ulilliareinhart2
16.07.2019 •
Mathematics
What is the sum or difference? 6c^8 - 8c^8
Solved
Show answers
More tips
- S Science and Technology How to Restore the Diamond Shine to Your Tarnished Silverware...
- C Computers and Internet Boost your processor performance with these easy tips...
- L Leisure and Entertainment When will Maslenitsa start?...
- F Food and Cooking Discovering the Mysterious Fruit of Feijoa...
- B Business and Finance How to Open an Online Store? A Detailed Guide for Beginners...
- W Work and Career How to Write a Resume That Catches the Employer s Attention?...
- C Computers and Internet Е-head: How it Simplifies Life for Users?...
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- F Family and Home Parquet or laminate, which is better?...
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
Answers on questions: Mathematics
- M Mathematics Please solve this i want to go to my dads house but i have homework...
- E English How did the jewish religion survive during the exile of the jewsenter your question...
- S Spanish Write the sentence stating the time displayed....
- E English 3. What does Raymond do during the race? What do his actions suggest to Squeaky?...
Ответ:
Ответ:
Ответ:
a) The average weight is 199 pounds.
b) The probability that the maximum safe weight will be exceeded is 0.4840 = 48.40%.
c) The probability that the maximum safe weight will be exceeded is 0.3539 = 35.39%.
Step-by-step explanation:
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean and standard deviation , the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
(a) If 56 people are on the elevator, and their total weight is 11,144 pounds, what is their average weight?
This is 11144 divided by 56, that is 11144/56 = 199 pounds.
Their average weight is 199 pounds.
(b) If a random sample of 56 adult men ride the elevator, what is the probability that the maximum safe weight will be exceeded?
The weights of adult U.S. men have mean 196 pounds and standard deviation 71 pounds, which means that
11144 pounds is an average of 199 pounds, so this probability is 1 subtracted by the pvalue of Z when X = 199.
has a pvalue of 0.5160
1 - 0.5160 = 0.4840
The probability that the maximum safe weight will be exceeded is 0.4840 = 48.40%.
(c) If a random sample of 56 adult women ride the elevator, what is the probability that the maximum safe weight will be exceeded?
The weights of adult U.S. women have mean 169 pounds and standard deviation 80 pounds, which means that
11144 pounds is an average of 199 pounds, so this probability is 1 subtracted by the pvalue of Z when X = 199.
has a pvalue of 0.6461
1 - 0.6461 = 0.3539
The probability that the maximum safe weight will be exceeded is 0.3539 = 35.39%.