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irina [24]
3 years ago
14

A study is done to determine the average salary for all Santa Clara County teachers. If we were to randomly pick 15 schools in S

anta Clara County and average together the salaries of all teachers, would this be a good sampling technique or a bad sampling technique
Mathematics
1 answer:
erma4kov [3.2K]3 years ago
4 0

Answer:

Good sampling technique

Step-by-step explanation:

In other to determine the mean value for a population, it may be necessary to make inference from the a small subset of the population, called the sample, if it is impossible, difficult or inefficient to get all population data. Hence, in other to select a subset of the population, then the sample must be selected at random, such that all elements of the population have equal chances of being selected and hence, be representative of the population. Since, the sampling technique adopted above is done at random, hence, it is a good sampling technique.

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What is the value of x?<br><br> x = ___
Shalnov [3]

Answer:

x = 24

Step-by-step explanation:

The triangle is split into two similar triangles. They have the same shape but not the same size. To solve, write a proportion.

\frac{56}{44.8}=\frac{35}{x+4}

Cross multiply to solve for x.

56(x+4) = 44.8(35)

56x + 224 = 1,568

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(b) What portion of the official U.S. poverty threshold (roughly $29,000 for a family of four) is met by the World Bank’s measur
otez555 [7]
World Bank's threshold for poverty is $1.25 per person per day. 
For a family of four this gives:
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The poverty threshold measured by World Bank is 6.29% of the U.S. poverty threshold.
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