9.4 The heights of a random sample of 50 college stu- dents showed a mean of 174.5 centimeters and a stan- dard deviation of 6.9 centimeters. a) Construct a 98% confidence interval for the mean height of all college students. b) What can we assert with 98% confidence about the possible size of our error if we estimate the mean height of all college students to be 174.5 centime- ters?

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Q: average breaking strength is 50 kN, with a standard deviation of 2 kN. Find a 95% confidence…

A:

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A: Z = 2.2 , μ  = 115 , σ= 15

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A: Given that, Mean = 48.1 Standard deviation = 0.12 Sample size = 100 98% confidence level

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Q: A report said that the average blood pressure is  130.71  for a sample of  37  white males aged  35…

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Q: use this to find a 95% confidence interval for the mean height of all red maple trees

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A: Given information Sample size(n) = 100 Sample mean x̅ =38.5 Sample standard deviation = 3.2…

Q: A marine biologist is interested in whether the chinook salmon a particular species of salmon in the…

A: The value of sample mean is, x¯=36 The value of margin of error is, ME= 9

Q: At a college, a popular achievement test is used for advanced college placement. Counselors selected…

A:

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A:

Q: 2. In a recent study of 35 college students, the mean number of hours per week that they played…

A: According to the given information in this question  We need to find the 95% confidence interval

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A: Given Mean = 182.9 Standard deviation=121.8 n=54

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A:

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Q: The average GRE scores of graduated students at a particular university has an unknown mean and…

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A: From the given data: n=36   number of values below 62=30

Q: The critical value for assessing the difference between two proportions at the 0.05 level, or .025…

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Q: The height of a species of tree is normally distributed with population standard deviation 5ft. How…

A: It is given that Population std. deviation = 5Margin of error, E = 2Confidence level = 90%