In this
problem, the given values are:
x = average =
30.4
s = standard
deviation = 7.1
n = number of
samples = 25
Degrees of
freedom = n -1 =24
Using the
t-distribution table for a normal curve at 90% CI, we get t-crit:
t-crit = 1.711
Now the Margin
of Error (E) is calculated as:
E = t-crit*(s/ 
)
By substituting the known values into the equation:
E = 1.711 * (7.1/ 
)
E = +- 4.30
Therefore, the margin of error is 4.36. Hence, the commute time
is between 26.1 minutes and 34.7 minutes.
<span> </span>
First find out how much in that one week, the amount of miles per gallon
125/5 = 25, or 25 mpg
Find out how much for the next week
175/7 = 25, or 25 mpg
Note:
g = gallons
m = miles
you're equation will be:
m = 25(g)
For every gallon (g), you multiply it by 25 to get miles (m).
hope this helps
Answer : 10
on Tuesday she earned $35 and on Friday she spent $25 you subtract them because “difference” is subtract.
Answer:
Below
Step-by-step explanation:
Sale price of each tire : $92.99 - $20 = 72.99. The cost of x tires is 72.99x
If the sales tax is 4% there is an additional (72.99x)(1.04)
Here is the equation
= (72.99)(1.04) t
If Patrick bought 8 tires.....
= (72.99)(1.04)(8)
= $607.2768
Hope this helps!
