Fifty students are going on a field trip. Twenty of the students are boys. What percent of the students are girls?
2 answers:
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Answer:
Now we just take square root on both sides of the interval and we got:
Step-by-step explanation:
Information given
represent the sample mean
population mean (variable of interest)
s=2.4 represent the sample standard deviation
n=83 represent the sample size
Confidence interval
The confidence interval for the population variance is given by the following formula:
The degrees of freedom given by:
The confidence level is 0.90 or 90%, the value of and
, and we can use excel, a calculator or a table to find the critical values.
The excel commands would be: "=CHISQ.INV(0.05,82)" "=CHISQ.INV(0.95,82)". so for this case the critical values are:
The confidence interval is given by:
Now we just take square root on both sides of the interval and we got:
Explanation:
First we write the fraction as a decimal. 5/8 is 0.625, so the height of Jill is 48.625 inches.
The difference is:
Answer:
c. 1.125 inches
Answer:
Domain = R- {0,4}
Step-by-step explanation:
In order to function (f*g)x to be defined , the Denominator must not be equal to zero.
Hence
x ≠ 0
(x-4) ≠ 0 ⇒ x≠4
Hence (f*g)x is defined for all values of x except 0 and 4
Hence Domain = R- {0,4}