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
777dan777 [17]
2 years ago
12

I need help with the Question D:

Mathematics
2 answers:
lozanna [386]2 years ago
3 0
Its 15/4
^_^ hope this helps
kolbaska11 [484]2 years ago
3 0
It's 15/4 because if you add 1 1/4 cup + 1 1/4 + 1 1/4 you would get 3 3/4 and in a improper fraction it's 15/4 (:
You might be interested in
The composite scores of individual students on the ACT college entrance examination in 2009 followed a normal distribution with
Mumz [18]

Answer:

35.57% probability that a single student randomly chosen from all those taking the test scores 23 or higher.

0.41% probability that a simple random sample of 50 students chosen from all those taking the test has an average score of 23 or higher.

The lower the standard deviation, the higher the z-score, which means that the higher the pvalue of X = 23, which means there is a lower probability of scoring above 23. By the Central Limit Theorem, as the sample size increases, the standard deviation decreases, which means that Z increases.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this problem, we have that:

\mu = 21.1, \sigma = 5.1

What is the probability that a single student randomly chosen from all those taking the test scores 23 or higher?

This is the pvalue of Z when X = 23.

Z = \frac{X - \mu}{\sigma}

Z = \frac{23 - 21.1}{5.1}

Z = 0.37

Z = 0.37 has a pvalue of 0.6443

1 - 0.6443 = 0.3557

35.57% probability that a single student randomly chosen from all those taking the test scores 23 or higher.

What is the probability that a simple random sample of 50 students chosen from all those taking the test has an average score of 23 or higher?

Now we use the central limit theorem, so n = 50, s = \frac{5.1}{\sqrt{50}} = 0.72

Z = \frac{X - \mu}{s}

Z = \frac{23 - 21.1}{0.72}

Z = 2.64

Z = 2.64 has a pvalue of 0.9959

1 - 0.9959 = 0.0041

0.41% probability that a simple random sample of 50 students chosen from all those taking the test has an average score of 23 or higher.

Why is it more likely that a single student would score this high instead of the sample of students?

The lower the standard deviation, the higher the z-score, which means that the higher the pvalue of X = 23, which means there is a lower probability of scoring above 23. By the Central Limit Theorem, as the sample size increases, the standard deviation decreases, which means that Z increases.

5 0
3 years ago
Earning for 3weeks from a part time job shown in the table . He is offered a job that will pay 7.25 per hour . Which job pays be
xz_007 [3.2K]

7.25 hour is better because multiply by eleven and its 79.75 which is higher than the on on the table

3 0
3 years ago
Y = 3(x+ 4)^2+ 4 plz find the vertex and whether the graph has a minimum or maximum point
Paladinen [302]

Answer:

look at the screenshot hun!!

Step-by-step explanation:

6 0
2 years ago
What is the surface area of the prism
V125BC [204]

Answer:

14 squared

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
What is the answer to 5t-26=18t
AlladinOne [14]

Answer:

t = -2

Step-by-step explanation:

5t - 26 = 18t

Add 26 to both sides:

5t - 26 + 26 = 18t + 26

Simplify:

5t = 18t + 26

Subtract 18t from both sides:

5t - 18t = 18t + 26 - 18t

Simplify:

-13t = 26

Divide both sides by -13:

-13t/-13 = 26/-13

Therefore:

t = -2

I hope this helps!

6 0
2 years ago
Read 2 more answers
Other questions:
  • The value of 8 in 800 is how many times as large as the value of 8 in 80
    14·2 answers
  • Peaches are being sold for $2 per pound. If x represents the number of pounds of peaches bought and y represents the total cost
    7·2 answers
  • Sam has $40. He buys a book for $12.99 and a puzzle for $15.49.
    12·2 answers
  • Which relationship between x and y in the equation shows a proportional relationship y=12x y=12/x y=2x+6 y=x/2+3
    5·1 answer
  • The production possibilities curve may shift outward as a result of a(n)
    15·1 answer
  • Given f(x) = the quantity of x minus 5, divided by 3, solve for f−1(3).
    15·1 answer
  • I really need help with this. Thank you!!
    15·1 answer
  • Question in picture below:
    7·1 answer
  • 3. Which of the following is considered to be the broadest taxonomic division?
    9·2 answers
  • Rationalize the denominator of $\displaystyle \frac{1}{\sqrt{2} + \sqrt{3} + \sqrt{7}}$, and write your answer in the form\[
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!