Mathematics, 26.02.2020 00:56 tiekert

You plan to conduct a survey to find what proportion of the workforce has two or more jobs. You decide on the 98% confidence level and a margin of error of 2%. A pilot survey reveals that 7 of the 50 sampled hold two or more jobs.
1. How many in the workforce should be interviewed to meet your requirement?

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Answer from: egyptforrest9892

1635 people

Step-by-step explanation:

The proportion of people with two or more jobs in the sample is

7/50 = 0.14

The z-value that gives us a 98% confidence level is 2.33 (this means that 98% of the area under the normal curve N(0;1) is between -2.33 and 2.33)

If we use Simple Random sampling, the size of the sample should be

$n=\displaystyle\frac{z^2p(1-p)}{e^2}$

where z is the z-value which gives us the desired confidence level, p the proportion and e the error. In our case

z = 2.33

p = 0.14

e = 2% = 0.02

So, the sample size should be

$n=\displaystyle\frac{(2.33)^2*0.14*0.86}{(0.02)^2}=1634.0989\approx 1635$

rounding up to the nearest integer.

Answer from: Quest

4.6875 pounds

step-by-step explanation:

Iam also having trouble with this one too pls belp

Answer from: Quest

"it's not the heat, it's the humidity". that's a partly valid phrase you may have heard in the summer, but it's actually both. the heat index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature. this has important considerations for the human body's comfort. when the body gets too hot, it begins to perspire or sweat to cool itself off. if the perspiration is not able to evaporate, the body cannot regulate its temperature. evaporation is a cooling process. when perspiration is evaporated off the body, it effectively reduces the body's temperature. when the atmospheric moisture content (i.e. relative humidity) is high, the rate of perspiration from the body decreases. in other words, the human body feels warmer in humid conditions. the opposite is true when the relative humidity decreases because the rate of perspiration increases. the body actually feels cooler in arid conditions. there is direct relationship between the air temperature and relative humidity and the heat index, meaning as the air temperature and relative humidity increase (decrease), the heat index increases (decreases).

step-by-step explanation:

75% of the temperatures are below what value? how do you know? 75% of the temperatures are above w

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