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777dan777 [17]
2 years ago
7

Fuel economy estimates for automobilos built in a certain yoar predicted a mean of 26.8 mpg and a standard deviation of 72 mpg f

or highway driving. Assume that a normal distribution can be applied. Within what
range are 99.8% of the automobiles?
Mathematics
1 answer:
kodGreya [7K]2 years ago
4 0

Answer:

range=u ± 3.09 sd

Step-by-step explanation:

Given:

mean, u= 26.8 mpg

standard deviation, sd=72 mpg

% contained in interval = 99.8%

the interval for 99.8% of the values of a normal distribution is given by

mean ± 3.09 standard deviation= u ± 3.09 sd

                                                      =26.8  ± 3.09(72)

                                                      =26.8 ± 222.48

                                                      = 249.28 , -195.68

range=u ± 3.09 sd = 249.28 , -195.68 !

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For a process, the average range for all samples was 5 and the process average was 25. If the sample size was 10, calculate UCL
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Step-by-step explanation:

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2 years ago
The population of a certain city was 112,000 in 1998, and the observed relative growth rate is 4% per year. (a) Find a function
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Answer:

See Explanation

Step-by-step explanation:

Now;

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P=Poe^kt

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Here is a growing pattern of squares:
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Step-by-step explanation:

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1 year ago
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