What does it mean when the Z score of a value is less than -2?
What does it mean when the Z score of a value is larger than 2?
Suppose that student’s z score is 3.00 what does this mean? discuss in terms of units of standard deviation It means the value defined by z-score is 3 standard deviations away from the mean value. Discuss in terms of its percentile score. In terms of percentile score, its mean amount of data lies below the value. Z=3 represent the 99.87 the percentile. 4. How does this student’s z score differ from another student whose z score is -3.00 5. If...
need solutions for questions 1-3 1. What is the difference between a z-score and a z-value? Explain. Explain why the data set below does not resemble a normal distribution: 0, 0, 0, 2, 2, 4, 6, 6, 8, 8, 8 2. Explain what is meant by the following statement "the results are accurate within 3. 2.5%, 27 times in 30" 1. What is the difference between a z-score and a z-value? Explain. Explain why the data set below does not...
6. (a) What does it mean when a score is in a tail of a normal distribution? (b) What is the difference between scores in the left-hand tail and scores in the right-hand tail?
1. What is the z-score for an observation of 10.9 when the mean is 11.8 and the standard deviation is 1.3? 2. Suppose that I flip a fair coin 34 times. What is the probability that it will land on heads exactly 19 times? Make sure your answer is between 0 and 1. 3. Suppose you are taking a multiple choice exam with 75 questions, each with 4 possible answers. If you were to guess at random for each question,...
In a normal distribution, the mean corresponds to: Standard Score: z = Percentile: Which of the following statements are TRUE about the normal distribution? Check all that apply. A data value with z-score = -1.5 is located 1.5 standard deviations below the mean. The mean corresponds to the z-score of 1. The Empirical Rule only applies when a value is exactly 1, 2, or 3 standard deviations away from the mean. A z-score is the number of standard deviations a...
What z-score corresponds to a score that is 2 standard deviation units ABOVE the mean? (PLEASE SHOW WORK) A). z= +1.50 B). z= -1.50 C). z= -2.00 D). z= +2.00
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...
Find the sample mean and sample standard deviation of your data. What is the Z score? Pick three bills from the last 12 months and change the values into z-scores. What does the z-score tell you about that particular month? Between what two values would be considered a normal bill? Remember, being within 2 Standard Deviations is considered normal. Are any of your bills in the last 12 months unusual? Very unusual? Are there times when you would accept an...