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Using the textbook data set nlschools.csv, perform a hypothesis test to determine whether the proportion of students with language test scores greater than 37 is different for students from families of social-economic status at most 25 and students from families of social-economic status greater than 25. Perform the test at the α = 0.05 significance level.

Answers

Answer 1

Answer:

Answer:

p-value is greater than 0.05, hence we accept the null hypothesis.

Step-by-step explanation:

See attached images

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AC is a straight segment as shown in the diagram below. If the distance between points A and C is 67 miles, determine the distance between points A and B.

153.8=3.14(r)squared

Answers

153.8 = 3.14r^2

Divide each side by 3.14 to get r alone.

48.9 = r^2

Take the square root of each side to isolate r.

r = 6.999

r= 7

r=12.27

153.8-3.14=150.66

150.66 square root is 12.27

According to a recent report, 60% of U.S. college graduates cannot find a full time job in their chosen profession. Assume 57% of the college graduates who cannot find a job are female and that 18% of the college graduates who can find a job are female. Given a male college graduate, find the probability he can find a full time job in his chosen profession? (See exercise 58 on page 220 of your textbook for a similar problem.)

Answers

Answer:

There is a 55.97% that a male can find a full time job in his chosen profession.

Step-by-step explanation:

We have these following probabilities:

A 60% probability that a college graduates cannot find a full time job in their chosen profession.

A 40% probability that a college graduates can find a full time job in their chosen profession.

57% of the college graduates who cannot find a job are female

43% of the college graduates who cannot find a job are male

18% of the college graduates who can find a job are female

82% of the college who can find a job are male.

Given a male college graduate, find the probability he can find a full time job in his chosen profession?

The total males are 43% of 60%(Those who cannot find a job) and 82% of 40%(Those who can find a job). So the percentage of males is $P(M) = 0.43*0.60 + 0.82*0.40 = 0.586$

Those who are males and find a job in their chosen profession are 82% of 40%. So $P(M \cap J) = 0.82*0.40 = 0.328$

$P = (P(M \cap J))/(P(M)) = (0.328)/(0.586) = 0.5597$

There is a 55.97% that a male can find a full time job in his chosen profession.

A ball is thrown downward from the top of a building with an initial speed of 25 m/s. It strikes the ground after 2.0 s. How high is the building, assuming negligible air resistance

Answers

Use one of the equations of motion under constant acceleration:-

s = ut + 0.5at^2 where s = distance, u - initial velocity, a = acceleration ( in this case it is gravity = 9.81 m s^-2) and t = time.

here we have s = 25*2 + 0.5*9.81 * 2^2

= 69.62 meters answer

Answer: The height of the building is 69.6 m

Explanation:

To calculate the height of the building, we use second equation of motion:

$s=ut+(1)/(2)at^2$

where,

s = height of the building = ?

u = initial velocity of the ball = 25 m/s

a = acceleration due to gravity = $9.8m/s^2$

t = time taken = 2.0 sec

Putting values in above equation, we get:

$s=(25* 2.0)+(1)/(2)* 9.8* (2.0)^2\n\ns=69.6m$

Hence, the height of the building is 69.6 m

The diagram below shows a mass suspended on a string called a pendulum.What energy transformation occurs as the mass moves from point A to B?

A-kinetic energy is converted to potential energy

B-potential energy is converted to kinetic energy

C-chemical energy is converted to electrical energy

D-gravitational energy is converted to chemical energy

Answers

Answer:

D-gravitational energy is converted to chemical energy

Step-by-step explanation:

Please give me brainliest

A television is 36 inches by 18 inches. What is the area?

Answers

The area would be length times width so the answer is 648 squared inches!

we know that area of a rectangle is length(×)its breadth and the television is a rectangular screen so the area of television screen is 36 X 18 that is 648square inches.
hope this is helpful

-5X +1 92 - 321+13 - 12X
Plz I need help

Answers

Answer:

x= 116/17

Step-by-step explanation:

5x+192−321+13=−12x

Step 1: Simplify both sides of the equation.

5x+192−321+13=−12x

5x+192+−321+13=−12x

(5x)+(192+−321+13)=−12x(Combine Like Terms)

5x+−116=−12x

5x−116=−12x

Step 2: Add 12x to both sides.

5x−116+12x=−12x+12x

17x−116=0

Step 3: Add 116 to both sides.

17x−116+116=0+116

17x=116

Step 4: Divide both sides by 17.

17x/17=116/17

x = 116/17

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