Answer:
And we can conclude that the true mean for the scores are given by this interval (28.37; 30.63) at 90% of confidence
Step-by-step explanation:
Information given
represent the sample mean
population mean
s= 5.2 represent the sample standard deviation
n=59 represent the sample size
Confidence interval
The confidence interval for the true mean is given by the following formula:
(1)
The degrees of freedom are given by:
The Confidence interval is 0.90 or 90%, the significance is
and
, and the critical value is
Now we have everything in order to replace into formula (1):
And we can conclude that the true mean for the scores are given by this interval (28.37; 30.63) at 90% of confidence
Answer:
The value of given expression is 19.
Step-by-step explanation:
The given expression is

According to the rule of BODMAS the order of operations is Bracket, Of, Division, Multiplication, Addition and Subtraction.
First we have to simplify the value of bracket.


Therefore the value of given expression is 19.
It can help you by checking your answer
Answer:
f (x) = 4,500 + 250x; 24 months
Step-by-step explanation:
Because 10,500 - 4,500 = 6,000
6,000 / 250 = 24
Hope this helped
Answer: HK
Step-by-step explanation: