<u>Solution and Explanation:</u>
a) 51% of users of mobile phones use their phone at least once per hour,
It is a binomial distribution with n = 150, p = 0.51
mean = np = 150 multiply with 0.51 = 76.5
SD= sqrt(np(1-p) )= 6.1225
Since np and n(1-p) > 5, we can assume the distribution is normal.
B) please see the attached file.
c) It is a binomial distribution with n = 150, p = 0.02
mean = np = 150*0.02 = 3
SD= sqrt(np(1-p) )= 1.71464
Since np < 5, we cannot assume the distribution is normal.
Answer: Option (D) is correct.
Explanation:
The economic efficiency is achieved at a point where demand curve and supply curve intersects each other. This point is known as market equilibrium. The area under the demand curve and above the equilibrium price level is known as consumer surplus.
The area above the supply curve and under the equilibrium price level is known as producer surplus.
Hence, the combine area of consumer surplus and producer surplus have to maximized to have a economic efficiency in an economy.
Answer is : legal title
The factor which determines whether or not goods should be included in a physical count of inventory is:
a. legal title.
b. whether or not the purchase price has been paid.
c. management's judgment.
d. physical possession.
a. legal title
Answer:
$386,080
Explanation:
In order to find the Coverage of sally's investment in life insurance for 10year can be done by making 10-year table
Year Cashflow Discount factorI5%) Present Value
$ $ $
1 50,000 0.9524 47,620
2 50,000 0.9070 45,350
3 50,000 0.8638 43,190
4 50,000 0.8337 41,135
5 50,000 0.7835 39,175
6 50,000 0.7462 37,310
7 50,000 0.7107 35,535
8 50,000 0.6768 33,840
9 50,000 0.6446 32,230
10 50,000 0.6139 30,695
NPV = Sum of all present values
NPV = $386,080
Free riders are those who gain from a thing without contributing to its manufacturing expenses.
<h3>When the creation of a thing incurs external expenses, the?</h3>
- An external cost occurs when the production or use of a goods or service imposes a cost (negative effect) on a third party.
- If a good has external costs connected with it (negative externalities), the social costs will be larger than the private cost.
- Market failure may occur in the presence of external expenses. This is because the free market frequently ignores the existence of external expenses.
- The cost to a third party of consuming/producing one more unit is known as the external marginal cost (XMC).
learn more about external costs refer:
brainly.com/question/14203073
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