Answer:
Interval [16.34 , 21.43]
Step-by-step explanation:
First step. <u>Calculate the mean</u>

Second step. <u>Calculate the standard deviation</u>



As the number of data is less than 30, we must use the t-table to find the interval of confidence.
We have 6 observations, our level of confidence DF is then 6-1=5 and we want our area A to be 80% (0.08).
We must then choose t = 1.476 (see attachment)
Now, we use the formula that gives us the end points of the required interval

where n is the number of observations.
The extremes of the interval are then, rounded to the nearest hundreth, 16.34 and 21.43
The detailed explanation of the question is provided in the attached image.
Hope this helps :)
Answer:
5:6
Step-by-step explanation:
20/4=5
24/4=6
20:24 ratio simplified is 5:6
sorry if wrong
Answer:
Inequality form: x<-6
Interval Notation: (-∞, -6)
Step-by-step explanation: Isolate the variable by dividing each side by factors that do not contain the variable.
I hope this helps you out!
Answer:
8/9
Step-by-step explanation:
p(A/B) = p(A inersect B) / p(B)