Mathematics, 18.12.2020 22:20 BECKX2510

We can use the z-score to find the probability of many other events. Let's explore those now. a. Suppose that the mean time a typical American teenager spends doing homework each week is 4.2 hours. Assume the standard deviation is
0.9 hour. Assuming the variable is normally distributed, find the percentage of American teenagers who spend less than 3.5 hours doing
homework each week.
b. According to a College Board report, the population of American 2008 high school graduates had a mean Math SAT score of 515 with
standard deviation of 116. What is the probability that of a randomly selected senior from this population scoring between 500 and 800 on the
Math portion of the SAT Reasoning Test?

Answers: 3

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 15:00

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

Answers: 2

Answer

Mathematics, 21.06.2019 16:00

Which is the standard form for this number? (4 x 1 100 ) + (8 x 1 1,000 ) + ( 3 x 1 100,000 ) ? a) 0.004803 b) 0.04803 c) 0.0483 d) 0.483

Answers: 1

Answer

Mathematics, 21.06.2019 20:30

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?

Answers: 1

Answer

Mathematics, 21.06.2019 23:00

What ia the sum if the first 7 terms of the geometric series

Answers: 2

Answer

You know the right answer?

We can use the z-score to find the probability of many other events. Let's explore those now. a. Su...

Questions

Mathematics, 13.02.2020 20:24

A missile is launched from the ground. Its height, h(x) can be represented by a qyadratic function in terms of time, x, in seconds after 1 second the...

Physics, 13.02.2020 20:24

Hypothesis why would momentum not be conserved when 2 vehicles collide?...

Business, 13.02.2020 20:25

In 2022, Pina Colada Corp. had cash receipts of $61600 and cash disbursements of $35200. Pina's cash balance at December 31, 2022 was $85800. What was...

Mathematics, 13.02.2020 20:25

The activity completion time of each of the 5 critical activities of a project follows normal distribution. If the mean activity completion time of ea...

Biology, 13.02.2020 20:25

When energy leaves the Sun's core, it first moves into the . A. corona B. radiative zone C. chromosphere D. convecti...

Mathematics, 13.02.2020 20:25

A columnist described the reliability of DNA paternity testing as follows: "To get a completely accurate result, you would have to be tested, and so w...

Health, 13.02.2020 20:25

Who wants to do 3 worksheets for $10...

Business, 13.02.2020 20:25

In a local market, the monthly price of Internet access service decreases from $4040 to $3030, and the total quantity of monthly accounts across all I...

Social Studies, 13.02.2020 20:26

Before taking her calculus final, Heather reads a story about how men and women have equal abilities in math. As a result, Heather is likely to do we...

Mathematics, 13.02.2020 20:26

At an annual effective interest rate of i, the following are all equal: i) the present value of 10,000 at the end of 6 years ii) the sum...

Mathematics, 13.02.2020 20:27

Which of the following shows the sum of the number indicated on the number line above and -6

Mathematics, 13.02.2020 20:27

Is it possible to make an umbrella which is 27 inc. long lie flat on the bottom of a suitcase whose dimensions are 24 in. x 10 in. x 4 in.?...

History, 13.02.2020 20:28

Which of these was an immediate result of the Industrial Revolution in Europe? A) the trans-Atlantic Slave trade was no longer used B) mo...

Health, 13.02.2020 20:34

Michael notices that every time he gets what he calls an "adrenalin rush," his heart rate and pulse quicken and he feels a surge of energy. He also no...

Business, 13.02.2020 20:34

Book value per share: a. Is assets divided by the number of common shares outstanding. b. Is equal to par value per share. c. Reflects the value per s...

Geography, 13.02.2020 20:34

Suppose you read in the newspaper that a new planet has been found. Its average speed in orbit is 33 km/s. When it is closest to its star it moves at...

Business, 13.02.2020 20:34

Explains how elasticity and incentives work together...

Mathematics, 13.02.2020 20:34

Determine the minimum sample size required when you want to be 99% confident that the sample mean is within 0.50 units of the population mean. Assume...

French, 13.02.2020 20:35

State which French-speaking country you are visiting. State the month you are visiting. Describe what the weather is like during the seaso...

Mathematics, 13.02.2020 20:35

From the table below create an equation. 12 2 4 19 36.5 40 10 what is the right answer?...

More questions: Mathematics Another questions