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
tiny-mole [99]
3 years ago
5

How do I do A, B, and C on #2? How do I do #3? PLEASE, I REALLY NEED HELP. PLEASE.

Mathematics
2 answers:
RUDIKE [14]3 years ago
7 0
Yeah I cant see it!! Sorry
kodGreya [7K]3 years ago
6 0

Answer:

Dude the picture is really blurry

Step-by-step explanation:

You might be interested in
48oz sprite for $1.39 or 32 oz dr. pepper for $0.89?
leonid [27]
Answer: Dr. Pepper


Divide 1.39 by 48. Then divide 0.89 by 32.
7 0
3 years ago
HELP ASAP ! TEST! The scatterplot shows the energy in watts and the light output in lumens per watt of several lightbulbs. Which
Nina [5.8K]

Answer:

D) There is no apparent association between the energy and light output.   the image looks the most similar to a scatterplot with no relationship. im not finished with the test yet but im just trying to help anyone who might need it! i'll update with my test results.

3 0
3 years ago
A recent survey describes the total sleep time per night among college students as approximately Normally distributed with mean
marin [14]

Answer:

a) \sigma_{\bar X}= \frac{1.26}{\sqrt{165}}= 0.0981

b) We expect 68% of the values between : (6.6219, 6.8181)

We expect 95% of the values between : (6.5238, 6.9162)

We expect 99.7% of the values between : (6.4257, 7.0143)

c) z = \frac{6.9-6.72}{0.0981}= 1.835

And we can use the z normal table or excel and we got:

P(Z

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Let X the random variable that represent the total sleep time of a population, and for this case we know the distribution for X is given by:

X \sim N(6.72,1.26)  

Where \mu=6.72 and \sigma=1.26

(a)  What is the standard deviation for the average time in hours? (Round your answer to four decimal places.)

For this case the sample mean have the following distirbution

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And the deviation is given by:

\sigma_{\bar X}= \frac{1.26}{\sqrt{165}}= 0.0981

in minutes?= (Round your answer to three decimal places.)  

(b)  Use the 95 part of the 68–95–99.7 rule to describe the variability of this sample mean. (Round your answer to four decimal places.)

The empirical rule, also known as three-sigma rule or 68-95-99.7 rule, "is a statistical rule which states that for a normal distribution, almost all data falls within three standard deviations (denoted by σ) of the mean (denoted by µ)".

• The probability of obtain values within one deviation from the mean is 0.68

• The probability of obtain values within two deviation's from the mean is 0.95

• The probability of obtain values within three deviation's from the mean is 0.997

We expect 68% of the values between : (6.6219, 6.8181)

We expect 95% of the values between : (6.5238, 6.9162)

We expect 99.7% of the values between : (6.4257, 7.0143)

(c) What is the probability that your average will be below 6.9 hours? (Round your answer to four decimal places.)

For this case we can use the z score formula given by:

z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

And we can find the z score for 6.9 and we got:

z = \frac{6.9-6.72}{0.0981}= 1.835

And we can use the z normal table or excel and we got:

P(Z

4 0
2 years ago
Elisa withdrew $20 at a time from her bank account and withdrew a total of $160. Frances withdrew $49 at a time from his bank ac
Alina [70]

Answer: Elisa

Step-by-step explanation:

Elisa withdrew $20 at a time from her bank account and withdrew a total of $160. The number of times she made a withdrawal will be:

= $160 / $20

= 8 times

Frances withdrew $49 at a time from his bank account and withdrew a total of $196. The number of times she made a withdrawal will be:

= $196 / $49

= 4 times.

From the calculations above, we can see that Elisa made the greater number of withdrawals.

5 0
3 years ago
Help me please!!!!!!!!!!!!!
marusya05 [52]

Answer:

B.) (0,1)

Hope this helps : )

7 0
2 years ago
Read 2 more answers
Other questions:
  • A children's birthday party at an indoor play center costs $50 to rent the space and $6.25 per child. Gina wants to spend no mor
    5·1 answer
  • Please help me [Trig]
    13·1 answer
  • Which one of the following fractions is equivalent to 1/2 a. 1/4 b. 2/4 c. 1/8 d. 2/8
    12·2 answers
  • a total of 300 trees will be planted in a park. there will be 2 pine trees for every 3 maple trees planted plot the poinys that
    15·2 answers
  • Select the coordinates of two points on the line y = 8
    6·1 answer
  • 15x - 12y =13<br> 30x +9y =4<br> whats the value of x
    8·2 answers
  • A group of friends wants to go to the amusement park. They have no more than $125 to spend on parking and admission. Parking is
    6·1 answer
  • Simplify 4x × 5y<br> i really need halp quick!
    13·2 answers
  • If you sell the T-shirts at $24 and the expenses for the shirt is 10x + 100, how many T-shirts should you sell to make a profit?
    9·2 answers
  • Which of the following demonstrates a fair choice of 1 from among 12 candidates?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!