What two expressions that are equivalent to: (-4n+2/7m)-(3 5/7m-n)
1 answer:
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Answer:
The 95% confidence interval for the mean score is:
∈
Step-by-step explanation:
We want to estimate the population mean, that is, the average score of all the subjects.
An estimator for the population mean μ is
Since the sample size is then we use the statistic
with
degrees of freedom
The confidence interval for the mean is:
Where
is the average score of the sample
is the standard deviation of the sample
is the sample size
for a confidence level of 95% and 26 degrees of freedom
Then confidence interval is
∈
Answer:
The expression represents the price you paid per gallon is:
- Price paid per gallon =
Step-by-step explanation:
To identify the expression is right, I'll show you with an example: suppose that you paid $56 buying 7 gallons of gas, now you can replace those values in the expression I gave you:
- Price paid per gallon =
- Price paid per gallon =
- Price paid per gallon = 8
And you can check this value by multiplying the price paid by the gallon and the number of gallons, which you obtain the number of dollars you spent:
- <u>Number of dollars (d) = 8 * $7 = $56 </u>