Jon S.

From the top of a 229-ft lighthouse, the angle of depression to a ship in the ocean is 24 degrees How far is the ship from the base of the lighthouse? To measure the height of the cloud cover at... more

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Statistics

07/03/20

Hypothesis Testing

A drug company claims that an allergy medication causes headaches in 5% of those who take it. Amedical researcher believes that more than 5% of those who take the drug actually get... more

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Statistics

07/03/20

population proportion

Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval for a sample of size 313 with 69% successes. Enter your answer as an open-interval (i.e.,... more

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Statistics

07/03/20

Confidence Intervals

Out of 400 people sampled, 176 preferred Candidate A. Based on this, estimate what proportion of the voting population (π) prefers Candidate A.Use a 95% confidence level, and give your answers as... more

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Geometry

07/03/20

What are the coordinates of R′ , the image of R(−4,3) after a reflection in the line y=x ?

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Statistics Percentage

07/03/20

Formula to calculate 500 million user + 5% increase a year for X years

I know I can do 500 million + 5% for each year.But is there an easy formula to get 500 million starting value with a 5% increase a year for X years? Say I wanna know the increase in 10 years and... more

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Statistics

07/03/20

Confidence Intervals for a Proportion

Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval for a sample of size 357 with 286 successes. Enter your answer as an open-interval (i.e.,... more

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Statistics

07/03/20

Confidence Intervals for a Proportion

We wish to estimate what percent of adult residents in a certain county are parents. Out of 100 adult residents sampled, 49 had kids. Based on this, construct a 99% confidence interval for the... more

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Geometry

07/03/20

Find Central Angle in terms of pi

Arc Length= 18radius= 6In solving for Central Angle I would think of S=r(theta) and plug in those values.18=6(theta) Theta= 3Is my thinking even correct and how do i find the central Angle in... more

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Statistics

07/03/20

Construct a Confidence Interval- Need Help

Out of 400 people sampled, 180 had kids. Based on this, construct a 95% confidence interval for the true population proportion of people with kids.Give your answers as decimals, to three placesI am... more

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Algebra 1 Algebra

07/03/20

A single card is drawn at random from a standard 52 card deck. Work out the following probabilities in their simplest form: p(3)= what is the answer P(not 3)

hi this is abby pls answer i need this for school thx

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Algebra 2

07/03/20

Help with the answers plz

1) List three angles that are co-terminal with 78 degrees.2)Convert 255 degrees to radians. Find the exact value, leave your answer in terms of pi show the work.3)What is a reference angle? Make... more

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Statistics

07/03/20

null and hypothesis

A researcher in a shipping company conducted a comparative analysis by giving a qualifying examination to 40 BSMT students and 55 BSMARE students. The average and standard deviation of the scores... more

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Math Statistics

07/03/20

marbles question

A jar contains 4 red marbles numbered 1 to 4 and 8 blue marbles numbered 1 to 8. A marble is drawn at random from the jar. Find the probability the marble is odd-numbered given that the marble is... more

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Elementary Math

07/03/20

Describe a transformation that would `undo' each of the following:

(a) A translation determined by slide arrow from A to B; (b) A clockwise rotation of 75o with center O; (c) A counter clockwise rotation of 45o with center A;(d) A glide refection that is the... more

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Find the critical value z c z c for a 80% level of confidence.

Given the following confidence interval find the margin of error: I = ( 45.4 , 54.2 ) I = ( 45.4 , 54.2 )

Given the following confidence interval find the point estimate: I = ( 44 , 59.5 ) I = ( 44 , 59.5 )

suppose x varies jointly as y and z^2. Furthermore, x is 252 when y is 7 and z is 3. Find x when y is 3 and z is 5.

The numbers listed represent the amount of precipitation (in inches) last year in six different U.S. cities. Find the standard deviation. Round to two decimal places. 12.2 11.1 46.2 33.9 24.4 10.6

The numbers listed represent the amount of precipitation (in inches) last year in six different U.S. cities. Find the standard deviation. Round to two decimal places. 12.2 11.1 46.2 33.9 24.4 10.6

The numbers listed represent the amount of precipitation (in inches) last year in six different U.S. cities. Find the standard deviation. Round to two decimal places. 12.2, 11.1,46.2,33.9,24.4,10.6