for a normal distribution: a. what z-score separates the highest 40% from the rest of the...
For a normal distribution, find the z-score that separates the highest 30% from the rest of the distribution. What formula do I use to get the answer and where to find the values to use in the formula?
What proportion of a normal distribution is located between each of the following Z-score boundaries? a. z= -0.50 and z= +0.50 b. z=-0.90 and z= +0.90 c. z=-1.50 and z= 1.50 For a normal distribution with a mean of μ = 80 and a standard deviation of σ= 20, find the proportion of the population corresponding to each of the following. a. Scores greater than 85. b. Scores less than 100. c. Scores between 70 and 90. IQ test scores are standardized to produce a normal distribution with...
A normal distribution has a mean of u = 80 with o = 20. What score separates the highest 15% of the distribution from the rest of the scores? (Hint: First find the Z-score, then convert back to a raw score.) OX= 59.2 X = 100.8 X =95 X = 65
Please explain in steps, Thank You!! 7. What z-score value separates the highest 10% of the scores in a normal distribution from the lowest 90%? 8. Scores on the SAT form a normal distribution with a mean of μ-550 with σ 100. If the state college only accepts students who score in the top 65% on the SAT, what is the minimum score needed to be accepted? What does that z-score become if they change their criteria so that only...
A normal distribution has a mean of 80 with a standard deviation of 20. What score separates the highest 40% of the distribution from the rest of the scores? A) X= 54.4 B) X= 85 C) X= 75 D) X= 105.6
what z score value separates the top 70% of a normal distribution from the bottom 30%?
What z score separates the bottom 21% of the distribution from the rest of the distribution? - 0.5 +0.5 - 0.8 +0.8 Dr. Kelly predicted students in his evening classes slept fewer hours per week than students in his morning classes. The hypothesis specified is called a __________ hypothesis and the critical region is ________. Two tailed, split between the two tails of the distribution One tailed; concentrated in one tail of the distribution Bi-directional, concentrated in one tail of...
In a standard normal distribution, find the following values: The probability that a given z score is less than -2.67 The probability that a given z score is between 1.55 and 2.44 The z scores that separates the most inner (middle) 82% of the distribution to the rest The z score that separate the lower 65 % to the rest of the distribution
A normal distribution of scores has a mean of 240 and a standard deviation of 40. 1. What score separates the top 40% of the scores from the rest? 2. What score corresponds to the 90th percentile?
For a normal distribution with µ = 200 and s = 50, find the following values. [Hint: First find the z-score from the Standard Normal Table at the back of your text and then find the X value]. a. What X value separates the highest 10% of the distribution from the rest of the scores? b. What X values form the boundaries for the middle 60% of the distribution? c. What is the probability of randomly selecting a score greater...