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Question:
How large of a sample of state employees should be taken if we want to estimate with 98% confidence the mean salary to be within $2,000? The population standard deviation is assumed to be $10,500. z-value for 98% confidence level is 2.326.
Answer:
Sample size = n = 150
Step-by-step explanation:
Recall that the margin of error is given by
Re-arranging for the sample size (n)
Where z is the value of z-score corresponding to the 98% confidence level.
Since we want mean salary to be within $2,000, therefore, the margin of error is 2,000.
The z-score for a 98% confidence level is 2.326
So the required sample size is
Therefore, we need to take a sample size of at least 150 state employees to estimate with 98% confidence the mean salary to be within $2,000.
Answer:
The number of 1/5 liter glasses that Lin can fill is
Step-by-step explanation:
we know that
To find out how many 1/5 liter glasses can Lin fill with a 1 1/2 liter bottle of water, divided 1 1/2 by 1/5
so
Convert mixed number to an improper fraction
substitute
Multiply in cross
Convert to mixed number
A quadrilateral simply means a shape that has 4 straight sides. Imagine a square or rectangle - they are both quadrilaterals.
550 is the answer to the math problem
Answer:
There are 4 cards and you chose one. Your percentage of picking the right one would be 25%. 100/4=25.