1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andrews [41]
3 years ago
8

A recent survey showed that among 100 randomly selected college seniors, 20 plan to attend graduate school and 80 do not. Determ

ine a 68 % confidence interval for the population proportion of college seniors who plan to attend graduate school. (Enter each answer rounded to three decimal places.)
Mathematics
1 answer:
Hunter-Best [27]3 years ago
4 0

Answer:

The 68% confidence interval for the population proportion of college seniors who plan to attend graduate school is (0.16, 0.24).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

A recent survey showed that among 100 randomly selected college seniors, 20 plan to attend graduate school and 80 do not.

This means that n = 100, \pi = \frac{20}{100} = 0.2

68% confidence level

So \alpha = 0.32, z is the value of Z that has a pvalue of 1 - \frac{0.32}{2} = 0.84, so Z = 0.995.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2 - 0.995\sqrt{\frac{0.2*0.8}{100}} = 0.16

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2 + 0.995\sqrt{\frac{0.2*0.8}{100}} = 0.24

The 68% confidence interval for the population proportion of college seniors who plan to attend graduate school is (0.16, 0.24).

You might be interested in
Left Witch needs 3.25 gallons of "Toe of Frog" in her potion. If she can get half a gallon for $2.50, how much will she spend
Sladkaya [172]

Answer:

$16.25

Step-by-step explanation:

Half a gallon for $2.50 is the same as a quarter a gallon for $1.25.

If she needs 3.25 gallons, which is 13 quarters, we do $1.25 * 13 = $16.25.

Therefore, she will spend $16.25.

6 0
2 years ago
Someone help me with this question plzzz
asambeis [7]

Answer:

Step-by-step explanation:

As per Janayda,

From the figure attached,

In ΔTRQ,

m∠TRQ + m∠RQT + m∠QTR = 180°

25° + m∠RQT + 35° = 180°

m∠RQT = 180° - 60°

m∠RQT = 120°

Since, m∠RQT + m∠PQT = 180° [Linear pair of angles]

m∠PQT = 180° - m∠RQT

             = 180° - 120°

             = 60°

In right angled triangle TPQ,

m∠TPQ + m∠PQT + m∠PTQ = 180°

90° + 60° + m∠PTQ = 180°

m∠PTQ = 180° - 150°

             = 30°

Similarly, other angles can also be evaluated from the given information.

In ΔQTP and ΔNTP,

TP ≅ TP [Reflexive property]

NP ≅ PQ [Given]

ΔQTP ≅ ΔNTP [By LL postulate for congruence]

Therefore, Janayda is correct.

While Sirr is incorrect.

Since, there is not the enough information to prove ΔRTQ and ΔMTN equal, Isabelle is incorrect.

7 0
3 years ago
Are these correct? Please help with #12
BartSMP [9]
All of them seem pretty correct.
Also the answer to 12 is this...

Remove unnecessary parentheses
-6x2/3p^8x3

Then reduce the #’s with the greatest common divisor 3

-6x2p^8

Calculate the product

-12p^8

And that’s your answer:)))





8 0
3 years ago
How do you find the mean median mode and outlier
goblinko [34]

Answer:

The mean is the average of all numbers. To find the mean you add all numbers and divide by how many numbers you have (i.e. 1+2+3 =6. 6/3 =2. Mean is 2.) Median is the middle of the numbers. To find the median arrange the numbers from least to greatest, and the number in the middle is the median. For example, 1, 2, 3, 4, 5.  In this 3 is the median because it is in the middle.  The outlier is the number that is different from others. For example, 1, 2, 3, 4, 17.  In this case 17 is the outlier because it is different and farther than the other numbers.  

Step-by-step explanation:


6 0
3 years ago
If P= (-6,4) find Ry= -x (P)
julsineya [31]

The value of Ry= -x (P) is P' = (4, 6)

<h3>How to determine the transformation?</h3>

The point is given as:

P = (-6, 4)

The transformation Ry= -x (P) means tha:

(x, y) = (y, -x)

So, we have:

P' = (4, 6)

Hence, the value of Ry= -x (P) is P' = (4, 6)

Read more about transformation at:

brainly.com/question/11709244

#SPJ1

3 0
2 years ago
Other questions:
  • What is (7×10)+(4×1)+(9×1\100)+(2×1\000
    6·2 answers
  • Simplify (x^1/2)^1/6<br><br> a. x^1/3<br> b. x^1/4<br> c. x^1/12<br> d. x^2/3
    11·1 answer
  • What is the answer ​
    8·1 answer
  • What is the side length of the cube
    11·2 answers
  • You roll a 6-sided die with faces numbered 1 through 6, and toss a coin. What is the probability of rolling a 2 or getting heads
    10·1 answer
  • What is the value of f(−1) when f(x)=2x+2
    12·1 answer
  • Hhhhhhhhhhhhheeeeeeellllllllppppppppp
    9·1 answer
  • I need help solving this​
    5·2 answers
  • Someone answer this please
    12·1 answer
  • For each ordered pair, determine whether it is a solution to the system of equations.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!