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Verizon [17]
2 years ago
13

According to a recent study, US adults spent on average 29 hours per month using the PC internet. The time spent on the PC inter

net follows a normal distribution with mean 29 hours per month and standard deviation 12 hours per month.What percent of US adults spend above 29 hours per month on PC internet? g
Mathematics
1 answer:
Andrei [34K]2 years ago
5 0

Answer: The percent of US adults spend above 29 hours per month on PC internet = 50%

Step-by-step explanation:

Given: , US adults spent on average 29 hours per month using the PC internet.

As the me spent on the PC internet follows a normal distribution.

And there is 50% of the population lies above the mean and below the mean.

Then, the percent of US adults spend above 29 hours per month on PC internet = 50%

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Answer:

5 cats

Step-by-step explanation:

  d/c = 5/1

    d = 25      Substitute in the proportion

25/c = 5/1     Multiply both sides by c

  25 = 5c/1

  25 = 5c      Divide each side by 5

    c = 5

There are five cats.

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2 years ago
Round 0.9998 to 3 decimal places
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2 years ago
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In 2000, the mayo clinic conducted a study of whether air dryers eliminate more germs than paper towels. researchers recruited 1
WARRIOR [948]

Answer:

This is an observational study based on a stratified sample.

Step-by-step explanation:

This study aimed to check which clean-up/drying up method after handwashing was more effective; that is, do dryers eliminate more germs than paper towels.

It involved 100 people that took part in the study. The 100 of them contaminated their hands and were instructed to wash their hands with soap and water for 15 seconds before the participants are randomly grouped into two strata; one stratum/group (consisting of 50 participants) that dries their hands with a dryer and another (also consisting of 50 participants) that dry their hands with paper towels.

An observational study is one in which data is collected only by monitoring the events of the study. The conductor of the study in no way tries to intervene or control any of the variables being studied. No control, no tweaking of factors, just observe and record data.

An observational study based on a stratified sample is an observational study that uses the stratified sampling method to carry out its objectives. It randomly puts each of the participants being observed into groups or strata. Each group of randomly assigned participants are then required to run the test for one of the variables being compared.

This is exactly what the study in the question describes. This is why this study is undoubtedly an observational study based on a stratified sample.

Hope this Helps!!!

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3 years ago
Massimo spent $90. riding the bus. Each bus ride cost $2.50. Write and solve an equation to determine how many times Massimo rod
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$90 ÷ $2.50 = 36

Massimo rode the bus 36 times.


Please mark brainliest. Have a great day!

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3 years ago
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