Fill in the blank. A random sample of 60 business students required an average of 50.7 minutes to complete a statistics exam. Assume that the population standard deviation to complete the exar minutes. The 98% confidence interval around this sample mean is Round to one decimal place as needed. O A. (49.8, 51.6) B. (45.4, 56.0) OC. (47.6, 53.8) O D. (48.9, 52.5)

Q: The distribution of the lengths of a commercially caught fish is bell-shaped with mean 24 cm and…

A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

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A: We have to determine which confidence level is wider.

Q: Find the sample size need to find the Population Mean if the margin of error is $105, the confidence…

A: Solution: From the given information, confidence level is 0.95, σ=315 and E=105.

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A: Given Data : Ages of Last 6 Presidents at InaugurationGeorge Bush 64Bill Clinton 46George W. Bush…

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A: The normal distribution is a continuous probability distribution that has wide applications. X…

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A: Population mean, Population standard deviation,

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A: It is given that the mean is 116.7 and the standard deviation is 2.

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Q: Determine the t score used for the confidence interval. Report to 3 decimal places. n 3 6 and 95%…

A: Solution: 23. From the given information, n=6 and the confidence level is 0.95.

Q: 0.2743 d.)

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A: Here, µ=0°C, σ=1.00°C.

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A: The sample size is 49, sample mean is 754 and population standard deviation is 33.

Q: 00 ce, and standard deviation of the sample data set. PrtScn Home

A:

Q: What symbol is used for the standard deviation when it is a sample statistic? What symbol is used…

A: We know that-

Q: Construct the confidence interval for the population mean . C=0.98, x=15.3, = 10.0, and n=75

A: The Confidence Interval formula is X  ±  Z s √(n) Where: X is the mean Z is the Z-value…

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A:

Q: Thirty randomly selected students took the calculus final. If the sample mean was 95 and the…

A: From the provided information,

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A: Given data: Confidence leval = 90% To find margin of error

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A:

Q: In a random sample of seven people, the mean driving distance to work was 24.1 miles and the…

A:

Q: Assume that population mean is to be estimated from the sample described. Use the sample results to…

A:

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A: The​ grade-level reading scores from a reading test given to a random sample of  students in an…

Q: Which interval is wider? Choose the correct answer below. The 95% confidence interval O The 90%…

A: To construct 90% and 95% confidence intervals and answer the sub-parts.

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A: Let X: be the Math SAT score.The mean math score() in 2018 is 527, and the population SD is .Sample…

Q: /hat is the 95% confidence interval for this sample mean? to 82.0 to 67.4 to 82.9 to 67.6

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A: Consider the following: IntervalFrequency (f)Midpoint…

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A: The Empirical rule says that for bell- shaped distribution,  About 68% of observations lie within 1…

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Q: Explain how In mean or proportion. Choose the correct answer below. ation vanance is mere om linding…

A: Here, Given that confidence interval for variance and confidence interval for mean or proportion.

Q: A statistics practitioner took a random sample of 60 observations from a population whose standard…

A: Sample size, Population standard deiation, Sample mean,

Q: Assume that the population has a normal distribution. Thirty randomly selected students took the…

A:

Q: A student randomly selects 10 paperbacks at a store. The sample standard deviation is $1.50.…

A: Solution To find confidence interval we will use chi square distribution.