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Mathematics, 09.04.2020 06:51 michael1295
I REALLY NEED HELP ASAP NEEDS TO BE TURNED IN TONIGHT
I REALLY NEED HELP PLEASE
1)The weights of adult male birds of a certain species are normally distributed with a mean of 27.5 grams and a standard deviation of 1.1 grams.
What is the z-score of a male bird of this species with a weight of 29.37 grams?
2)The lengths of spools of ribbon are normally distributed with a mean of 91.4 centimeters and a standard deviation of 1.3 centimeters.
What is the length of a spool of ribbon with a z-score of 0.7?
Enter your answer, rounded to the nearest tenth, in the box.
3)The time it takes people to fill out a medical form is normally distributed with a mean of 8 minutes and a standard deviation of 2 minutes.
Approximately what percent of people take between 2 and 14 minutes to fill out the medical form?
50%
68%
95%
99.7%
4)
Item 4
Use technology or a z-score table to answer the question.
The speed of automobiles at one spot on a highway is normally distributed with a mean of 60 miles per hour and a standard deviation of 5.2 miles per hour.
Approximately what percent of automobiles at that location are traveling between 50 and 65 miles per hour?
2.7%
16.8%
80.4%
83.2%
5)
Item 5
Use technology or a z-score table to answer the question.
The normal admission price to see a movie at different theaters is normally distributed with a mean of $11.80 and a standard deviation of $1.15.
Approximately what percent of theaters charge more than $10 to see the movie?
5.8%
19.8%
80.2%
94.2%
6)The weights of pears in an orchard are normally distributed with a mean of 170 grams and a standard deviation of 24 grams.
What is the weight of a pear in the orchard with a z-score of −2.8 ?
Enter your answer in the box.
grams
7)The number of words per page in a certain book is normally distributed with a mean of 340 words and a standard deviation of 20 words.
Approximately what percent of pages in the book are less than 360 words in length?
16%
34%
68%
84%
8)Select Yes or No to state whether each data set is likely to be normally distributed.
Data Set Yes No
the number of coupons used at a supermarket
the weights of the pumpkins that are delivered to a supermarket
the number of raisins in each 8-oz box of raisins at a supermarket
the amount of time customers spend waiting in the checkout line at a supermarket
9)The masses of the oranges on sale at a farm stand are normally distributed with a mean of 239 grams and a standard deviation of 25 grams.
Enter the z-score of an orange that has a mass of 259 grams.
10)The times it takes runners to complete a certain marathon are normally distributed with a mean of 4.6 hours and a standard deviation of 1.1 hours.
What is the time for a runner with a z-score of −1.2 ?
Enter your answer, rounded to the nearest hundredth, in the box
11)Use technology or a z-distribution table to find the indicated area.
The masses of the eggs collected on a farm are normally distributed with a mean of 55 grams and a standard deviation of 4.2 grams.
Approximately 80% of the eggs on the farm have a mass greater than which mass?
51.5 g
54.1 g
55.8 g
58.5 g
12)Use technology or a z-score table to answer the question.
The weights of boxes of rice produced at a factory are normally distributed with a mean of 24 ounces and a standard deviation of 1.3 ounces. Consider a shipment of 1200 boxes of rice.
How many of the boxes will weigh 25 ounces or less?
192
265
935
1008
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