zozo3029 zozo3029

11-02-2018
Mathematics

contestada

The olsen agricultural company has determined that the weight of hay bales is normally distributed with a mean equal to 80 pounds and a standard deviation equal to 8 pounds. based on this, what is the probability that the mean weight of the bales in a sample of n = 64 bales will be between 78 and 82 pounds?

Respuesta :

sqdancefan sqdancefan

11-02-2018

normalcdf(78, 82, 80, 8/√(64)) = 0.9544997361

The standard deviation of the sample mean will be 8/√64 = 1, so you are asking for the probability that the value will be within 2 standard deviations of the mean. This is a number most statistics students are asked to memorize.

Your probability is about 0.9545.

Answer Link

Otras preguntas

What clues from the scenario did you use to decide how steep to make each line segment?

Find the axis of symmetry, the vertex, and the y-intercept for the following quadratic equation: y=x2+2x-2

What does Will do when his mother goes to the bathroom? In the book long way down

LM is the midsegment of ABCD. AB=26 and DC=138, what is LM?

When you revise your short story, it’s fine to change __________________. A) except for the setting and characters B) except for the point of view C

Impaired Goodwill and Amortization of Patent On April 1, a patent with an estimated useful economic life of 12 years was acquired for $72,000. In addition, on D

Write the letter of the term that describes the role of the word dinnner in the following sentence: On Grandpa's birthday Toni cooked him his favorite (dinner)

A car traveling at average speed of 100km/ h cover a certain distance in 3hours

What is the current condition of the towns of Pripyat and Chernobyl.

You have to see if the item is a safety item or not. If it is, you go to the other image and correlate the corresponding thing. I keep getting it wrong tho :(