The margin of error can be calculated using the t
statistic. The formula for margin of error is given as:
<span>Margin of error = t * s / sqrt (n) ---> 1</span>
Where,
t = the t score based on the given confidence level and
degrees of freedom
n = number of samples = 21
s = standard deviation = 7.1
Degrees of freedom = n – 1 = 21 – 1 = 20
Based on the standard probability tables for t, the t
score is:
t = 0.860
Substituting into equation 1:
margin of error = 0.860 * 7.1 / sqrt (21)
margin of error = 1.33
The range is:
range = 30.1 ± 1.33
range = 28.77, 31.43
Therefore the commute time to work is between 28.77 minutes
and 31.43 minutes.
The winning time is 59.625 because it is the shortest and therefore fastest.
Answer: the answer is the first one. I just took the quiz.
Step-by-step explanation:
Answer:
find the product of (4m-n)and(3m-2n)
Answer:
<u>76800</u>
Step-by-step explanation:
We have to first multiply the area by the population density per kilometer.
Area = l * w
= 20 x 12
= 240
so the population is equal to 240 x 320 = 76800
<u><em>Please mark as brainliest. Thank you</em></u>