Mathematics, 11.03.2020 22:20 chocolate4550
The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 4.5 years and a standard deviation of 0.5 years. He then randomly selects records on 48 laptops sold in the past and finds that the mean replacement time is 4.3 years. Assuming that the laptop replacment times have a mean of 4.5 years and a standard deviation of 0.5 years, find the probability that 48 randomly selected laptops will have a mean replacment time of 4.3 years or less. P(x-bar < 4.3 years)
Answers: 1
Mathematics, 21.06.2019 14:20
Micah solves a linear equation and concludes that x = 0 is the solution. his work is shown below. (1 โ 3x) = 4(โ + 2) 0 = x which statement is true about micahโs solution?
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Mathematics, 21.06.2019 17:20
Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?
Answers: 3
Mathematics, 21.06.2019 18:00
Write the equation for the parabola that has xโ intercepts (โ2,0) and (4,0) and yโ intercept (0,4).
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Mathematics, 21.06.2019 19:30
The revenue each season from tickets at the theme park is represented by t(c)=5x. the cost to pay the employees each season is represented by r(x)=(1.5)^x. examine the graph of the combined function for total profit and estimate the profit after four seasons
Answers: 3
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