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?
Get 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 there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers
You Might be Interested in
The height y, in feet, of a football x seconds after it is thrown is modeled by the equation y = - 16x2 + 24x + 1.
Answers (1)
Judith went shopping with $50 and spent $45. What percentage of her money did she spend
Answers (1)
The 02.03 Mathematics Project option 1 what does it mean when it says " If each person paid an equal amount of money who would save the most? Explain your reasoning using at least two complete sentences.
Answers (1)
Acosta 10 oranges is $1 what is the cost of five dozen oranges
Answers (1)
Andrew makes $6 am hour plus $9 an hour for every hour of overtime. Overtime hours are any hours more than 40 hours for the week.
Answers (1)
New Questions in Mathematics
A right triangle with congruent legs is always a 45-45-90 triangle? True or False?
Answers (1)
What is the difference between a square and a rectangle? A) A square is a parallelogram and a rectangle is not. B) A square has 4 equal sides and a rectangle does not. C) A square has 4 right angles and a rectangle does not have to.
Answers (1)
The value of y varies directly with x, and y = - 8 when x = 2. Find y when x = 3
Answers (1)
L=3x+6 W=3x^2 what's the perimeter
Answers (1)
Dijon mustard Amount: 1 oz Unit cost: $3.29 / 6 oz jar Total cost =
Answers (1)