The 2017 Chapman University Survey of American Fears asked a random sample of 1207 American aduts they believed that alens had come to Earth in modemtimes, and 20% responded yes. Complete parts (a) through (d) belowa What es the standard emor tor ths estmate of the peroentage ot a Amencans who Deeve that aens have come to tam n mooern smes?Round to four decimal places as needed.)b. Find a 90% confidence interval for the proportion of all Americans who believe that alens have come to Earth in modem time(Round to two decimal places as needed.)c. What is the margin of error for the 0% confidence intervalS (Round to two decimal places as needed)d Suppose that a similar poll conducted in 2016 found that 24.3% of Americans believed alens have come to Earth in modem imes. Baned on your cortdenceinterval, can you conclude that the proportion of Americans who believe this has increased sinoe 20107OA. The interval does not support this claim. This is because 24.3% is not in the interval, and al values are above 24.% d. Suppose that a similar pol conducted in 2016 found that 24.3% of Americans beleved aliens have come to Earth in modern times. Based on your confidenceinterval, can you condude that the proportion of Americans who believe this has increased since 20167OA. The interval does not support this claim. This is because 24.3% is not in the interval, and all values are above 243OB. The interval supports this claim. This in because 24 3% is not in the interval, and all values are above 24.%OC. The interval does not support this claim This is because 24 3% is in the interval.OD. The interval supports this claim This is because 24,3% is in the interval

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Answered: times, and 20% responded yes. Complete…

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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The following is a list of 14 measurements. -1, -38, -59, -12, −5, −77, −42, −50, −68, −62, −82, −9, −80, 42 Send data to calculator Suppose that these 14 measurements are respectively labeled x₁, x2, X₁4. (Thus, −1 is labeled x₁, -38 is labeled .x₂, and so on.) Compute the following. 14 Σ (*; -48) i=1 0 X
A scale is known to be "low-calibrated" in that it measures an aluminum bar to be 4 grams lower than the actual weight. If ????μold is the mean of all possible measurements of the bar using the old calibration, and ????μnew is the mean of all possible measurements of the bar using a re-calibrated scale. It is desired that ????−????=4μnew−μold=4. Consider the test ?0:????−????=4H0:μnew−μold=4 vs. ?0:????−????≠4H0:μnew−μold≠4 Sample after calibration: mean is 95.8 , SD is 4.9 and sample size is 10 Sample before calibration: mean is 89.352 , SD is 4.2 and sample size is 62 We do not know population standard deviations. What is the p-value? (Hint: best to use software, or else the Desmos Calculator for the 2 sample T and Z test)
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During one shift, the express lane clerk recorded how many times customers violated the "10 items or less" rule for his lane. In particular, he recorded how many items over the limit each violator placed on the conveyor belt. This data is summarized in the histogram below. NOTE: The last class actually represents "7 or more items," not just 7 items. What is the frequency of times the limit was exceeded by at most 5 items?Answer: times
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Suppose the lengths of human pregnancies are normally distributed with µ = 266 days and o= 16 days. Complete parts (a) and (b) below. (Type integers or decimals.) A. The proportion of human pregnancies that last less than B. The proportion of human pregnancies that last more than days is days is Provide a second interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals.) O A. The probability that a randomly selected human pregnancy lasts less than B. The probability that a randomly selected human pregnancy lasts more than (b) The figure to the right represents the normal curve with µ = 266 days and o = 16 days. The area between x = 280 and x = 295 is 0.1558. Provide two interpretations of this area. days is days is Provide one interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or…
Two varieties of corn are grown in 4 different locations. Each location provides a value in pounds for each variety.The table below lists the results. Find the standard error for the difference in the production of the two corn varieties to two decimal places. Variety 1 Variety 2 difference location 1 32.1 34.5 -2.4 location 2 30.6 32.6 -2.0 location 3 33.7 34.6 -0.9 location 4 29.7 31.6 -1.3 mean value 31.53 33.18 -1.65 standard deviation 1.76 1.72 0.68 1.23 0.75 0.34 0.98

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