In a random sample of six mobile devices, the mean
repair cost was $60.00 and the...
In a random sample of six mobile devices, the mean
repair cost was $60.00 and the standard deviation was $12.50.
Assume the population is normally distributed and use a
t-distribution to find the margin of error and construct a 99%
confidence interval for the population mean. Interpret the
results.
The 99% confidence interval for the population μ is (_, _)
The following is a sample of sanitation scores for 20
cruise ships.
97, 88, 81, 87,...
The following is a sample of sanitation scores for 20
cruise ships.
97, 88, 81, 87, 90, 89, 82, 88, 92, 92, 86, 82, 99, 86, 93, 82,
94, 90, 89, 92
A) Find the mean and standard deviation of the
sanitation scores.
x = _____
S = _____
B) Calculate the intervals x̅ ± s , x̅
± 2s, x̅ ± 3s :
x̅ ± s = ( ___ , ___ )
x̅ ± 2s = ( ___ ,...