In a population with μ = 50, σ = 10, what are the minimum and maximum scores
allowed in order to be in the middle 95%?
In a population with μ = 50, σ = 10, what are the minimum and maximum...
Suppose the IQ is normally distributed with μ = 105 and σ=20. Answer the following questions. You need to write down the calculator function you use, and the data you input calculator. a. Find the 40th percentile IQ 5. b. Find the % of people whose IQ is higher than 120 c. If you want to be in top 10% IQ, your IQ has to be at least what? d, what is the cut off scores for IQ's of the...
A population of N = 10 scores has a mean of μ = 24 with SS = 160, a variance of σ2 = 16, and a standard deviation of σ = 4. For this population, what is Σ(X − μ)? A. 0. B. 4. C. 16. D. 160
A population of values has a normal distribution with μ=90.9 μ=90.9 and σ=46.3 σ=46.3 . You intend to draw a random sample of size n=69 n=69 . Find the probability that a single randomly selected value is between 78.6 and 89.8. P(78.6 < X < 89.8) = Find the probability that a sample of size n=69 n=69 is randomly selected with a mean between 78.6 and 89.8. P(78.6 < M < 89.8) = Enter your answers as numbers accurate to...
Questions 23-30: A normal population has a mean μ = 50 and a standard deviation σ = 8. That is, ?~?(50,8). Circle your final answer for each question below. 26. If samples of size 25 are drawn from the population, what is the mean of the sampling distribution of ?̅? 27. If samples of size 25 are drawn from the population, what is the standard deviation of the sampling distribution of ?̅?
Suppose a population of scores x is normally distributed with μ = 150 and σ = 12. Use the standard normal distribution to find the probability indicated. (Round your answer to four decimal places.) Pr(x > 180)
10. A measurement population has μ-: 15.00 and σ 2.00. (a) What percentage of measurements are expected to be between 12.00 and 18.00? Between 14.00 and 19.00? Between 10.00 and 11.00? (b) What interval around the mean will encompass 85% of the measurements? [Ans. (a) 86.64%, 66.88%, 1.65% (b) 15.00 +2.88)
We have a normally distributed population of scores with μ = 25 and σ = 5. We have drawn a large number of random samples with a particular sample size of n = 10 from this population. We want to know what the probability that a sample mean will be equal to or greater than 23. First, what is the z-score for our sample mean of interest, 23? Using this z-score , use statistics table to answer the question "What...
A random sample of size 36 is to be selected from a population that has a mean μ = 50 and a standard deviation σ of 10. * a. This sample of 36 has a mean value of , which belongs to a sampling distribution. Find the shape of this sampling distribution. * b. Find the mean of this sampling distribution. * c. Find the standard error of this sampling distribution. * d. What is the...
Imagine you take an exam in which the μ = 50, and σ = 10. You receive a score at the 46th percentile. What is your raw score?
1) The population of SAT scores is normal with μ = 500 and σ = 100. If you get a sample of n = 25 students, what is the probability that the sample mean will be greater than M=540? Be sure to draw out your distribution and clearly indicate where the score falls within the distribution. Also shade in the area in question. 2) For a given μ = 80 and σ = 25. If you get a sample of...