
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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- Homework #6arrow_forwardPRACTICE ANOTHER Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as the first nonzero digit disproportionately often. In fact, research has shown that if you randomly draw a number from a very large data file, the probability of getting a number with "1" as the leading digit is about 0.301. Now suppose you are the auditor for a very large corporation. The revenue file contains millions of numbers in a large computer data bank. You draw a random sample of n = 225 numbers from this file and r = 85 have a first nonzero digit of 1. Let p represent the population proportion of all numbers in the computer file that have a leading digit of 1. What is the value of the sample test statistic? (Round your answer to two decimal places.) ANSWER IS NOT 2.57 Find the P-value of the test statistic. (Round your answer to four decimal places.) ANSWER IS NOT 0.0102arrow_forwardNumber 1arrow_forward
- ELEVEN The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an average (mean) of 1.8 pounds with a standard deviation of 1.02 pounds. In a recent study, a group of a a 60 people who used this pill were interviewed. The study revealed that these people lost a mean of 1.73 pounds after one week. If the producer's claim is correct, what is the probability that the mean weight loss after one week on this pill a for a random sample of 60 individuals will be 1.73 pounds or less? Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.arrow_forwardMonthly Mortgage Payments The average monthly mortgage payment including principal and interest is $982 in the United States. Assume that the standard deviation is approximately $180 and the mortgage payments are approximately normally distributed. Find these probabilities of the monthly payment selected randomly. Enter the final answers as decimals rounded to at least four places. Round intermediate z -value calculations to two decimal places. (a) More than $1220 P(X.1220)= (b) Between $790 and $1150 P(790<X<1150)=arrow_forward14??arrow_forward
- Use the given information to find the number of degrees of freedom, the critical value XL2 and XR2, and the confidence interval estimate of o. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Nicotine in menthol cigarettes 90% confidence; n=26 , s = 0.28 mg df= _ ( type a whole number ) X2L= _ ( round to three decimal places as needed ). X2R = _ ( round to three decimal places as needed ). The confidence interval estimate of o is _mg < o < _ mg ( round to two decimal places as needed )arrow_forwardSampling an Infinite Population 4. The life expectancy in the United States is 75 with a standard deviation of 7 years. A random sample of 49 individuals is selected. What is the probability that the sample mean will be larger than 77 years? What is the probability that the sample mean will be less than 72.7 years? What is the probability that the sample mean will be between 73.5 and 76 years?.arrow_forward73. Complete the PDF and answer the questions. x P(x) xP(x) 0 0.3 1 0.2 2 3 0.4 Table 4.31 Find the probability that x = 2. Find the expected value.arrow_forward
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