Mathematics, 27.09.2019 02:30, kayleemiller5669
Question suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 5656 hours and a standard deviation of 3.33.3 hours. with this information, answer the following questions. (a) what proportion of light bulbs will last more than 6262 hours? (b) what proportion of light bulbs will last 5252 hours or less? (c) what proportion of light bulbs will last between 5858 and 6262 hours? (d) what is the probability that a randomly selected light bulb lasts less than 4646 hours? (a) the proportion of light bulbs that last more than 6262 hours is
Answers: 3
Mathematics, 20.06.2019 18:04, 8236
Fran would like to estimate the mean amount of time it takes people in her town to travel to work. the town's population is 150,000 and about 90,000 of those are working adults. which statements are true? select each correct answer. there is no way to infer the value of the mean. she must collect data for all 90,000 working adults and calculate the mean. a larger sample of working adults will provide a better estimate of the true mean than a smaller sample. the population of working adults is too large for using a sample to estimate the mean of the entire group. if she takes a random sample of the population of working adults in her town, the mean for that group is likely close to the mean for the entire group.
Answers: 2
Mathematics, 21.06.2019 14:00, janetshirinyan
Which of the following is the missing term, a2, of the geometric sequence in which a1=2 and a3=200
Answers: 2
Mathematics, 21.06.2019 15:00, yyyyyyyyy8938
Sienna planned a trapezoid-shaped garden, as shown in the drawing below. she decides to change the length of the top of the trapezoid-shaped garden from 32 ft to 24 ft. which expression finds the change in the scale factor?
Answers: 1
Question suppose that the lifetimes of light bulbs are approximately normally distributed, with a m...
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