A sample of 75 concrete blocks had a mean mass of 38.3 kg with a standard deviation of 0.6 kg.
a) Find a 95% confidence interval for the mean mass of this type of concrete block.
b) Find a 99% confidence interval for the mean mass of this type of concrete block.
c) An engineer claims that the mean mass is between 38.2 and 38.4 kg. With what level of confidence can this statement be made?
d) How many blocks must be sampled so that a 95% confidence interval will specify the mean mass to within ±0.1 kg?
e) How many blocks must be sampled so that a 99% confidence interval will specify the mean mass to within ±0.1 kg?
Answers (1)
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “A sample of 75 concrete blocks had a mean mass of 38.3 kg with a standard deviation of 0.6 kg. a) Find a 95% confidence interval for the ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers
You Might be Interested in
What are the side lengths of a rectangle if the area is 40 sq. Ft and the perimeter is 28 ft
Answers (1)
Suppose that, and an equation with two variables, you know the value of one of the variables. Describe a method for finding the value of the other variable using the properties of equality. Give an example to illustrate your method
Answers (1)
Which is a composite number 21,43,29,37
Answers (1)
A passenger on a ship dropped his camera into the ocean. If it is descending at a rate of - 4.2 meters per second, how long until it hits the bottom of the ocean, which is at - 1,875 meters?
Answers (1)
Julie read 1/2 of a book in the morning, and she read some more at night. By the end of the day, she still had 2/5 of the book left to read. How much of the book did julie read at night?
Answers (2)
New Questions in Mathematics
Slop of (2,6) and (0,1)
Answers (2)
1.4/16 what the answer
Answers (1)
A company rents vans for a rental fee of $18.00 per day with an additional charge of $0.45 per miles that a can is driven. Write an equation the represents the cost (c) of renting a van for one day and driving (m) miles.
Answers (1)
How do you factor out the trinomial: 6x²+14x+4
Answers (1)
What will be the shape of the model for 10000
Answers (1)