The average number of words per minute that a reading class can read is 175 with...
The average number of words per minute that a reading class can read is 175 with a standard deviation of 20 words per minute. The top 4% of the class is to receive a special award. How many words would a person have to read in order to receive an award?
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The average number of words per minute that a reading class can
read is 175 with...
Winter 2018 AT 103 Test II Chapters 6-11 a( \ 1. The average number of miles that 90 truckers drove in a day was 540 with a standard what is the 99% confidence interval of the true mean number of...
Winter 2018 AT 103 Test II Chapters 6-11 a( \ 1. The average number of miles that 90 truckers drove in a day was 540 with a standard what is the 99% confidence interval of the true mean number of deviation of 40 miles, miles driven by all truckers? Dr. Christina Cuttleman, a nutritionist, claims that the average number ofcalories in a serving of popcorn is 75 with a standard deviation of 7. A sample of 50 servings of popcorn...
Suppose the national reading level for high school students is 140 words per minute with a...
Suppose the national reading level for high school students is 140 words per minute with a standard deviation of 12. A local high school wants to know if their students read at a level different from the national average. The level of the test is set at .20. A random sample size of 125 students has been drawn and the resulting average is 132 words per minute. Provide the critical value, the test statistic and the number of tails this...
The mean number of words per minute (WPM) read by sixth graders is 88 with a...
The mean number of words per minute (WPM) read by sixth graders is 88 with a standard deviation of 14 WPM If 137 sixth graders are randomly selected, what is the probability that the sample mean would be greater than 89.87 WPM? Round your answer to four decimal places.
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an estimate at the 99 % level of confidence. For a sample of 1584 third graders, the mean words per minute read was 35.7 . Assume a population standard deviation of 3.3 . Construct the confidence interval for the mean number of words a third grader can read per minute. Round your answers to one decimal place.
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an estimate at the 98% level of confidence. For a sample of 1116 third graders, the mean words per minute read was 28.1. Assume a population standard deviation of 4.2. Construct the confidence interval for the mean number of words a third grader can read per minute. Round your answers to one decimal place.
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to ensure that the estimate has an error of at most 0.26 words per minute. A previous study found that the mean was 36.7 words per minute. Assuming that the standard deviation is 4.5, what is the minimum number of third graders that must be included in a sample to construct the 85% confidence interval?
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to ensure that the estimate has an error of at most 0.22 words per minute. A previous study found that the mean was 294 words per minute. Assuming that the standard deviation is 3.9. what is the minimum number of third graders that must be included in a sample to construct the 80% confidence interval Round your answer up to...
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to ensure that the estimate has an error of at most 0.2 words per minute. A previous study found that the mean was 26.3 words per minute. Assuming that the standard deviation is 4.3, what is the minimum number of third graders that must be included in a sample to construct the 85% confidence interval? Round your answer up to...
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to ensure that the estimate has an error of at most 0.32 words per minute. A previous study found that the mean was 25.7 words per minute. Assuming that the standard deviation is 5.6, what is the minimum number of third graders that must be included in a sample to construct the 85% confidence interval? Round your answer up to...
A random sample of 15 students of a certain college an average 78.5 words per minute...
A random sample of 15 students of a certain college an average 78.5 words per minute with a standard deviation of 8.2 words per minute. Find a 99% prediction interval for the average number of words typed by all students of the college. Use t-distribution table in your computation. 53.29 <x0 < 103.71 o 55.86<x0 < 106.29 63.59 <x0 < 69.02 O 72,2 < x < 84,8
Winter 2018 AT 103 Test II Chapters 6-11 a( \ 1. The average number of miles that 90 truckers drove in a day was 540 with a standard what is the 99% confidence interval of the true mean number of deviation of 40 miles, miles driven by all truckers? Dr. Christina Cuttleman, a nutritionist, claims that the average number ofcalories in a serving of popcorn is 75 with a standard deviation of 7. A sample of 50 servings of popcorn...
The mean number of words per minute (WPM) read by sixth graders is 88 with a standard deviation of 14 WPM If 137 sixth graders are randomly selected, what is the probability that the sample mean would be greater than 89.87 WPM? Round your answer to four decimal places.
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to ensure that the estimate has an error of at most 0.22 words per minute. A previous study found that the mean was 294 words per minute. Assuming that the standard deviation is 3.9. what is the minimum number of third graders that must be included in a sample to construct the 80% confidence interval Round your answer up to...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to ensure that the estimate has an error of at most 0.2 words per minute. A previous study found that the mean was 26.3 words per minute. Assuming that the standard deviation is 4.3, what is the minimum number of third graders that must be included in a sample to construct the 85% confidence interval? Round your answer up to...
A random sample of 15 students of a certain college an average 78.5 words per minute with a standard deviation of 8.2 words per minute. Find a 99% prediction interval for the average number of words typed by all students of the college. Use t-distribution table in your computation. 53.29 <x0 < 103.71 o 55.86<x0 < 106.29 63.59 <x0 < 69.02 O 72,2 < x < 84,8
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