b) What score would an applicant need in order to be at the 90th percentile for the exam?4) Suppose New York City has an average police response time of 8.5 minutes, with a standard deviation of 3 minutes.You select a random sample of 64 calls to dispatch and calculate the response time for each. What's the probabilitythat the mean of their response times is less than 8 minutes? Include a diagram when answering this question.

Answered: Image /qna-images/answer/848c03f0-1808-4c88-a0ae-26f520aae379.jpg

Answered: Suppose New York City has an average…

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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Spinning a coin, unlike tossing it, may not give heads and tails equal probabilities. I spun a penny 275 times and got 122 heads. We wish to find how significant is this evidence against equal probabilities. a. What is the sample proportion of heads? Round to 3 decimal places. b. Heads do not make up half of the sample. Is this sample evidence that the probabilities of heads and tails are different? Take p to be the probability of getting heads in a spin of a penny. Which hypotheses do we want to test? O Họ: p = 0.5 Họ: p > 0.5 O Ho: p = 0.5 Ho: p < 0.5 O Ho: p = 0.5 Ho: p 0.5 O Ho: p 0.5 Ho: p = 0.5 c. Compute the z test statistic. Z = Round to 2 decimal places.
A population has a mean of 90 and a standard deviation of 10. A sample of 100 observations will be taken. The probability that the mean from that sample will be less than 92 is
A study found that student weights averaged 87.3lb with a SD = 4lb. What is the 2-decimal % probability that an individual student will weight below 85 lb? What is the 2-decimal % probability that a group of 35 students will have a mean weight of over 88 lb?
Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the standard deviation is 5. What is the probability of selecting a person with a score greater than Cody’s?
A study found that there was 48% chance that the driver fails a breathalyzer test when it is administered on a Friday night. The test is administered to 80 drivers. What distribution that can be used to model the above situation. How many drivers do we expect to fail the test
You have a uniform distribution whose lowest value is 7 and whose highest value is 15. Find the probability that a randomly selected number from this distribution will be between 9.3 and 10.6.
A quiz consists of 40 multiple choice questions, each with five possible answers, only one of which is correct. If a student guesses on each question, what is the mean and standard deviation of the number of correct answers? Round to the nearest thousandth.
Write the formulae 60% of all the students passed an exam. If a random sample of 10 students is selected, What is the mean and the standard deviation ?
The NJ Department of Health has reported the average life span of NJ residents is 81 years. If the standard deviation is σ = 4 years, what is the probability of a person living to at least 92 years of age?
If the standard deviation of a sample is 4.3 for 28 data values, what would the standard deviation be for the population from which the sample was drawn?
The distances golf balls travel under laboratory testing conditions are normally distributed. The mean is 312 yards. The probability the golf ball travels further than 319 yards is 0.28. Find the probability a randomly selected golf ball travels between 305 yards and 319 yards. Express the answer as a decimal value rounded to the nearest hundredth.

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