The closest to the minimum number of consumers needed to obtain the estimate with the desired precision is (b) 271
Explanation:
When the prior estimate of population proportion is not given , then the formula to find the sample size is given by :-
where E = Margin of error.
z* = Critical z-value.
As per given , we have
E = 5%=0.05
Confidence level = 90%
The critical value of z at 90% is 1.645 (By z-table)
Put all values in the formula , we get
n=0.25(1.645/0.05)²
n=0.25(32.9)²
n=270.6025≈271
Thus, the minimum sample size needed = 271
Hence , the correct answer is 271 .
Answer with Explanation:
There are so many factors affecting the demand for a particular commodity. Four of these are: the price of the complements, the income of buyers, changes in trend and advertisements.
1. The price of the complements - Some commodities are complementary with each other, just like cars and gas. If the <em>price of cars decreases</em>, then many people will purchase their own cars, which also follows that <em>the demand for gas will increase.</em>
2. The income of buyers - If the income of a person increases, then he will most likely purchase a particular commodity because he can afford it and has an extra money to purchase goods.
3. Changes in trend - Many people purchase goods because they're on trend. For example, if flare pants are fashionable this year, then the demand for it will increase. Once they're no longer on trend, the demand will drop.
4. Advertisements - The more advertisements a company spends on, the more likely buyers will purchase a specific commodity.
Answer:
Explanation:
1)
: All group means equal or 
At least one of the treatment group means are different
ANOVA TABLE
<u>Source of Variation SS df MS F P-value F crit
</u>
Between Groups 213.5 3 71.16667 0.65 0.5975 3.490295
Within Groups 1312.5 12 109.375
MSB = SSB / DFB = 71.16667
MSE = SSE / DFE = 109.375
F = MSB / MSE = 0.650667
3) P-value: 0.597576
The test statistic is not significant and failed to reject the null hypothesis.
4) The test statistic is not significant. So, there is no evidence to conclude that there is a difference between groups.
Answer:
The correct answer is letter "D": Development of brownfields in urban areas.
Explanation:
In urban planning, sustainable development refers to continuous activities that can be performed during extended periods of time. They are the result of repeated patterns of individuals who, sometimes unconsciously, provoke more and more individuals to repeat their actions.
Under such a scenario, <em>the development of brownfields in urban areas is the result of building more department complexes in the cities because of the increasing need for renting and selling houses as a result of the increasing population growth.</em>
Employment is the act of working in exchange for an income.
Employment is a relationship between two parties,
usually based on a contract where work is paid for, where one
party, which may be a corporation, for profit, not-for-profit organization, co-operative or
other entity is the employer and the other is the employee.
