Ahospital emergency room has collected a sample of n = 55 to estimate the mean number of visits per day. it has found the standard deviation is 15. using a 95 percent confidence level, what is its margin of error?

Step-by-step explanation:

Using this table, the critical value for the 90% confidence level is 1.645 (note: look in the row that starts with infinity and look for the value above 90%)

So z = 1.645

Given Information:

n = 40

s = 32

A hospital emergency room has collected a sample of n = 40 to estimate the mean number of visits per day. It has found the standard deviation is 32. Using a 90 percent confidence level, what is its margin of error?

sample mean:: x-bar = 40

ME = 1.645(32/sqrt(40)) = 8.32

the reporter's right

step-by-step explanation:

1/4 = .25 / 25%

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.