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Image transcription textD2L McGraw-Hill Connect - 23M --Re x

M Question 3 - 10 - Quiz 4 (Week 1( X

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Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean number of litres (L) of gasoline sold to his

customers. Assume the number of litres sold follows the normal distribution with a standard deviation of 18 L. From his records, he

selects a random sample of 18 sales and finds the mean number of litres sold is 56.

a. What is the point estimate of the population mean? (Round the final answer to the nearest whole number.)

X 01:54:51

The point estimate of the population mean is

litres.

b. Develop a 80% confidence interval for the population mean. (Round the final answers to 3 decimal places.)

The 80% confidence interval for the population mean is between

and

c. Interpret the meaning of part (b).

If 100 such intervals were determined, the population |(Click to select) v | would be included in about

intervals.

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2023-07-20... Show moreBob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean number of litres (L) of gasoline sold to his customers. Assume the number of litres sold follows the normal distribution with a standard deviation of 18 L. From his records, he selects a random sample of 18 sales and finds the mean number of litres sold is 56.Image transcription textD2L McGraw-Hill Connect - 23M --Re x

M Question 10 - 10 - Quiz 4 (Week >

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Personal Banking a.. Centennial email - L... C| Centennial College... G grammarly Free APA Citation G. Service Finder - Tak.. = The Phsycology of. Virgin Plus - My Bill @ e-consular

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There are 250 welders employed at the Weller Shipyards Corporation. A sample of 36 welders revealed that 27 had graduated from a

10

registered welding course. Construct the 98% confidence interval for the proportion of all welders who graduated from a registered

welding course. (Round the final answers to 3 decimal places.)

The confidence interval is between

and

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