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
UkoKoshka [18]
3 years ago
13

Which phrase best completes the diagram?

Mathematics
2 answers:
eimsori [14]3 years ago
6 0

Answer:

b informing voters

Step-by-step explanation:

Hatshy [7]3 years ago
5 0

Answer:

Informing Voters

Step-by-step explanation:

You might be interested in
I need helpppp !!! :((
Andrew [12]

Im not 100% sure but I do think it is Ratio (red to blue) of the areas

Step-by-step explanation:

3 0
3 years ago
fluorescent light factory that manufactures fluorescent lights that have a lifetime that is approximately normally distributed w
EastWind [94]

Answer:

The p-value obtained is greater than the significance level at which the test was performed, hence, we fail to reject the null hypothesis & say that there is enough evidence to conclude that the mean life of the fluorescent lights is 700 hours

Step-by-step explanation:

Complete Question

fluorescent light factory that manufactures fluorescent lights that have a lifetime that is approximately normally distributed with a mean of 700 hours and a standard deviation of 45 hours. Test the hypothesis that mean is 700 hours against the alternative hypothesis that the mean is not equal to 700 hours, if a random sample of 30 bulbs has an average life of 688 hours. Use a P-value in your answer.

Solution

For hypothesis testing, the first thing to define is the null and alternative hypothesis.

The null hypothesis plays the devil's advocate and usually takes the form of the opposite of the theory to be tested. It usually contains the signs =, ≤ and ≥ depending on the directions of the test.

While, the alternative hypothesis usually confirms the the theory being tested by the experimental setup. It usually contains the signs ≠, < and > depending on the directions of the test.

For this question, the null hypothesis is that the mean life of the fluorescent lights is 700 hours.

The alternative hypothesis will now be that the mean life of the fluorescent lights is significantly different from 700 hours.

Mathematically,

The null hypothesis is represented as

H₀: μ = 700

The alternative hypothesis is represented as

Hₐ: μ ≠ 700

To do this test, we will use the z-distribution because no information on the population standard deviation is known

So, we compute the z-test statistic

z = (x - μ₀)/σₓ

x = sample mean = 688 hours

μ₀ = 700 hours

σₓ = standard error = (σ/√n)

σ = standard deviation = 45 hours

n = Sample size = 30

σₓ = (45/√30) = 8.2158383626 = 8.216

z = (688 - 700) ÷ 8.216

z = 1.46

checking the tables for the p-value of this z-statistic

Significance level = 0.05 (This is used when significance level isn't given)

The hypothesis test uses a two-tailed condition because we're testing in two directions.

p-value (for z = 1.46, at 0.05 significance level, with a two tailed condition) = 0.14429

The interpretation of p-values is that

When the (p-value > significance level), we fail to reject the null hypothesis and when the (p-value < significance level), we reject the null hypothesis and accept the alternative hypothesis.

So, for this question, significance level = 0.05

p-value = 0.14429

0.14429 > 0.05

Hence,

p-value > significance level

This means that we fail to reject the null hypothesis & say that there is enough evidence to conclude that the mean life of the fluorescent lights is 700 hours.

Hope this Helps!!

6 0
3 years ago
Which property is not a characteristic of a parallelogram?
ratelena [41]

Answer:

B

Step-by-step explanation:

8 0
3 years ago
What is the result of adding 2x+7y=4 and -2x-8y=-2
Anika [276]

Answer:

x = 2 + 3.5y

Step-by-step explanation:

6 0
2 years ago
I need help please!!!​
Harlamova29_29 [7]
Answer: you’re multiplying by 2 each time
7 0
2 years ago
Other questions:
  • Lillian works 7hours each day for 5 days a week she earn £420 each week how much does she earn per hour
    6·1 answer
  • 72 pt= how many gallons?
    11·2 answers
  • "A quadrilateral is a trapezoid if and only if it has exactly one pair of parallel sides."
    15·2 answers
  • PLS HURRY DO EVERY QUESTION PLS
    10·2 answers
  • Find the measure of the following angles.<br><br> m &lt; LPM: <br><br> m <br> m <br> HELP ASAP‼️
    10·2 answers
  • The sum of 3 times a and b
    6·1 answer
  • If f(x)=x³-2x², which expression equivalent to f(i)?
    11·1 answer
  • Solve for y<br> 2(3 + 3y) + y = 11
    9·1 answer
  • Help!! Will give brainliest and bonus air-hugs!!
    9·1 answer
  • Use properties to rewrite the given equation. Which equations have the same solution as 2.3p – 10.1 = 6.5p – 4 – 0.01p? Select t
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!