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
Sati [7]
3 years ago
9

HELP ME PLZZZZZZZZZZZ ASAP IT WOULD MEAN A LOT

Mathematics
1 answer:
NikAS [45]3 years ago
5 0

Answer:

1 sec

Step-by-step explanation:

You might be interested in
Suppose that a standardized biology exam has a mean score of 80% correct, with a standard deviation of 3. The school administrat
NemiM [27]

Answer:

The 99% confidence interval is between 62.36%(lower bound) and 89.64%(upper bound).

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 sample of 65 students from the freshmen class is used and a mean score of 76% correct is obtained.

This means that n = 65, \pi = 0.76

99% confidence level

So \alpha = 0.005, z is the value of Z that has a pvalue of 1 - \frac{0.005}{2} = 0.995, so Z = 2.575.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.76 - 2.575\sqrt{\frac{0.76*0.24}{65}} = 0.6236

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.76 + 2.575\sqrt{\frac{0.76*0.24}{65}} = 0.8964

0.6236*100 = 62.36%

0.8964*100 = 89.64%

The 99% confidence interval is between 62.36%(lower bound) and 89.64%(upper bound).

6 0
2 years ago
If rectangle ABCD was reflected over the y-axis, reflected over the x-
olga_2 [115]

Answer:

-4, 1

Step-by-step explanation:

5 0
3 years ago
The number 6,253 rounded to the nearest hundred is —————
faust18 [17]

Answer:

6300

Step-by-step explanation:

253 is closer to 300 than to 200

6 0
3 years ago
Read 2 more answers
Find the area of the figure by subtraction.
arsen [322]

Answer:

<em>56</em>

Step-by-step explanation:

3 0
2 years ago
PLS HELP WITH QUESTION 5. I’m being timed
mixas84 [53]
X = 5

AE and congruent to EC
6 0
2 years ago
Other questions:
  • HELP DUE TONIGHT
    11·1 answer
  • Which of the following represents the zeros of f(x) = x3 − 3x2 − 2x + 6?
    6·2 answers
  • What is the better buy? 1.50 for 5 oz 1.20 for 3 oz
    8·1 answer
  • 100 points + brainliest! Simple math
    7·2 answers
  • −4.5=−0.5(x−7.1) need sum help
    7·1 answer
  • Thời gian vận chuyển hàng hóa trên tuyến đường AB là biến ngẫu nhiên X có phân phối
    6·2 answers
  • Vvbbbbbbbbbbbbbbbbbbbbbbb
    13·1 answer
  • . 6x – 3y = 15
    15·1 answer
  • Help me out please.i will give brainly
    13·2 answers
  • A frying pan has a circumference of 43.96 centimeters What is the radius of the frying pan? Use 3.14 for
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!