In a normal distribution of = 50 and SD = 7: What is the score at...
- In a normal distribution of = 50 and SD = 7:
- What is the score at the 75th percentile (hint: on the table, find the z-score at .750 and change back to a raw score)?
- Find the percent of cases scoring above 55.
- Between what scores to the middle 25% of the cases lie?
- Beyond what scores do the most extreme cases lie?
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In a normal distribution of = 50 and SD = 7:
What is the score at...
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
For a normal distribution with µ = 200 and s = 50, find the following values....
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...
13. If we have a normal distribution with a mean of 75 and a standard deviation of 3. a. what z-score(s) would cut off the middle 40% of the distribution? b. what raw score(s) would cut off the l...
13. If we have a normal distribution with a mean of 75 and a standard deviation of 3. a. what z-score(s) would cut off the middle 40% of the distribution? b. what raw score(s) would cut off the lower 12% of the distribution? c, what raw score(s) would cut off the most extreme 5% of the distribution? d, what T-score(s) would cut off the upper 20% of the distribution?
13. If we have a normal distribution with a mean of...
A normal-shaped distribution has u 130 and o = 24. (a) What are the Z-score values...
A normal-shaped distribution has u 130 and o = 24. (a) What are the Z-score values that form the boundaries for the middle 98% of the distribution of sample means? lower z-score boundary: upper Z-score boundary: Report answers accurate to at least 3 decimal places. 36 scores. (b) Compute the z-score for M 140 for a sample of n = Z-score = Report answers accurate to at least 3 decimal places. (c) Is this sample mean in the middle 98%...
You will be given a series of questions regarding a normal distribution, you will be asked...
You will be given a series of questions regarding a normal
distribution, you will be asked to either determine the percentage
above or below particular raw scores; or to calculate the raw score
that will correspond to a particular percentage.
You will be asked to calculate either raw scores or
percentages. For each question write out your calculation, the
appropriate Z score, what on the curve you should be shading, the
exact percentage from the normal curve table and the...
In a standard normal distribution, find the following values: The probability that a given z score...
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
Calculating percentages You will be glven a series of questions regarding a normal distribution, you will...
Calculating percentages
You will be glven a series of questions regarding a normal distribution, you will be asked to elther determine the percentage above or below particular raw scores; or to calculate the raw score that will correspond to a particular percentage. You will be asked to calculate either raw scores or percentages. For each questign write out your calculation, the appropriate Z score, what on the curve you should be shading, the exact percentage from the normal curve table...
In recent years, SAT scores are approximately normal with a mean of 1100 and a SD...
In recent years, SAT scores are approximately normal with a mean of 1100 and a SD of 130, while ACT scores are also approximately normal with a mean of 22 and a SD of 6.5. Without any studying, you took both tests and scored 1250 on the SAT and 24 on the ACT.Did you do better on the SAT or the ACT? Make sure to find the percentile (what percent of the test takers scored lower than you?) of each...
Normal Probability Distribution Instructions: Read the scenario and answer the questions below. R...
Normal Probability Distribution Instructions: Read the scenario and answer the questions below. Round al probablities and proportions to 4 dedimal places The Graduate Record Examination (GRE) is a test required for admission to many U.S. graduate schools. Students' scores on the quantitative portion of the GRE follow a normal distribution with mean 150 and standard deviation 8.8. (Source:www.ets.org). A grad school requires that students score above 160 to be admitted. 1. What proportion of combined GRE scores can be expected...
Statistics exam scores follow a standard normal distribution with mean 0 and standard deviation 1. Find...
Statistics exam scores follow a standard normal distribution with mean 0 and standard deviation 1. Find each of the following probabilities of the given scores. (a)Less than 2.71 (b)Greater than -0.96 (c)Less than -2.18 (c)Between -1.30 and 0.45 (d)Find the 75th percentile of these Statistics exam scores. (e) Find the Statistics exam scores that can be used as cutoff values separating the most extreme (high and low) 2% of all scores.
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
13. If we have a normal distribution with a mean of 75 and a standard deviation of 3. a. what z-score(s) would cut off the middle 40% of the distribution? b. what raw score(s) would cut off the lower 12% of the distribution? c, what raw score(s) would cut off the most extreme 5% of the distribution? d, what T-score(s) would cut off the upper 20% of the distribution?
13. If we have a normal distribution with a mean of...
A normal-shaped distribution has u 130 and o = 24. (a) What are the Z-score values that form the boundaries for the middle 98% of the distribution of sample means? lower z-score boundary: upper Z-score boundary: Report answers accurate to at least 3 decimal places. 36 scores. (b) Compute the z-score for M 140 for a sample of n = Z-score = Report answers accurate to at least 3 decimal places. (c) Is this sample mean in the middle 98%...
You will be given a series of questions regarding a normal
distribution, you will be asked to either determine the percentage
above or below particular raw scores; or to calculate the raw score
that will correspond to a particular percentage.
You will be asked to calculate either raw scores or
percentages. For each question write out your calculation, the
appropriate Z score, what on the curve you should be shading, the
exact percentage from the normal curve table and the...
Calculating percentages
You will be glven a series of questions regarding a normal distribution, you will be asked to elther determine the percentage above or below particular raw scores; or to calculate the raw score that will correspond to a particular percentage. You will be asked to calculate either raw scores or percentages. For each questign write out your calculation, the appropriate Z score, what on the curve you should be shading, the exact percentage from the normal curve table...
Normal Probability Distribution Instructions: Read the scenario and answer the questions below. Round al probablities and proportions to 4 dedimal places The Graduate Record Examination (GRE) is a test required for admission to many U.S. graduate schools. Students' scores on the quantitative portion of the GRE follow a normal distribution with mean 150 and standard deviation 8.8. (Source:www.ets.org). A grad school requires that students score above 160 to be admitted. 1. What proportion of combined GRE scores can be expected...
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