<span>The correct answer is D. The number 7 is subtracted from the first term, 2x/3, but then an equal sum is added, and the two effectively cancel each other out. This means that the value of the first expression is essentially 2x/3, which is option D.</span>
I think it would be 29 students in the larger class
Answer:
The narrowest confidence interval is obtained with a sample size of 2000 and a 95% confidence interval
Step-by-step explanation:
The confidence interval is the interval
where
= the mean of the sample
<em>s = the standard deviation of the sample
</em>
<em>n = the size of the sample
</em>
<em>z is the z-score corresponding to the level of confidence
</em>
In any case, the width of the interval is 2 times , so we only need to see which value of is the smallest between the different options.
<em>The values of z can be computed either with tables or a spreadsheet.
</em>
Sample size of 1000 and a 95% confidence interval
Sample size of 1000 and a 99% confidence interval
Sample size of 2000 and a 95% confidence interval
Sample size of 2000 and a 99% confidence interval
And we see that the narrowest confidence interval is obtained with a sample size of 2000 and a 95% confidence interval
Answer:
Step-by-step explanation:
9 rings because 5+4=9
Answer:
286 mm ^2
Step-by-step explanation:
The figure is a trapezoid
The area of a trapezoid is given by
A = 1/2 ( b1+b2) *h where b1 and b2 are the lengths of the bases and h is the height
A = 1/2 ( 28+24) * 11
A = 1/2 (52)*11
A =286 mm ^2