X~N(-1,4). Find C so that Prob(miu - C < X <= miu + C) = 0.99 NOTE: WRITE YOUR ANSWER WITH 4 DECIMAL DIGITS. DO NOT ROUND UP OR DOWN. |
X~U[-2,4] Find Xc so that Prob(X>Xc) = 0.85 NOTE: USE 4 DECIMAL DIGITS.
Find the critical value tc for the confidence level c = 0.99 and sample size n = 8. Find tc. Round to three decimal places as needed.
Find the critical value tc for the confidence level c = 0.99 and sample size n = 8. Find tc. Round to three decimal places as needed.
8. Find the critical t values for the following: (Section 6.2) • C=0.99 and n =10 C=0.95 and n =16 • c=0.80 and n =250 c=0.98 and n =95 Note: If you cannot find the degrees of freedom (df) on the t-distribution chart, use the lower df.
QUESTION 9 It is known that the variance of a population equals 1444. A random sample of 100 observations is going to be taken from the population. Compute the margin of error corresponding to a 96% level of confidence. NOTE: WRITE YOUR ANSWER WITH 4 DECIMAL DIGITS. DO NOT ROUND UP OR DOWN. QUESTION 12 The average score of a sample of 100 senior business majors at UTC who took the Graduate Management Admission Test was 530 with a variance...
If X ~N(µ=0,ơ=1), determine: (a) Prob(X<-1.96)? (b) Prob(X> 1.96)? (c) Prob(-1.96<X< 1.96)
QUESTION 10 1. It is known that the standard deviation of a population equals 30. A random sample of 85 observations is going to be taken from the population. Compute the margin of error corresponding to a 99% level of confidence. NOTE: WRITE YOUR ANSWER WITH 4 DECIMAL DIGITS. DO NOT ROUND UP OR DOWN. QUESTION 11 The average score of a sample of 50 senior business majors at UTC who took the Graduate Management Admission Test was 510 with...
please explain this qustion. Let X ∼N(1,4) and g(t) = P(X > t), −∞< t <∞. (a) Find the value t that minimizes g(t+4)−g(t) and justify your answer. (b) Redo (a) for X ∼N(1,σ2). Does your answer depend on σ? Explain why.
X~Normal(6,49). Find the probabilities of the following events: a. Prob(X ≤ 4). b. Prob(X > 7). c. Prob(4 < X ≤ 7).
Find the critical value t for the confidence level c = 0.99 and sample size n=9. - Click the icon to view the t-distribution table. (Round to the nearest thousandth as needed.)