distributed, with mean μ=55 and standard deviation σ=4. Find the 6th percentile
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A: Let "X" be the IQ score of the adults.
Q: Assume that adults have IQ scores that are normally distributed with μ=105 and a standard deviation…
A: Assume that adults have IQ scores that are normally distributed with μ=105 and a standard deviation…
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Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=100 and a standard…
A: Z = x-μσ~N(0,1)
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A: Given information: μ=60σ=8 The proportion of students required to pass=300350=0.857142857≈0.8571
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A: A normal distribution has a mean of µ=72 and standard deviation σ=8, X~N (µ=72, σ2=82).
Assume the random variable X is
and standard deviation
Find the
percentile.
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- Assume that adults have IQ scores that are normally distributed with a mean of μ=100 and a standard deviation σ=15. Find the probability that a randomly selected adult has an IQ between 89 and 111.Assuming you obtained a random sample of blood glucose levels from 32 individuals from a population and the mean of the population is 120 and the standard deviation of the sample is 15, calculate the probability that the mean blood glucose levels for the sample population will be above 127.Find the standard error of the sample mean such that we have 70 random samples with mean 40 and standard deviation of 16.
- Assume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard deviation σ=20. Find the probability that a randomly selected adult has an IQ between 93 and 117.Assume that a normal distribution of data has a mean of 24 and a standard deviation of 5.Use the empirical rule to find the percentage of values that lie below 9.Christopher has collected data to find that the total snowfall per year in Laytonville has a normal distribution. What is the probability that in a randomly selected year, the snowfall was greater than 53 inches if the mean is 92 inches and the standard deviation is 13 inches? Use the empirical rule.
- Assume the random variable X is normally distributed with mean 50 and standard deviation of 7. What is the 86th percentile?The random variable X has a uniform distribution with values between 15 and 25. What is the mean and standard deviation of X?The percent of fat calories that a person in a city consumes daily is normally distributed with a mean of about 36 and a standard deviation of 10. Suppose that 16 individuals are randomly chosen. Find the probability that the average percent of fat calories consumed in this group of 16 is less than 40.
- Suppose the length of human pregnancies from conception to birth varies according to a distribution that is normal with mean of 266 days and standard deviation of “alpha”. 11.7% of pregnancies last 284 days or more, find the variance of the distribution .Assume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard deviation σ=15. Find the probability that a randomly selected adult has an IQ between 89 and 121.he average amount of time boys and girls spend playing sports each week is believed to be the same. A sample of equal size n is taken from boys and girls , the mean of the boys is 29 hours with standard deviation 4 hours and the mean of the girls is 27 hours with standard deviation 3 hours Both populations have a normal distribution. The calculated value is 1.2 n =
