The director of research and development is testing a new medicine. She wants to know if there is evidence at the 0.05 level that the medicinerelieves pain in more than 399 seconds. For a sample of 10 patients, the mean time in which the medicine relieved pain was 406 seconds with astandard deviation of 18. Assume the population distribution is approximately normal.Step 2 of 5: Find the value of the test statistic. Round your answer to three decimal places.Kenad

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Answered: The director of research and…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Find the percentage of area under a normal curve between the mean and the given number of standard deviations from the mean. This problem can be solved using technology or the table for the standard normal curve from your text. −0.4 The percentage of area under the normal curve between the mean and −0.4 standard deviations from the mean is
Suppose the exam average in a class is 55% with a standard deviation of 4. What proportion of students scored about 57%. Round two places.
You want to know the percentage of utility companies that earned revenue greater than 94 million dollars. If the mean revenue was 60 million dollars and the data has a standard deviation of 15 million, find the percentage. Assume that the distribution is normal. Round your answer to the nearest hundredth.
Beth scored 88 on a nutrition test. The class mean was 81 and the standard deviation was 3.2. What is Beth's T-score? Group of answer choices 47.8 71.9 22.4 Beth's T-score cannot be calculated. Not enough information is provided.
The annual rainfall in a town has a mean of 54.57 inches and a standard deviation of 12.84 inches. Last year there was rainfall of 71 inches. How many standard deviations away from the mean is that? Round your answer to two decimal places.
The mean height of Americans in 1776 was 67 inches with a standard deviation of 3 inches. George Washington is believed to have been 6 ft 2 inches tall, or 74 inches. Between what two heights (in inches) do 68% of the heights fall? a.61 to 70 b.61 to 73 c.64 to 70
Adult men have an average height of 69.0 inches with a standard deviation of 2.8 inches. Find the height of a man with a z-score of 0.07. Round your answer to one decimal place. inches
The heights of women follow a normal distribution with a mean height of 63.7, and a standard deviation in height of 2.9 in. What height separates the shortest 5% of women from the rest. Round your result to 1 decimal place. 68.5 inches 65.4 inches None of these 58.9 inches -1.6 inches
Mario's weekly poker winnings have a mean of $353 and a standard deviation of $67. Last week he won $185. How many standard deviations from the mean is that?
A study group takes a practice statistics exam. They find that the group has a mean score of 80 with a Standard Deviation of 5. Lily has a z-score of 1.9 and wants to know her raw score. Calculate her score. the answer is Between 89.4 and 89.6 can you please show me the work, how do I find her score?
A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?
Jerome made a grade of 89.7 on his test. The mean of the test scores was 71.4 with a standard deviation of 6.8. In what top percent can Jerome say he is, based on the tes

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