Complete Question
The complete question is shown on the first uploaded image
Answer:
Value x of X -3 -7 -15
Step-by-step explanation:
From the question we are told that
The values of X are
The total number of outcomes is n = 8
The probability distribution function of X is evaluated as follow
Where is the number of time X = -3 occurred and from the table the value is
Therefore
Now
Where from table
So
Also
<u>Answer:</u>
<em>0.26</em>
<u>Step-by-step explanation:</u>
<em>This is a Isosceles triangle so every side is 60</em>
<em>equation= 60x+60+60x=92</em>
<em>60x+60x=120x</em>
<em>120x+60=92</em>
<em>60-60=0</em>
<em>92-60=32</em>
<em>120x=32</em>
<em>32/120=0.26</em>
Answer:
Ettienes error was in step 2 .
Step-by-step explanation:
Khan academy
Answer: D
Step-by-step explanation:
Answer:
95% confidence interval for the population variance is (2.89, 5.11)
Step-by-step explanation:
Confidence Interval (CI) = variance + or - (t×s)/√n
Standard deviation (s) = 2, variance (s^2) = 2^2 = 4, n = 15, degree of freedom = n - 1 = 15 - 1 = 14
t-value corresponding to 14 degrees of freedom and 95% confidence interval is 2.145
Lower bound = variance - (t×s)/√n = 4 - (2.145×2)/√15 = 4 - 1.11 = 2.89
Upper bound = variance + (t×s)/√n = 4 + (2.145×2)/√15 = 4 + 1.11 = 5.11
95% confidence interval is (2.89, 5.11)