What percentage of scores falls in the tails of a normal curve?
Q: What is the 73rd percentile of a normal curve? * Previous
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Q: In a standard normal distribution, the mean is always 0 Does this suggest that half of the scores…
A: In a standard normal distribution, the mean is always 0 and the Standard deviation is always equal…
Q: What proportion of scores are below z score of 1.0 in a normal distribution?
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Q: Quartering a positive mean (dividing by 4) has what effect on the normal curve?
A: The normal distribution: A continuous random variable X is said to follow normal distribution if the…
Q: Why is normal distribution important in statistics and in everyday life?
A: Normal Distribution is important in statistics because many natural phenomena follows Normal…
Q: What is the value of the standard score for the mean of a distribution
A: The standard score is the same as the Z-value. This is the distance of any data value, measured in…
Q: How is the normal curve important in psychological testing?
A: Here we have to explain how the normal curve important in psychological testing
Q: standardized scores and normal
A: Normal distributions have a specific curve, and I’ve already posted about that elsewhere; the…
Q: What proportion of scores in a normal distribution is below Z = -0.75?
A: Required probability is P(Z<-0.75)
Q: What is the formula for a deviation score from a population?
A: Formula :
Q: Describe about the Properties of the Normal Curve?
A: A normal curve is identified using the values of the mean and standard deviation to show the…
Q: Can you describe the normal curve and explain why the normal curve in real-life distributions will…
A: Normal distribution: A normal distribution is the proper term for a probability bell curve. In a…
Q: What proportion of scores in a normal distribution fall below z= -1.32 ?
A: The standard normal distribution:A continuous random variable Z is said to follow standard normal…
Q: Find the proportion of scores greater than 70 mean is 90 standard deviation is 10
A: The standard normal distribution:A continuous random variable Z is said to follow standard normal…
Q: What is the difference between standard deviation and standard error?
A: Standard deviation: Standard deviation determines how the individual values of the data deviate from…
Q: What proportion of the scores in a normal distribution falls below z= -1.32?
A: Let X ~ N(0,1). Then, P(X<-1.32)=P(X>1.32) [ As X is symmetric about…
Q: What z-score value separates the highest (top) 40% of the exam scores in a normal distribution from…
A: To find The z-score value that separates the highest (top) 40% of the exam scores in a normal…
Q: How do I determine standard deviation of an average score?
A: Solution: Let X be the score and n be the sample size. Standard deviation of scores should be known…
Q: What z-score value separates the highest 10% of the scores in a normal distribution from the lowest…
A: We want to find highest 10% value for z score
Q: What are the characteristics of a normal distribution? What two characteristics make a distribution…
A: Given that What are the characteristics of a normal distribution? What two characteristics make a…
Q: What proportion of a normal distribution is located between the mean and z = -0.47?
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Q: Scores on the SAT form a normal distribution with a mean of 500 and standard deviation of 100. If…
A: We have to find the proportion of people who will be accepted.
Q: Ninety nine percent of scores fall between 3 and -3 standard deviations from the mean. True or…
A: The empirical rule is helpful for interpreting the values for a standard deviation. According to…
Q: If a class has an average of 71 with a SD of 10, use a Normal Curve to estimate the percent of the…
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Q: What is the difference between a normal and binomial distribution?
A: Statistics uses normal distributions more often than binomial distributions most of the time.…
Q: How do I explain applying the normal curve to a set of test scores?
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Q: what is the importance of knowing the concepts of a normal curve?
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Q: What proportion of scores are above z score of 0 in a normal distribution?
A: From the provided information, The proportion of scores are above z score of 0 in a normal…
Q: Explain how you would determine the probability of belonging to the top 5% of a class. Illustrate…
A: Normal distribution: A continuous random variable X is said to follow normal distribution if the…
Q: The achievement scores for a college examination are normally distributed with mean 75 and standard…
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Q: About what percentage of a normal distribution falls within 2.5 standard deviations of the mean?
A: 98.76 percentage of a normal distribution falls within 2.5 standard deviations of the mean
Q: What z-score value separates the highest 70% of the scores in a normal distribution from the lowest…
A: Normal distribution is given.
Q: A normal distribution has a mean of µ = 80 with σ = 20. What score separates the highest 40% of the…
A: The given distribution is normal with mean 80 and standard deviation 20.
Q: On a normal curve, where do most scores fall?
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Q: What happens to the graph of the normal curve as the mean increases?
A: The graph of the normal curve as the mean increases.
Q: Which percentage is the best estimate for the shaded area under this normal curve?
A: From given curve, Mean = -20 And SD = 10 Let X denote the distribution. Given that X follows N(mean…
Q: Statistically what is “all the children are above average.” mean
A: The mean (average) is referred to the central measure of the given data. The mean value indicates…
Q: What are the characteristics of a normal distribution?
A: Normal distribution- It is a frequency distribution curve. It is also called bell shaped curve. In…
Q: According to the Empirical Rule, in a Normal Distribution of data you will have
A: We know that Empirical rule : 68% data lies within one standard deviation of the Mean. ( μ ± σ) 95%…
Q: what is your SAT score if scored in the 95th percentile? mean:1000 standard Deviation: 250
A: Obtain the SAT score if scored in the 95th percentile. The SAT score if scored in the 95th…
Q: How to Convert raw scores to deviation scores?
A: Standard normal distribution: Standard normal distribution is the normal distribution with mean as 0…
Q: What does it mean to say that the graph of the normal distribution is symmetric?
A: Solution: From the given information, the graph of the normal distribution is symmetric.
Q: What is the Importance of Mean and Standard Deviation in normal curve?
A: A low standard deviation indicates that the data points tend to be very close to the mean, whereas…
Q: how to find outlier from data in normal distribution ?
A: Solution: From the given information, the distribution is normal.
Q: What are the percentages of scores that fall between a)-1 and 0/0 and 1 b) -1 and -2/1 and 2)c in…
A: Given Empirical rule: For a normal distribution, 68% of values fall within 1 standard deviation of…
Q: What does a negative z score mean?
A: In this question we have to tell what does the negative Z score implies. A Z Score means that how…
Q: A class of 150 students took a final examination in science. The mean score was 72% and the standard…
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Q: What percentage of area is above the mean on a normal curve?
A: Solved below.
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