Use the following number to answer the question below:
X = 380
µ = 370
σ = 20.2
n = 30
What is the Z score? Use the following number to answer the question below: X =...
1. What position in the distribution corresponds to a z-score of z = .50? A. Below the mean by a distance equal to 0.5 standard deviations. B. Below the mean by 0.5 points. C. Above the mean by 0.5 points. D. Above the mean by a distance equal to 0.5 standard deviations. 2. Which of the following z-score values represents the location closest to the mean? A. z=+1.50 B. z=+1.00 C. z=-0.75 D. z=-2.00 3. For a population with µ...
Let’s calculate the Z-score and use the Z-table with some real life examples. Be sure to show your work. 500 University student’s exam scores are determined at the end of the semester. Patty scored 850 marks (X) in total out of 1000. The average score for the tests was 725 (µ) and the standard deviation was 180 (σ). Let’s find out how well Patty scored compared to her peers. Using the above data we need to first standardize his score...
Use the formula for finding a z-score to determine the missing value in the following table. Round your answer to two decimal places, if necessary. z x μ σ 1.14 ? −23.40 3.28
Use the given z-score/percentile table to answer the following question: If scores on a test are normally distributed with mean 48 and standard deviation 10, what percentage are above 62? z-score 1.1 1.2 1.3 1.4 1.5 percentile 86.43 88.49 90.32 91.92 93.32
Question Suppose X∼N(12.5,1.5), and x=11. Find and interpret the z-score of the standardized normal random variable. Provide your answer below: The z-score when x=11 is . The mean is . This z-score tells you that x=11 is standard deviation(s) to the left of the mean
Suppose X ~ N(8, 6). What value of x has a z-score of -0.4? x = ______? Round to one decimal place. If your answer is a whole number, just type that number without a decimal.
4 pts Question 47 8, find the Z-score corresponding to each of the following X For a population with a h = 40 and o = values: a. X-42; b. X-52; c. X=36; d. X-32 HTML Editor A population of scores with a u = 43 and o = 8 is standardized to create a new population distribution with a fi = 50 and o = 10. What is the new X value for each of the following scores from...
Suppose X ~ N(4, 3). What is the z-score of x = 4? (Enter an exact number as an integer, fraction, or decimal.) z =
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...
Suppose X ~ N(8, 1). What value of x has a z-score of −1.25? (Enter an exact number as an integer, fraction, or decimal.) x=