April wants to borrow $200 from her father and is willing to pay $9 in Interest. Her father wants to charge an interest rate of
1 answer:
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to get the LCD we should start by doing a quick prime factoring of each denominator, as you see in the picture below.
the factors in red are the common factors to all values, and they are used in the LCD only once, the other not common factors in blue, they're used in the LCD.
Answer:
And the 95% confidence would be :
Step-by-step explanation:
We have the following info given from the problem
sample mean for this year
sample deviation for this year
random sample selected for this year
sample mean for last year
sample deviation for last year
random sample selected for last year
And we want to construct a 95% confidence interval estimate of the difference μ1−μ2, where μ1 is the mean of this year's sales and μ2 is the mean of last year's sales
For this case the formula that we need to use is:
The degrees of freedom are given by:
The confidence level is 0.95 and the significance would be and
so then the critical value for this case is :
The margin of error would be:
And the confidence interval would be given by:
And the 95% confidence would be :