Mathematics, 12.11.2020 18:50 zainababbas25
In a sample of 80 light bulbs, the mean lifetime was 1217 hours with a standard deviation of 52 hours. a. Find the 95% confidence interval for the mean lifetime of this type of bulb. Justify the reason you chose the distribution used to construct the confidence interval. b. How many light bulbs must be sampled so that a 95% confidence interval will specify the mean lifetime to within + 8 hours?
Answers: 3
Mathematics, 21.06.2019 23:20
8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?
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Mathematics, 21.06.2019 23:30
The average daily maximum temperature for laura’s hometown can be modeled by the function f(x)=4.5sin(πx/6)+11.8 , where f(x) is the temperature in °c and x is the month. x = 0 corresponds to january.what is the average daily maximum temperature in may? round to the nearest tenth of a degree if needed.use 3.14 for π .
Answers: 1
Mathematics, 22.06.2019 01:00
5. write an equation for the line that is parallel to the given line and that passes through the given point. y = –5x + 3; (–6, 3)
Answers: 2
In a sample of 80 light bulbs, the mean lifetime was 1217 hours with a standard deviation of 52 hour...
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