Answer: all real numbers
Step-by-step explanation:
Answer:
The 95% confidence interval for the difference is (-0.1888, 0.0202).
Step-by-step explanation:
Difference between proportions:
The distribution of the difference between two proportions has mean of the difference between these proportions and standard deviation is the square root of the sum of the variances. So
In a sample of 86 units made with gold wire, 68 met the specification
This means that:


In a sample of 120 units made with aluminum wire, 105 met the specification.
This means that:


Difference:


Confidence interval:

In which z is the zscore that has a pvalue of
, with
being 1 subtracted by the confidence level.
95% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
Lower bound of the interval:

Upper bound of the interval:

The 95% confidence interval for the difference is (-0.1888, 0.0202).
Answer:
Solution given:
volume of pyramid =⅓area of base×height
=⅓*1*1*1=⅓=0.33yd³
<u>the volume of the pyramid</u>
<u>the volume of the pyramid0.33yd³</u>
<span>This question tells us that after every three squares, we will place a cork square. So there are 3 normal squares for every cork square. We are also told that there are a total of 12 squares. If we divide the total squares by the number of normal squares for every cork square, we obtain the number of cork squares. 12 / 3 = 4. So there are 4 cork squares.</span>