Answer:
A. 0.3204 B. $14.669
Explanation:
Mean = 8.9 SD = 4.5
Required probability = P (X >/= 550/50)
P(X>/=11) = 1 - P[(X - mean/SD) < (11 - mean)/SD]
= 1 - P(Z < (11-8.9)/4.5)
P(X>/=11) = 1 - P(Z < 0.4666667)
Using Excel NORMDIST(0.4666667,0,1,1)
P(X>/=11) = 1 - 0.6796 = 0.3204
The probability that she will earn at least $550 = 0.3204
b. P
(
X > x
) = 0.10
1 − P
(
X − mean)/SD ≤ (x − mean)
/SD = 0.10
P
(
Z ≤ z
) = 0.90
Where,
z = (x − mean
)/SD
Excel function for the value of z:
=NORMSINV(0.9)
=1.282
Hence (x - mean)/SD = 1.282
= (x - 8.9)/4.5 = 1.282
x = (1.282*4.5) + 8.9
x = 14.669
He earns $14.669 on the best 10% of such weekends.
Answer:
A disadvantage of the corporate form of business entity is corporations are subject to more governmental regulations.
Answer:
it's known as a margin call.
Explanation:
Buying on margin is borrowing money from a broker in order to purchase stock. Margin trading allows you to buy more stock than you'd be able to normally.
Yes. Roberey can include fake money.
Answer: -29.75% to 52.33%
Explanation:
Given the Average return and the standard deviation, the range that is to be expected 95% of the time can be calculated by;
Upper bound = Average + (2 * standard deviation)
Lower Bound = Average - (2 * standard deviation)
Upper bound = 11.29% + (2 * 20.52%)
= 11.29% + 41.04%
= 52.33%
Lower bound = 11.29% - (2 * 20.52%)
= 11.29% - 41.04%
= -29.75%
The range is, -29.75% to 52.33%
