02/16/21

I need help understanding the steps to take for each question please!
The executives in a company are four women and three men. Three are to be chosen at random to attend a management seminar.(a) If one of the executives is chosen at random to draw the names out of a... more
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02/16/21

Chapters 18-19 Summative Assessment
Allison wants to estimate the proportion of U.S. teens who think that a middle part is the best hairstyle. She chooses a random sample of 500 teenagers and finds that 64.8% believe a middle part is... more
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02/16/21

Chapters 18-19 Summative Assessment
1. A national newspaper reported that 10% of Americans have received the vaccine for Covid-19 (as of February 10, 2021). A local community is concerned that their citizens are not being vaccinated... more
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02/16/21

Consider two random variable X and Y
Consider two random variable X and Y with following relationY = 2X+3The probability distribution of X is given as follows:X 3 4 6p(X) 0.3 0.4 0.3Find mean and variance of distributions X, Y.
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02/16/21

Elementary probability
A box contains 3 black balls, 2 white balls... A ball is picked from the bag and then replaced, a second ball is chosen, what is the probability that 1. They are both black. 2. One is black and one... more
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02/16/21

Card Probability

what is the probability that EXACTLY, not at LEAST, but EXACTLY,1 out of 3 cards is a spade, with the three cards drawn from a 52 card deck?
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02/16/21

Statistics question!

The class levels of 29 students and a physics course are shown below. Find the mean median mode of the data if possible. If any measure cannot be found explain why. freshman: 6Junior: 2sophomore:... more
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02/16/21

I need help answering the question in my description.
A sample of n=28 individuals is randomly selected from a population with a mean of µ= 63, and a treatment is administered to the individuals in the sample. After treatment, the sample mean is found... more
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02/16/21

Approximate the area of triangle ABC. (Round your answer to one decimal place.)
Approximate the area of triangle ABC. (Round your answer to one decimal place.)a = 15.0,     b = 65.0,     c = 55.0.
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02/16/21

Approximate the area of triangle ABC. (Round your answer to the nearest whole number.)
Approximate the area of triangle ABC. (Round your answer to the nearest whole number.)𝛼 = 40°,     b = 25,     c = 45
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02/16/21

Solve ΔABC. (Round your answers to the nearest degree. If there is no solution, enter NO SOLUTION.)
Solve ΔABC. (Round your answers to the nearest degree. If there is no solution, enter NO SOLUTION.)a = 10,    b = 15,    c = 13 𝛼 =  ° 𝛽 =  ° 𝛾 =  °
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02/15/21

Find the exact value of the trigonometric expression given that sin(u) = 21/ 29 and cos(v) = − 15 /17 . (Both u and v are in Quadrant II.)
cos(v − u)= _____________
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02/15/21

Trigonometric function....
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02/15/21

Probability of seeds
If a seed is planted, it has a 75% chance of growing into a healthy plant.If 8 seeds are planted, what is the probability that exactly 3 don't grow?
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02/15/21

statistics homework
in a test of a gender-selection technique , results consisted of 208 baby girls and 204 baby boys. Based on this​ result, what is the probability of a girl born to a couple using... more
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02/15/21

What sample size should you gather to achieve a 0.75 hour margin of error?

A researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 40 bacteria reveals a sample mean of ¯x=74 hours with a standard deviation of s=4.4 hours. He would like... more
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02/15/21

For a standard normal distribution, find: P(z > c) = 0.6289 Find c.
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02/15/21

if angle CDf=(3x+14)°, angle FDE=(5x-2)°, and angle CDE =(10x-18)°, find each measure

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02/14/21

What is the 80th percentile for this exam?

Standard deviation 16Mean Score 100
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02/14/21

What percentage of the population scored between 80 and 110 points on this exam ?
Mean Score 100Standard Deviation 16
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02/14/21

What percentage of the population scored over 80 points on this exam

Standard deviation (16)Mean score (100)
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02/14/21

2. If the given two sample data sets have the same standard deviation, are these samples necessarily identical? Justify your answer
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02/14/21

I need help solving

A sample of 4 students is to be selected from a statistics class with 28 students. The class has 10 students who are parents. How many samples of 4 students are possible? How many samples are... more
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02/14/21

If x is normally distributed with mean µ and standard deviation σ, and given that the probability that x is less than 32 is 0.0228, find the value of µ.
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02/12/21

Question in description

In 2016, more than 200,000 students took the AP® Statistics exam. Of these students, 14% earned the highest score of 5. Find the probability that, in a random sample of 300 students who took the... more
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