University and college students average 7.2 hours of sleep per night, with a standarddeviation of 40 minutes. If the amount of sleep is normally distributed, whatproportion of university and college students sleep for more than 8 hours?a) 0.115b) 0.215c) None of the answers are correctd) 0.515e) 0.315

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Answered: Iniversity and college students 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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2. An airplane leaves Richmond on a Monday morning carrying 263 passengers to New York City. On Tuesday morning, there are 154 passengers flying from Richmond to New York City. Which is closest to the percent decrease in the number of passengers? 1 point O A) 41% B) 71% C) 59% O D) 65%
A= 90-100 B= 89-80 C= 79-70 Failing= 59-0
Daily temperatures during the month of July is dist degrees. According to Chebyshev's Theorem: At least what percent of the days during the month of July is the daily temperature betweer 69.6 degrees and 86.4 degrees? а.
how to solve
4.) The population 2005 was 3.7 ilion. what is the Q-year gouertn Irelond is o.2 million. he popalation in
3) You measure the length of 5 radish seedlings at 7 days and 10 days and get the following results in mm (do NOT use R except for part (d)): seedling #: 1 2 3 4 S 5 days: 30 20 38 49 32 33.8 10.686 7 days: 35 27 46 58 34 40 12.145 difference: -5 -7 -8 -9 -2 -6.2 2.775 (a) Is there a difference in length? (Note: this should be one-sided. Why??) (b) Repeat (a), but now use a regular (unpaired) t-test. (c) What happened in (b)? (d) Verify the normal distribution assumption for the paired t-test you did in (a). (You may use R for this part).
Cattle, finis Consider the Angus weights modelN(1152, 84) one last time.a) What weight represents the 40th percentile?b) What weight represents the 99th percentile?c) What’s the IQR of the weights of these Angus steers?
Time left 0:4 From January to September, the mean number of car accidents per month was 630. From October to December, the mean was 1350 accidents per month. of The mean number of car accidents per month for the whole year was: a) 720 b) 675 c) 690 d) 810 e) 630
A survey of 10 students was conducted to investigate the amount of time they spend on social media each day. Students were given a timer and asked to record the number of minutes spent every time they accessed social media. The students' total times for one day are given below (in minutes).45 57 63 79 84 92 99 105 117 145 A student who was not included in the survey recorded a time of 240 minutes on social media. That value is: a. clearly an erroneous recording. b. inconsistent with these data. c. consistent with these data. d. an outlier. A group of veterinary researchers plans a study to estimate the average number of enteroliths in horses suffering from them. Previous research has shown the variability in the number to be = 2. The researchers wish the margin of error to be no larger than 0.5 for a 99% confidence interval. To obtain such a margin of error, the researchers need at least:…
#6) You use 2,500 incandescent holiday lights to decorate your apartment in Huntington. When turned on, the combined power of those lights is 1200 Watts. The electricity cost around is 6.40 cents per kilo- Watt-hour. How much is the total cost of electricity for the lights if you operate the 2,500 incandescent holiday lights for 24 hours per days for 50 days? Report your answer with the proper number of sig figs and rounding. Show all conversions. Express answer to 3 sig figs. Report answer in dollars.
60% of students entering four-year colleges receive a degree within six years. Is this percent smaller than for students who play intramural sports? 128 of the 220 students who played intramural sports received a degree within six years. What type of test should you use? A) z-test for population mean B) z-test for population proportion C) t-test for population mean
More cattle Based on the model N(1152, 84) describingAngus steer weights, what are the cutoff values fora) the highest 10% of the weights?b) the lowest 20% of the weights?c) the middle 40% of the weights?

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