![harleymustangs4992](/avatars/11774.jpg)
harleymustangs4992
24.07.2019 •
Mathematics
Jim tree sells trees. the mean length of the trees purchased was 68 inches with a standard deviation of 10 inches. jim wants to know what percent of his sales were more than 84 inches tall. he can use the standard normal distribution to him. he asks, "what is the mean? " mean = inches. he thinks, "what is the expected distribution about the mean? " ( 38 inches 48 inches 58 inches 68 inches 78 inches 88 inches 98 inches. ) he thinks, " % of the sales will be below 68 inches." but, he needs to know the percentage between 68 and 84 to add to that.so, he calculates a z-score = = , and finds the percentage associated with 1.6 in the table. this is (to the nearest tenth) %. now jim knows that % of his sales were 84 inches or less. therefore, the remaining % were more than 84 inches.
Solved
Show answers
More tips
- 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?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
Answers on questions: Mathematics
- M Mathematics Explain why a rectangular prism composed of two unit cubes has 6 faces how do its dimensions compare to a unit cube...
- M Mathematics Determine the equation of the line shown in the graph: 3O POINTS PLS HELP ASAP! graph of a vertical line with an x intercept of negative 1 y = −1 y = 0 x = −1 x = 0...
- M Mathematics Together, teammates Pedro and Ricky got 2675 base hits last season. Pedro had 279 more hits than Ricky. How many hits did each player have?...
- H History Which of the following was not a part of Sam Houston’s cabinet? a. Secretary of State b. Secretary of War c. Secretary of Treasury d. Secretary of the President...
- M Mathematics 7 군 3.) A police officer recorded the speeds, in miles per hout, of 1 cars that passed by on a highw are shown in the line plot below. x x X X Х X X X x x x x x x x Х + ++ ++ 50...
- E English Which of the following statements match with your opinions about telling the truth versus telling a lie? Check any that apply •It is never okay to tell even small lies •It is okay...
- B Business How can we start a business...
Ответ:
He asks, "what is the mean?" Mean = 68 inches.
He thinks, "What is the expected distribution about the mean?" ( 38 inches 48 inches 58 inches 68 inches 78 inches 88 inches 98 inches.)
He thinks, " 50% of the sales will be below 68 inches."
But, he needs to know the percentage between 68 and 84 to add to that. So, he calculates a z-score
z-score=(x-mean)/(standard deviation)=(84-68)/10=16/10
z-score=1.6
and finds the percentage associated with 1.6 in the table.
0.35543=0.35543*100%=35.543%=35.5%
This is (to the nearest tenth) 35.5%.
Now Jim knows that 50%+35.5%=85.5% of his sales were 84 inches or less.
Therefore, the remaining 100%-85.5%=14.5% were more than 84 inches.
Ответ: