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Alex_Xolod [135]
3 years ago
11

At Central High School, 28% of the students are Freshmen, 26% are Sophomores, 24% are Juniors, and 22% are Seniors. The student

manager of the school newspaper would like to conduct a survey to estimate the proportion of each class that plans to attend the upcoming Football game. She suggests surveying a random sample of 100 students, but specifically by selecting random samples of 28 Freshmen, 26 Sophomores, 24 Juniors, and 22 Seniors. Which of the following is a true statement about this sampling procedure?a. This is simple random sample because student of every class has equal number of chances to be selectedb. This cluster random samplec. This is convenience sample as only 100 students are surveyed, which is a manageable sized. This is a stratified random sample because a separate random sample is selected from each class
Business
1 answer:
gregori [183]3 years ago
6 0

Answer:

This is a stratified random sample because a separate random sample is selected from each class

Explanation:

Stratified random sampling is an appropriate method when the population consists of mixed characteristics and you would like to ensure that every characteristic is proportionally represented in the sample. In this example, the population is the students from Central High School and the mixed characteristics are the different classes such as Freshman students, Sophomore students, Juniors and Seniors.

After the population is divided into subgroups based on characteristics, from the overall proportion of the population, you calculate how many people should be sampled in each subgroup. Random or systematic sampling can then be used to select a sample from each subgroup.

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The Federal Reserve carries out open-market operations, buying $2 million worth of Treasury Bills from banks. This action increa
klemol [59]

Answer:

67%

Explanation:

Money supply = Money multiplier * Deposit worth

3 = Money multiplier * 2

Money multiplier = 3/2

Money multiplier = 1.5

Now, Money multiplier = 1 / Reserve ratio

1.5 = 1 / Reserve ratio

Reserve ratio = 1/1.5

Reserve ratio = 0.6667

Reserve ratio = 67%

So, the percent of deposits the banks hold as reserves is 67%

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3 years ago
On the global grid the prime meridian is at ____. (1 point)
jok3333 [9.3K]
0 degrees longitude
4 0
3 years ago
What is a form of predictive analytics for marketing campaigns that attempts to identify target markets or people who could be c
Assoli18 [71]

The given statement belongs to "Uplift modelling" concept.

Explanation:

In analytical CRM Concept

Uplift modeling , customer segmentation and Website personalization are exist.

Uplift Modeling is an observational marketing method that forecasts the variance in the behaviour of consumers of a marketer's actions.

It splits the audience into groups that respond to the marketing camp against a control group based on the expected disparity.

3 0
3 years ago
Which of the following airlines does NOT employ a low-cost provider strategy? Airline 1 offers low prices on short-distance flig
Rainbow [258]

Answer:

Airline 2 offers low prices on long-distance flights and has long service times for its planes between flights.

Explanation:

Low Cost providing strategy is the strategy in which the services are provided at a lower cost and but the quality of service is acceptable, and is in fact good.

Where the price along with quality is decreased the low cost strategy is not followed.

As in the case of Airline 2 the cost is decreased for passengers and at the same time the service is also decreased.

As there is a long gap of time in between the flights.

3 0
3 years ago
A firm has estimated the following demand function for its product:
Rom4ik [11]

Answer:

(i) Q=300

(ii) Elasticity of Demand=-3.33 (elastic)

(iii) Income Elasticity= 2.5 (normal good)

(iv) Advertising Elasticity: 1.5

Explanation:

The Demand function is given by

Q=100-5P+5I+15A

(1) To solve (i) we need to replace P = 200, I = 150, and A = 30 in the demand equation:

Q=100-5(200)+5(150)+15(30)=300

(2) To find the price elasticity (how much quantity demanded changes with price) we use the point price elasticity formula

\eta_{Price}=\frac{\Delta Q}{\Delta P}\frac{P}{Q}

From the above equation we get: \frac{\Delta Q}{\Delta P}=-5

Replacing in the elasticity formula

\eta_{Price}=-5\frac{200}{300}=|-3.33|>1

in absolute terms the elasticity is bigger than one so it is an elastic demand.

(3) For income elasticity (how much quantity demanded changes with income), we proceed similarly as above. But the derivative is respect to income

\eta_{Income}=\frac{\Delta Q}{\Delta I}\frac{I}{Q}=5\frac{150}{300}=2.5>1[/tex]

Which is bigger than one, denoting this is a normal good because it's bigger than one.

(4) Advertising elasticity (how much quantity demanded changes with expenditures in advertising), we proceed as before

\eta_{advertising}=\frac{\Delta Q}{\Delta A}\frac{A}{Q}=15\frac{30}{300}=1.5

3 0
3 years ago
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