance is less than the p-value, the null hypothesis is rejected.
Assume it is possible to adjust the scales in a linear manner to read Y = aX+b. How should a and b be chosen in order that Y has the same mean but fewer than 2% of the readings of Y exceed 4.2 gm.
hono golf is a manufacturer of golf products in taiwan and china. one of the golf accessories it produces at its plant
According to an IRS study, it takes a mean of 330 minutes for taxpayers to prepare, copy and electronically file a 1040 tax form. The distribution of times follows the normal distribution and the standard deviation is 80 minutes. A consumer watchd..
Develop a pie chart to summarize these contributions. Develop a bar chart to summarize these contributions and why is it appropriate to construct a bar chart for these data instead of a histogram?
A simple random sample of 120 orders will be used to estimate the porportion of first time consumers. Assume he is correct. What is the sampling distribution of p for the study?
A population consists of 15 items, 10 of which are acceptable. In a sample of 4 items, what is the probability that exactly 3 are acceptable? Assume the samples are drawn without replacement.
State the null hypothesis H 0 and the alternative hypothesis H 1 that we would use for this test. Determining null and alternative hypotheses for the height of a plant.
Explain whether the authors used a population or a sample. Explain how this could have affected the results. If a sample was used, was it representative of the entire population? Why or why not?
A local university administers a comprehensive examination to the recipients of a B.S. degree in Business Administration. A sample of 5 examinations are selected at random and scored. The test scores are 56, 85, 65, 86, and 93. At 98% confidence, ..
Conceptually we would expect the probability of newborn males and females to be the same. However, census reports indicate that the ratios of males and females in various countries do not conform to the theoretical prediction.
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