Suppose that a category of world class runners are known to run a marathon (26 miles) in an average of 142 minutes with a standard deviation of 15 minutes. Consider 49 of the races. Let X = the average of the 49 races. O Part (a) Give the distribution of X. (Round your standard deviation to two decimal places.) O Part (b) Find the probability that the average of the sample will be between 140 and 145 minutes in these 49 marathons. (Round your answer to four decimal places.) O Part (c) Find the 80th percentile for the average of these 49 marathons. (Round your answer to two decimal places.) min

Q: Give the boundaries of the indicated value 77.2 miles

A: Given The data is as follows: The indicated value is 77.2 miles.

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Q: Find the area of △ABC if C = 74 ̊, a = 21 miles, and b = 63 miles.

A:

Q: find the unite rate 3.75 pints out of every 5 galons

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Q: I have to round m and b to 3 decimal places

A: Let's find both value at 3 decimal places.

Q: नर १U५ %3D 2.

A:

Q: A student earns a semester GPA of 2.8 for 12 semester hours.  Prior to this the student had a GPA of…

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Q: One square meter equals 10,000 cm2. Use this information to convert 3 m2 to square centimeters. 3 m2…

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Q: 2. 279feet 3. 9/279 unit 9seconds per ra 27 6.

A:

Q: 13 people fit comfortably in a 5 feet by 5 feet area.  Use this value to estimate the size of a…

A: Number of people can fit comfortably in a given area = 13 Given area = 5 x 5                    = 25…

Q: B

A:

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A: Find the temperature at which the Celsius measurement and the Fahrenheit measurement are the same…

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A: Calories per minute burned by snowshoeing= 8 calories/min   Calories per minute burn by skiing= 6…

Q: Step 3: Fill out the following chart. Make sure you pay attention to the unit use kilometers and…

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Q: Find the total cost of 95 heater filters that cost $2 each.

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Q: school is paving a new rectangular area to create an additional, flat parking lot for teachers.…

A: Since, S.I. unit of measure distance is metre. So, unit for area of rectangular space is metre x…

Matrices

‘Matrices’ is the plural form of the word matrix, and it is basically a spreadsheet in the form of a box. In mathematics, various functions can be carried out with matrices. Generally, a matrix comes in the shape of a square or rectangle. The elements are distributed horizontally in the form of rows, and vertically in the form of columns.