5. If a normal distribution has a mean of 30.5 and a standard deviation of 8.5,...
Consider a normal distribution with mean 25 and standard deviation 5. What is the probability a value selected at random from this distribution is greater than 25? (Round your answer to two decimal places.) Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) μ = 14.9; σ = 3.5 P(10 ≤ x ≤ 26) = Need Help? Read It Assume that x has a...
1. X has a normal distribution with the given mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) μ = 41, σ = 20, find P(35 ≤ X ≤ 42) 2. Find the probability that a normal variable takes on values within 0.9 standard deviations of its mean. (Round your decimal to four decimal places.) 3. Suppose X is a normal random variable with mean μ = 100 and standard deviation σ = 10....
A normal distribution has a standard deviation equal to 25. What is the mean of this normal distribution if the probability of scoring above x = 191 is 0.0228? (Round your answer to one decimal place.)
A variable x has a normal distribution with a mean of 250 and a standard deviation of 20. What value of x would have a tail area of 5.5% to the left of the mean? 281.9639 270 230 218.0361
For a normal distribution with a mean of 86 and a standard deviation of 5, the value 93 has a z value of Answer . Round to 1 decimal place.
Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four dec places.) # 39; 0 = 14 P(50 SXS 70) - Need Help? Read 13. 0-M1 points BBUnder Stat12 6.3.013 My Notes Ask You Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four de places.) - 115; 0 = 15 P(x 2 90)...
a. Consider a normal distribution with mean 20 and standard deviation 4. What is the probability a value selected at random from this distribution is greater than 20? (Round your answer to two decimal places. b. Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) μ = 14.3; σ = 3.5 P(10 ≤ x ≤ 26) = c. Assume that x has a normal...
1. Suppose a variable has a normal distribution with mean 10 and standard deviation 2. Use the Empirical Rule to calculate the approximate PERCENTAGE area. What is the PERCENTAGE of values ABOVE 12? Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 27 is entered as 27.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38 |Enter PERCENTAGE in above blank with NO % sign. | 2. Suppose a variable has a...
A normal distribution has a mean equal to 46. What is the standard deviation of this normal distribution if 2.5% of the proportion under the curve lies to the right of x = 51.88? (Round your answer to two decimal places.)
A normal distribution has a mean equal to 48. What is the standard deviation of this normal distribution if 2.5% of the proportion under the curve lies to the right of x = 55.84? (Round your answer to two decimal places.)