According to a report, 67.3% of murders are committed with a firearm. (a) If 100 murders are randomly selected, how many would we expect to be committed with a firearm?(b) Would it be unusual to observe 78 murders by firearm in a random sample of 100 murders? Why?---(a) We would expect [___] to be committed with a firearm.(b) Choose the correct answer below.- A. No, because 78 is less than μ - 2σ.- B. No, because 78 is greater than μ + 2σ.- C. Yes, because 78 is greater than μ + 2σ.- D. No, because 78 is between μ - 2σ and μ + 2σ.- E. Yes, because 78 is between μ - 2σ and μ + 2σ.

Answered: Image /qna-images/answer/0440404d-c145-4f96-9b16-47ea93a88552.jpg

Answered: According to a report, 67.3% of murders…

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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Sebastian throws 850 pitches, of which 782 are strikes. To a 1% level of significance, is he right in his boast that over 90% of his pitches (in general) are strikes?
2. Due to increasing fuel prices a taxi company tested a new technology that is said increase fuel efficiency. They randomly chose 12 cars and measured how many kilometers travelled per liter with and without the technology. The results were given below. Is there sufficient evidence that the technology effectively increased fuel efficiency? Use a-0.1. CAR WITHOUT WITH TECHNOLOGY TECHNOLOGY 15 18 2 16 16 3 17 18 4 17 19 17 17 6. 18 15 7 18 18 18 20 9 17 20 10 16 15 11 18 20 12 17 16 In words, define the random variable X1 = b. Но: Ha: d. The level of significance is e. Determine the test statistic using the data (show solution). f. Provide the decision rule of the test. g. Decision: h. Write a clear conclusion using the format: a. and X2 = с. A i. sufficient evidence to reject the null hypothesis that G at .
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