The scores of an eighth-grade math test have a normal distribution with a mean = 83 and...
The scores of an eighth-grade math test have a normal distribution with a mean = 83 and a standard deviation = 5. If Din’s test score was 92, which expression would she write to find the z-score of her test score?
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The scores of an eighth-grade math test have a normal
distribution with a mean = 83 and...
The scores on a standardized math test for 8th grade children form a normal distribution with...
The scores on a standardized math test for 8th grade children form a normal distribution with a mean of 80 and a standard deviation of 10. (8 points) 26. a. What proportion of the students have scores less than X- 83? b. If samples of n 6 are selected from the population, what proportion of the samples have means less than M 83? c. If samples of n 30 are selected from the population, what proportion of the samples will...
A random sample of 86 eighth grade students' scores on a national mathematics assessment test has...
A random sample of 86 eighth grade students' scores on a national mathematics assessment test has a mean score of 275. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 270. Assume that the population standard deviation is 33. At alpha=0.05, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify H0 and...
The National Assessment of Educational Progress (NAEP) includes a mathematics test for eighth-grade students. Scores on...
The National Assessment of Educational Progress (NAEP) includes a mathematics test for eighth-grade students. Scores on the test range from 0 to 500. Demonstrating the ability to use the mean to solve a problem is an example of the skills and knowledge associated with performance at the Basic level. An example of the knowledge and skills associated with the Proficient level is being able to read and interpret a stem-and-leaf plot. In 2015, 136,900 eighth-graders were in the NAEP sample...
A state administered standardized reading exam is given to eighth grade students. The scores on this...
A state administered standardized reading exam is given to eighth grade students. The scores on this exam for all students statewide have a normal distribution with a mean of 532 and a standard deviation of 48. A local Junior High principal has decided to give an award to any student who scores in the top 10% of statewide scores. How high should a student score be to win this award? Give your answer to the nearest integer.
2 Applications of the Normal Distribution part 2 Calculate the Mean and Standard Deviation of a...
2 Applications of the Normal Distribution part 2 Calculate the Mean and Standard Deviation of a Normal Distribution Question Emma was told that her math test score was I standard deviation above the mean. If test scores were approximately normal with 77 and σ 8, what was Emma's score? not include units in your answer. For example, if you found that the score was 77 points, you would enter 77 Provide your answer below FEEDBACK MORE INSTRUCTION 5 6
A random sample of 75 eighth grade students' scores on a national mathematics assessment test has...
A random sample of 75 eighth grade students' scores on a national mathematics assessment test has a mean score of 279. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 275. Assume that the population standard deviation is 34. At c = 0.03, is there enough evidence to support the administrator's claim? Complete parts (a) through (). (a) Write the claim mathematically and identify...
A random sample of 86 eighth grade students' scores on a national mathematics assessment test has...
A random sample of 86 eighth grade students' scores on a national mathematics assessment test has a mean score of 267. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 260. Assume that the population standard deviation is 31. At α=0.12, is there enough evidence to support the administrator's claim? Complete parts (a) through (a) Write the claim mathematically and identify Ho and H...
A random sample of 86 eighth grade students' scores on a national mathematics assessment test has...
A random sample of 86 eighth grade students' scores on a national mathematics assessment test has a mean score of 272. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 270. Assume that the population standard deviation is 34. At a=0.14, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify H, and...
State administered standardized reading exam is given to eighth grade students. The scores on this exam...
State administered standardized reading exam is given to eighth grade students. The scores on this exam for all students statewide have a normal distribution with a mean of 536 and a standard deviation of 70. A local Junior High principal has decided to give an award to any student who scores in the top 10% of statewide scores. How high should a student score be to win this award? Give your answer to the nearest integer. For help on how...
Question 3: Consider the Standard Normal Distribution with mean 0 and standard deviation 1. Find the...
Question 3: Consider the Standard Normal Distribution with mean 0 and standard deviation 1. Find the following. a) P (z>0.5) b) P(z 1.5) c) P (-0.49 < z1.5) Question 4: If you have a normal distribution with mean 14 and standard deviation of 2. What is P(x >16)? Question 5 Professor Hardy assumes the exam scores are normally distributed and wants to grade "on a curve." The mean score was 68, with a standard deviation of 9, If he wants...
The scores on a standardized math test for 8th grade children form a normal distribution with a mean of 80 and a standard deviation of 10. (8 points) 26. a. What proportion of the students have scores less than X- 83? b. If samples of n 6 are selected from the population, what proportion of the samples have means less than M 83? c. If samples of n 30 are selected from the population, what proportion of the samples will...
The National Assessment of Educational Progress (NAEP) includes a mathematics test for eighth-grade students. Scores on the test range from 0 to 500. Demonstrating the ability to use the mean to solve a problem is an example of the skills and knowledge associated with performance at the Basic level. An example of the knowledge and skills associated with the Proficient level is being able to read and interpret a stem-and-leaf plot. In 2015, 136,900 eighth-graders were in the NAEP sample...
2 Applications of the Normal Distribution part 2 Calculate the Mean and Standard Deviation of a Normal Distribution Question Emma was told that her math test score was I standard deviation above the mean. If test scores were approximately normal with 77 and σ 8, what was Emma's score? not include units in your answer. For example, if you found that the score was 77 points, you would enter 77 Provide your answer below FEEDBACK MORE INSTRUCTION 5 6
A random sample of 75 eighth grade students' scores on a national mathematics assessment test has a mean score of 279. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 275. Assume that the population standard deviation is 34. At c = 0.03, is there enough evidence to support the administrator's claim? Complete parts (a) through (). (a) Write the claim mathematically and identify...
A random sample of 86 eighth grade students' scores on a national mathematics assessment test has a mean score of 267. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 260. Assume that the population standard deviation is 31. At α=0.12, is there enough evidence to support the administrator's claim? Complete parts (a) through (a) Write the claim mathematically and identify Ho and H...
A random sample of 86 eighth grade students' scores on a national mathematics assessment test has a mean score of 272. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 270. Assume that the population standard deviation is 34. At a=0.14, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify H, and...
Question 3: Consider the Standard Normal Distribution with mean 0 and standard deviation 1. Find the following. a) P (z>0.5) b) P(z 1.5) c) P (-0.49 < z1.5) Question 4: If you have a normal distribution with mean 14 and standard deviation of 2. What is P(x >16)? Question 5 Professor Hardy assumes the exam scores are normally distributed and wants to grade "on a curve." The mean score was 68, with a standard deviation of 9, If he wants...
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