Coffee: The National Coffee Association reported that 61 % of U.S. adults drink coffee daily. A random sample of 275 U.S. adults is selected. (a) Find the mean H^. (b) Find the standard deviation o^. (c) Find the probability that more than 62 % of the sampled adults drink coffee daily. (d) Find the probability that the proportion of the sampled adults who drink coffee daily is between 0.57 and 0.63. (e) Find the probability that less than 67 % of sampled adults drink coffee daily. (f) Would it be unusual if less than 58 % of the sampled adults drink coffee daily?

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Q: It is commonly believed that the mean body temperature of a healthy adult is 98.6^\circ F. You are…

A: From the provided information, Sample size (n) = 15 Level of significance (α) = 0.01

Q: E confidempe interval for the mean percentage

A: here given, n = sample size = 390 p^ = 0.48% z score for 95 %  confidence level =1.96

Q: Is based on an online poll of 320 college graduates. Among those polled, 79% stayed at their first…

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A: From the given information we conduct Hypothesis test.

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A: Solution: Let X be the lengths of the steel rods are normally distributed with a mean of 117.6 cm…

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Q: The score on standardized test are normally distributed with a mean of 115 and standard deviation of…

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Q: The standard error of the mean serves as a special type of standard deviation. Describe about it.

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Q: please help me review for my test thank you

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Q: eported that the mean annual cost of auto insurance is 957 dollars. Assume the standard deviation is…

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Q: A sample of n = 4 scores has a variance of s2 = 64. What is the estimated standard error for the…

A:

Q: :Q12. You are given n = 8 measurements: 5, 4, 6, 7, 6, 7, 3, 7. Calculate the range, the _ sample…

A: There are 8 measurements: 5, 4, 6, 7, 6, 7, 3, 7

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A: The provided information is: The given data set: 2 2 2 4 4 6 7 7 9 9

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Q: It is commonly believed that the mean body temperature of a healthy adult is 98.6^\circ F. You are…

A: Given Population mean μ=98.6. Data given  92.9,71.4,93,90.8,88,99.1,83.1,78.1,84.1,90.8,97.7,97.7

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.