Answer:
d. It would become narrower
Step-by-step explanation:
The width of a normal confidence interval is given by:
![W = z*\frac{\sigma}{\sqrt{n}}](https://tex.z-dn.net/?f=W%20%3D%20z%2A%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D)
In which z is the critical value according to the confidence level,
is the standard deviation of the population and n is the size of the sample.
W and n are inverse proportional, that is, as n(the sample size) increases, W(the width of the interval) decreases, that is, the interval becomes narrower..
So the correct answer is:
d. It would become narrower
Since we know a triangle only has 180 degrees we can say:
99+3x+x+5=180
Then we can solve for x:
4x+104=180
4x=76
x=19
Stem (hundred thousands) Leaf (ten thousands) 0 667778999 1 02447778889999 2 0011234445667889 3 00011227
The stem-and-leaf plot above shows house sale prices over the last week in Tacoma. What was the most expensive house sold? Give your answer in dollars
Answer:
$370,000
Step-by-step explanation:
Given the stem and leaf plot :
Stem__Leaf
0_____667778999
1_____ 02447778889999
2_____0011234445667889
3_____00011227
The stem is represented in units of hundred thousand and the leaf in ten thousand. Therefore from the plot above, the most expensive house will be the one with both the highest hundred thousand and ten thousand placed value.
300,000(stem) + 70,000(leaf) = 370,000
Answer:
x < -7
Step-by-step explanation:
An inequality is solved similar to an equation with the exception that when multiplying or dividing by a negative coefficient, the sign must flip in the other direction. The original inequality is:
-6x > 42
To solve, you need to divide both sides of the inequality by -6, however, since you are dividing by a negative coefficient, the sign need to flip the other way:
-6x/-6 > 42/-6 = x < -7