Homework Answers
A) In normal distribution when we say that score is in tail of distribution it means the value of random variable is far from the mean by distance more than 2 standard deviation on either sides.
B) the score in left tail means the value of random variable is less than (mean-2*standard deviation)
And the score in right tail means the value of random variable is more than (mean+2*standard deviation).
In a normal distribution, what does it mean that “the score of 75 was 2 standard...
In a normal distribution, what does it mean that “the score of 75 was 2 standard deviations away from the mean?
In a normal distribution, the mean corresponds to: Standard Score: z = Percentile: Which of the...
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 proportion of a normal distribution is located between each of the following Z-score boundaries?...
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...
Question 4 (1 point) The median is 1) the most frequently occurring score on a test....
Question 4 (1 point) The median is 1) the most frequently occurring score on a test. 2) the middle score when results are ranked in order of magnitude 3) the same as the mean. 4) the difference between the maximum and minimum scores Question 5 (1 point) A set of scores is presented in a histogram. The histogram shows a series of bars that tend to decrease in height from left to right. What is the shape of the distribution?...
Determine the area under the standard normal curve that lies between (a) Z=−1.72 and Z=1.72, (b)...
Determine the area under the standard normal curve that lies between (a) Z=−1.72 and Z=1.72, (b) Z=−2.89 and Z=0, and (c) Z=−0.43 and Z=0.96. Find the z-score such that the area under the standard normal curve to the left is 0.57. Find the z-score such that the area under the standard normal curve to the right is 0.11. The approximate z-score that corresponds to a right tail area of 0.11 is ___. Find the z-scores that separate the middle 31%...
Problem 6 In some state the mean ACT score in Mathematics is μACT = 19 and...
Problem 6 In some state the mean ACT score in Mathematics is μACT = 19 and the standard deviation is σ ACT = 6, while the mean SAT score in Mathematics is AsAT = 480 and the standard deviation is AT 90. Suppose that the ACT scores and the SAT scores have a normal distribution. Terence gets a score of 17 on the Mathematics portion of the ACT and Philip gets a score of 356 on the Mathematics portion of...
A normal distribution has a mean of 80 with a standard deviation of 20. What score...
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
. Frequency distribution terminology Aa Aa A. Normal-Shaped Distribution B. Tail of a Distribution C. Symmetrical...
. Frequency distribution terminology Aa Aa A. Normal-Shaped Distribution B. Tail of a Distribution C. Symmetrical Distribution D. Negatively Skewed Distribution E. Histogram F. Positively Skewed Distribution G. Class Intervals H. Bar Graph Match each of the following descriptions with its corresponding term. Enter the letter corresponding to the correct term in the blank. To keep track of terms used, you can check off terms as you use them by clicking within the box to the left of the term....
The difference between a standard score of -1.0 and a standard score of 1.0 is a)...
The difference between a standard score of -1.0 and a standard score of 1.0 is a) the standard score 1.0 is farther from the mean than -1.0 b) the standard score -1.0 is farther from the mean than 1.0 c) the standard score 1.0 is above the mean while -1.0 is below the mean. d) the standard score -1.0 is above the mean while 1.0 is below the mean. 16 17 If the test scores on an art history exam...
A normal distribution has a mean of u = 80 with o = 20. What score...
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
Question 4 (1 point) The median is 1) the most frequently occurring score on a test. 2) the middle score when results are ranked in order of magnitude 3) the same as the mean. 4) the difference between the maximum and minimum scores Question 5 (1 point) A set of scores is presented in a histogram. The histogram shows a series of bars that tend to decrease in height from left to right. What is the shape of the distribution?...
Problem 6 In some state the mean ACT score in Mathematics is μACT = 19 and the standard deviation is σ ACT = 6, while the mean SAT score in Mathematics is AsAT = 480 and the standard deviation is AT 90. Suppose that the ACT scores and the SAT scores have a normal distribution. Terence gets a score of 17 on the Mathematics portion of the ACT and Philip gets a score of 356 on the Mathematics portion of...
. Frequency distribution terminology Aa Aa A. Normal-Shaped Distribution B. Tail of a Distribution C. Symmetrical Distribution D. Negatively Skewed Distribution E. Histogram F. Positively Skewed Distribution G. Class Intervals H. Bar Graph Match each of the following descriptions with its corresponding term. Enter the letter corresponding to the correct term in the blank. To keep track of terms used, you can check off terms as you use them by clicking within the box to the left of the term....
The difference between a standard score of -1.0 and a standard score of 1.0 is a) the standard score 1.0 is farther from the mean than -1.0 b) the standard score -1.0 is farther from the mean than 1.0 c) the standard score 1.0 is above the mean while -1.0 is below the mean. d) the standard score -1.0 is above the mean while 1.0 is below the mean. 16 17 If the test scores on an art history exam...
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
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