A normal distribution has mean 50 and standard deviation 4. Approximately what proportion
of this normal distribution lies above 58?
P[X>58]
=P[Z>2]
=1-0.9772...........................by using Z table
=0.0228
A normal distribution has mean 50 and standard deviation 4. Approximately what proportion of this normal...
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.)
Question 32 In a normal distribution with a mean of 90.00 and a standard deviation of 10, what percentage of the cases lies between scores of 80 and 907 50% 68% 34% 100%
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.)
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...
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A normal distribution has a mean of 25 and a standard deviation of 3. Find the value above which there is a .70 probability that an observation will occur. (4 points)