Mathematics, 15.04.2020 19:03, missinghalloween13
PLEASE PAY SPECIAL ATTENTION TO THE AMOUNT OF DECIMAL PLACES ANSWERS NEED TO BE ROUNDED TO.
Power +, Inc. produces AA batteries used in remote-controlled toy cars. The mean life of these batteries follows the normal probability distribution with a mean of 37 hours. hours and a standard deviation of 5.1 hours. As a part of its quality assurance program, Power +, Inc. tests samples of 9 batteries.
a. What can you say about the shape of the distribution of the sample mean?
Sample mean (Click to select)NormalUniformBinomial
b.
What is the standard error of the distribution of the sample mean? (Round your answer to 4 decimal places.)
Standard error
c.
What proportion of the samples will have a mean useful life of more than 38 hours? (Round z value to 2 decimal places and final answer to 4 decimal places.)
Probability
d.
What proportion of the sample will have a mean useful life greater than 35.5 hours? (Round z value to 2 decimal places and final answer to 4 decimal places.)
Probability
e.
What proportion of the sample will have a mean useful life between 35.5 and 38 hours? (Round z value to 2 decimal places and final answer to 4 decimal places.)
Probability
Answers: 2
Other questions on the subject: Mathematics
Mathematics, 21.06.2019 16:10, michaelwthms
To describe a sequence of transformations that maps triangle abc onto triangle a"b"c", a student starts with a reflection over the x-axis. how should the student complete the sequence of transformations to map triangle abc onto triangle a"b"c"? plz
Answers: 1
Mathematics, 21.06.2019 17:00, vaelriacb9300
The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?
Answers: 2
Mathematics, 21.06.2019 19:10, madimocaj
Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?
Answers: 2
Mathematics, 21.06.2019 21:30, amesha62
In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?
Answers: 1
Do you know the correct answer?
PLEASE PAY SPECIAL ATTENTION TO THE AMOUNT OF DECIMAL PLACES ANSWERS NEED TO BE ROUNDED TO.
Questions in other subjects:
English, 28.07.2019 04:00
Mathematics, 28.07.2019 04:00
English, 28.07.2019 04:00
