Answer: a) Unimodal and symmetric
b) 0.26
c) 0.038
Step-by-step explanation:
Given: Sample size of investors (n)= 131
True proportion of smartphone users(p) =26%
a) Since sampling distribution for the sample proportion is approximately normal when n is larger.
Normal distribution is Unimodal and symmetric.
So correct option : Unimodal and symmetric
b) mean of this sampling distribution = p = 0.26
c) standard deviation of the samplingdistribution = 
The answer is D
You need to make at least $200 so that is greater then or = to. You subtract 92 from 200 which gives you 108. From there you take 108/4 which is 27
<span><span>3+<span>xx</span></span>=19 </span>
<span /><span><span><span>x2</span>+3</span>=19 </span>
<span /><span>x2+3−3=<span>19 </span></span>
<span><span>−3</span></span><span><span><span><span><span>x2</span>=16</span></span></span></span>
<span><span><span><span /><span>x=<span>±<span>√16</span></span></span></span></span></span>
<span><span><span><span><span><span /></span></span></span></span></span>x = <span><span><span><span>4</span> or </span></span>x </span>= <span>−<span>4</span></span>
X=3 and y=x^2 intersect at (3,9), so your bounds are y=4 and y=9 and and . , so you use the disk method therefore you have to switch variables (even though x^2 is not invertible, because you only need the right side you can use y^(1/2)) so pi*integral( 3^2- (y^(1/2))^2 dy) making it pi*[9y-(1/2)y^2]|y=(4,9) , pi*[25/2]
Answer:
B) 
Step-by-step explanation:
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