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lys-0071 [83]
3 years ago
7

A random sample of 81 automobiles traveling on a section of an interstate showed an average speed of 60 mph. The distribution of

speeds of all cars on this section of highway is normally distributed, with a standard deviation of 13.5 mph. Refer to Exhibit A. If we are interested in determining an interval estimate for μ at 86.9% confidence, the z value to use is _____.
a. 1.96
b. 1.31
c. 1.51
d. 2.00
Business
1 answer:
rjkz [21]3 years ago
4 0

Answer:

so correct option is c. 1.51

Explanation:

given data

random sample n = 81

average speed x = 60 mph

standard deviation σ = 13.5 mph

interval estimate  μ =  86.9%

to find out

the value of the z

solution

we have given  μ =  86.9%

so we get here z critical value for the confidence level =  86.9 %

we will use here standard normal table

so z value for 86.9% is 1.51

so correct option is c. 1.51

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Suppose the European Parliament is considering legislation that will decrease tariffs on agricultural products imported from the
VMariaS [17]

Answer:

€2,500 million

Explanation:

Data provided as per the requirement of estimated benefit to the population is here below:-

Benefit of the tariff reduction = €5

Size of population = €500 million

The computation of estimated benefit to the population is shown below:-

Estimated benefit to the population = Benefit from tariff reduction × Size of population

= €5 × €500 million

= €2,500 million

Therefore for computing the estimated benefit to the population we simply applied the above formula.

4 0
3 years ago
You take out a loan for $100,000 at an annual interest rate of 5.9% that is to be paid with three equal annual payments of $37,3
Hunter-Best [27]

Answer:

The principal repaid in the second year will be $33,296.

Explanation:

Out of each 37,341.79 payment a part of it will be principal repayment and a part of it will be interest payment. When the first 100,000 is paid (0.059*100,000)=5,900 is interest and (37,341-5,900)= 31,441 is principal repayment which means, that in the second year the principal remaining is (100,000-31,441)=68,559. So the interest payment in the second year will be (0.059*68,559)=4,045 and the principal repaid will be (37,341-4,045)=33,296.

8 0
3 years ago
International trade has always played a role in the U.S. economy. Is this role increasing or decreasing (in terms of exports and
Arturiano [62]

Answer: Option (F)

Explanation:

International trade tends to allow nations to expand their respective markets for commodities, goods and services which otherwise wouldn't have been available. As the outcome of the international trade, market tends to contain the greater competition, thus indirectly tends to have competitive prices, that further brings cheaper commodities home to consumer.

The vital point under this scenario is that within the past decade due to technological transformation the cost of communication has decreased drastically and thus has always impacted International trade.

8 0
3 years ago
Tammy just moved to an area that will soon get cold. She owns some sweaters, but she is not fond of them. She also does not own
Natalka [10]
Her needs must be met before her wants.
3 0
3 years ago
A bank loan has been given to a customer at a bank with a FIXED nominal interest rate of 13%. The real
dmitriy555 [2]

Answer:

The new real interest rate is 15%

and the lender was hurt.

O 15%; lender

Explanation:

a) Data and Calculations:

Fixed nominal interest rate = 13%

Real interest rate for the bank's profit margin = 10%

Inflation rate = 3% (13% - 10%)

Unanticipated inflation rate = 7%

Nominal interest rate = 17% (10% + 7%)

But the bank could not increase its fixed nominal interest rate to match the nominal interest rate.

6 0
3 years ago
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