The life, in years, of a certain type of electrical switch has an exponential distribution with an average life ß = 2. If 400 of these switches are installed in different systems, what is the probability that at most 145 fail during the first year?
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A: The objective of this question is to find the probability that at most 145 out of 400 switches fail…
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- There are 20 total people that took this survey and 2 people that are older than 70 years old. What percentage of people surveyed are older than 70 years old? 5.0- 4.0- 3.0- 2.0- There are 20 total people that took this survey and people that are younger than 50. What people surveyed are younger than 50 years old? ntage of 1.0- .0- 20 30 40 50 60 70 80 90 100 Age DELL Frequency25/8 -17/8. over. 23/10-13/10is it p=value is suppose to be 0.0401 not 0.0395 to according z-table of -1.75
- Male Female Total Very happy 324 420 744 Pretty happy 612 776 1388 Not too happy 159 168 327 Total 1095 1364 2459 **Report all numbers to two decimal places** Based on these data. 1. (True/False). A randomly selected respondent is most likely to be very happy. 2. There is a percent chance that a randomly selected respondent is very happy. 3. % of males reported being not too happy. 4. (True/False). Over 10% of females reported being not too happy. 5. There is a percent chance that a randomly selected respondent is not too happy. 6. (True/False). A randomly selected respondent is least likely to be pretty happy.llustration 11. From the following data of the wages of 7 workers, compute the' median wage: TOA.27 17,120 ST3.07 Wages (in Rs.) 14,100 14,150 16,080 15,200 16,160 17,4004. A doctor wants to estimate tle mean Cholestenl level of the people living in a nural area -7he ductor takes a random sample and tests their cholestonol level. Here are the resultss 215,176,254, 207,198.76.143.123. 187,234,236,192, 213 207, 216 ,290,169, 190,156,140.230,215, 205,208, 185,305 1. what is the 95*h percentile ? 2. It te averoge dcholosterol level should be 1 95 ,what should this doctor do?
- 11. Assume that the probability of an individual coal minor being killed 1 in a mine accident during a year is Use appropriate statistical 2400 distribution to calculate the probability that in a mine employing 200 miners, there will be at least one fatal accident every year. [Ans.: 0.07]Chebyshev's Theorem states that for any set of numbers, the fraction that will lie within k standard deviations of the mean is at least 1−1/k2. Use this theorem to find the fraction of all the numbers of a data set that must lie within 2 standard deviations from the mean. At least ? of all numbers must lie within 2 standard deviations from the mean. (type a fraction)n 10 of 16 > Here is a stemplot of the areas of the 46 counties in South Carolina. Note that the data have been rounded to the nearest What is the area of the largest South Carolina county? 10 square miles (mi?). O 655 square miles 3 9999 4 0116689 501115566778 6 47899 7 01245579 8 0011 13 10 8 11 390 square miles 122 square miles O 12.2 square miles O 1,220 square miles Key: 64 represents a county with an area of 635 to 644.99 9. 233 12 2 square miles.
- what is type 2 errorestnavclient.psonsvc.net/#/question/1429fac6-f27b-4c12-86d0-e9ffb3f15887/d5138119-f806-4fd4-bd04-cbe9aa7c6acc Review - A Bookmark Paiz Guevar S Math 1 Unit 3 Test 2020 / 3 of 11 II Paus If B is the midpoint of AC, with point A at (5, 2) and point C at (9, 0), what is the equation of the line perpendicular to AC that passes through B? O A. y=-½x- 13 O B. y= 2x– 13 O C. y=-½ x + 5 O D. y = 2x + 5 čms USTwo popular brands of tires for tractor-trailers are the Puma and the ? Eternal. Ann is a buyer for a major shipping company and wants to determine if there is any difference between the two brands of tire in th mean distance (in thousands of km) driven on them before they need to be replaced. E In the company's testing lab, Ann tests a random sample of 14 Puma tires and a random sample of 15 Eternal tires. (These samples are chose independently.) For the Puma tires, the sample mean distance (in thousands of km) until they would need be replaced is 54.71 with a sample variance of 5.95. For the Eternal tires, the sample mean distance (in km) until they would need to be replaced is 50.21 with a sample variance of 37.75. Assume that the two populations of distances driven are approximately normally distributed. Can Ann conclude, at the 0.05 level of significance, that there is a difference between the population mean of the distances (in thousands of km) driven on Puma tires before they…