Answer:
{58.02007 , 61.97993]
Step-by-step explanation:
Data are given in the question
Sample of cars = n = 121
Average speed = sample mean = 60
Standard deviation = sd = 11
And we assume
95% confidence t-score = 1.97993
Therefore
Confidence interval is
![= [60 - \frac{1.97993 \times 11}{\sqrt{121} }] , [60 + \frac{1.97993 \times 11}{\sqrt{121} }]](https://tex.z-dn.net/?f=%3D%20%5B60%20-%20%20%5Cfrac%7B1.97993%20%5Ctimes%2011%7D%7B%5Csqrt%7B121%7D%20%7D%5D%20%2C%20%20%5B60%20%2B%20%20%5Cfrac%7B1.97993%20%5Ctimes%2011%7D%7B%5Csqrt%7B121%7D%20%7D%5D)
= {58.02007 , 61.97993]
Basically we applied the above formula to determine the confidence interval
Answer:
She has 4 pieces of pipe
Step-by-step explanation:
You have to just simply see how many 2 3/8 are in 9 1/2:
(9+1/2)/(2+3/8)=(19/2)/(19/8)=(8×19)/(2×19)=4
Answer:
D
Step-by-step explanation:
The new perimeter will be 3 times the old perimeter.
Original perimeter:
2(8+7) = 2(15) = 30 yds
New perimeter once they are tripled:
3 x 8 = 24
3 x 7 = 21
2(24+21) = 2(45) = 90 yds
30 x 3 = 90
Answer:
Moving point D does not change the measures of the inscribed angle or the central angle . It simply changes the position of the inscribed angle on the coordinate plane . My conclusion in Question 4 still hold true : the inscribed angle is half the measure of the corresponding central angle .
Step-by-step explanation:
Edmentum ( Plato ) sample answer !
