You are 300 miles from home and you are driving toward home at an average of 55mph. Write an equation to represent the situation
and find the domain and range of the function.
1 answer:
Both time and distance start at zero. The distance traveled goes from 0 to 300
The time goes from 300/55 = 5.4545
The direct constant of proportionality = 55
The equation is set up so that d = r * t
So the domain is t and it goes from 0 ≤ t ≤ 5.4545
The range is the distance. It goes from 0 ≤ d ≤ 300
See the graph below.
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Answer:
Step-by-step explanation:
Previous concepts
A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".
The margin of error is the range of values below and above the sample statistic in a confidence interval.
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
represent the sample mean for the sample
population mean (variable of interest)
s=5 represent the sample standard deviation
n=15 represent the sample size
Solution to the problem
In order to calculate the critical value we need to find first the degrees of freedom, given by:
Since the Confidence is 0.90 or 90%, the value of and
, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,14)".And we see that
The margin of error is given by this formula:
And if we replace the values we got: