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.
There is a formula to use for this kind of problem (what is A given B).
P(A | B) = [P (B ∩ A)] /P(B) which says the probability of A given B equals the probability of B and A over the probability of B. So if you make baseball A and basketball B you can plug them into the equation:
P(A | B) = 0.04/ 0.15
When you solve I think you should get 27%
Answer:
at least 9 students in each cohort.
Step-by-step explanation:
Given that :
In a class, there are 25 students and each of them is either a sophomore, a freshman or a junior. We have to determine the number students in the same cohort.
Let us suppose there are equal number of students in each of the cohort.
Now let us assume that the number of the students in each cohort be 8, i.e. each as a freshman, a junior or a sophomore. Therefore, the total number in the all the cohorts will be 24 students only.
Thus, we can say that there are at least freshman, at least sophomore or at least junior in each of the cohort.
Step-by-step explanation:
6th Term = 8C5 * (5x)³ * (2)⁵ = 224,000x³.
Hence the coefficient is 224,000.