All the scores are whole numbers multiples of 10, - The range is 450, - It has been decided to use 8 intervals. What is the interval or class width to be used
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- All the scores are whole numbers multiples of 10,
- The range is 450,
- It has been decided to use 8 intervals.
What is the interval or class width to be used?
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- - All the scores are whole numbers, - The range is 90, - It has been decided to use 10 intervals. What is the interval or class width to be used?Suppose you have a group of fourth graders and a group of eighth graders, and you want tocompare the average amount of sleep per night, in hours, for the fourth graders vs. eighth graders.Which is the most appropriate test to use?How many students should be sampled in order to be 90% confident in estimating the proportion in favor of a certain proposition when the margin of error is 0.10?
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- How would I calculate a Chebyshev interval of 88.9% around the sample mean of 1550 people are selected randomly from a certain population and it is found that 17 people in the sample are over 6 feet tall. What is the point estimate of the proportion of people in the population who are over 6 feet tall? 50 people are selected randomly from a certain population and it is found that 17 people in the sample are over 6 feet tall. What is the point estimate of the proportion of people in the population who are over 6 feet tall?In a survey, 38% of the respondents stated that they talk to their pets on the telephone. A veterinarian believed this result to be too high, so she randomly selected 240 pet owners and discovered that 89 of them spoke to their pet on the telephone. Does the veterinarian have a right to be skeptical? Use the α=0.1 level of significance.
