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ICE Princess25 [194]
2 years ago
9

In one city, 75 percent of residents report that they regularly recycle. In a second city, 90 percent of residents report that t

hey regularly recycle. Simple random samples of 75 residents are selected from each city. Which of the following statements is correct about the approximate normality of the sampling distribution of the difference in sample proportions of residents who report that they regularly recycle?
Advanced Placement (AP)
2 answers:
natulia [17]2 years ago
7 0

Answer:

B

Explanation:

Since this is for proportions, you should use the np greater than or equal to 10 and n(1-p) greater than or equal to 10, not the Central Limit theorem. Using math, we can deduce that 0.25(75) is greater than 10 while 0.1(75) is not greater than 10. Therefore, the answer is that city one's population is big enough while city two's population is too small. I got those numbers by 1-0.9 and 1-0.75 (You usually want to test the smallest values to see if they exceed 10, it's the fastest way to find holes on a problem).

docker41 [41]2 years ago
6 0

Answer:

The sampling distribution is approximately normal because both sample sizes are large enough.

Explanation:

The Central Limit Theorem states that a sample of 40 or more makes for a normal distribution regardless of shape.

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Explanation:

7 0
2 years ago
What is the net charge of two ions bonded together ?
makvit [3.9K]

the net charge of an ion is non-zero due to its total number of electrons being unequal to its total number of protons.

4 0
2 years ago
Because factories were usually located in cities, industrialization went hand-in-hand with –. The industrial economy helped crea
Wittaler [7]

Answer:

Because factories were usually located in cities, industrialization went hand-in-hand with – urbanization. The industrial economy helped create robust growth in the United States for many decades. Plentiful manufacturing and industrial jobs meant that –workers could enter the job market making a good wage. But as the economy began to transform once more, from an industrial to a post-industrial system, the nature of work changed as well. –This led to a decline in industrial jobs: from 18 million in 1990 to –12.4 million by 2017.

Explanation:

a) Industrialization: This term refers to the development of industries, which is characterized by economic growth, more efficient division of labor, mass production, and the use of technological innovations to solve problems.  Industrialization was triggered by the evolution of capitalism and the agricultural revolution.

b) Urbanization: Is the outcome of a process that see the movement of the population from rural areas to towns and cities.  It is usually caused by industrial growth, availability of employment and social amenities, commercialization of activities, modernization, etc.

c) Industrial Economy: This is an economy characterized by the building of industries, where the factors of production are no longer limited to land, labor, capital, and natural resources, but include the use of technology and knowledge.

d) Post-Industrial System: Post-industrial system is an economic system of the period within an industrialized economy or nation witnessing a declining manufacturing sector and increasing activities in services, information, and research, resulting to de-industrialization.

5 0
2 years ago
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Jet001 [13]

Answer:

The mean is 35.22, and the standard deviation is 9.52.

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2 years ago
The 5 digit number 5abc9 is the square of an integer where a, b, and c represent a missing digit. If all five digits are differe
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54289 = 233^2

You know the last digit of the squared number is 3 or 7, so just try numbers ending with those from 220 to 250

4 0
2 years ago
Read 2 more answers
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