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
Dennis_Churaev [7]
3 years ago
7

Any Help Please?!

Mathematics
1 answer:
umka2103 [35]3 years ago
4 0
Total number of students in the sample = 100

Atleast 3 means equal to or greater than 3. So in order to find the number of students in the sample who play outdoor games for atleast 3 hours we need to add the number of students who play for 3 hours or more.

Therefore, number of students who play for atleast 3 hours = 62 + 8 + 0 = 70

In the sample of 100 students, 70 students play the outdoor games for atleast 3 hours.

Base on this we can the sample proportion of students who play outdoor games for atleast 3 hours = 70/100 = 0.7

Based on the sample proportion, out of 1200 students the expected number of students who will play outdoor games for atleast 3 hours = 0.7 x 1200 = 840 students

Thus, 840 students out of 1200 would be expected to play outdoor games for at least three hours every week. Option B is the correct answer
You might be interested in
The measures of the angles of △ABC are given by the expressions in the table.
vovangra [49]
The sum of angles of a triangle is 180°.

48 +(6x -28) +2x = 180
8x +20 = 180
8x = 160
x = 20

∠B = (6x -28)° = (6*20 -28)° = 92°

∠C = 2x° = 40°

___
x = 20
∠B = 92°
∠C = 40°
5 0
3 years ago
In a test of the effectiveness of garlic for lowering​ cholesterol, 8181 subjects were treated with raw garlic. Cholesterol leve
xz_007 [3.2K]

Answer:

With garlic​ treatment, the mean change in LDL cholesterol is not greater than 0.

Step-by-step explanation:

The dependent <em>t</em>-test (also known as the paired <em>t</em>-test or paired samples <em>t</em>-test) compares the two means associated groups to conclude if there is a statistically significant difference amid these two means.

In this case a paired <em>t</em>-test is used to determine the effectiveness of garlic for lowering​ cholesterol.

A random sample of 81 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment.

The hypothesis for the test can be defined as follows:

<em>H₀</em>: With garlic​ treatment, the mean change in LDL cholesterol is not greater than 0, i.e. <em>d</em> ≤ 0.

<em>Hₐ</em>: With garlic​ treatment, the mean change in LDL cholesterol is greater than 0, i.e. <em>d</em> > 0.

The information provided is:

\bar d=0.40\\SD_{d}=16.2\\\alpha =0.01

Compute the test statistic value as follows:

t=\frac{\bar d}{SD_{d}/\sqrt{n}}\\\\=\frac{0.40}{16.2/\sqrt{81}}\\\\=0.22

The test statistic value is 0.22.

Decision rule:

If the <em>p</em>-value of the test is less than the significance level then the null hypothesis will be rejected and vice-versa.

Compute the <em>p</em>-value of the test as follows:

p-value=P(t_{n-1}>0.22)\\=P(t_{80}>0.22)\\=0.4132

*Use a <em>t</em>-table.

The <em>p</em>-value of the test is 0.4132.

<em>p-</em>value= 0.4132 > <em>α</em> = 0.01

The null hypothesis was failed to be rejected.

Thus, it can be concluded that with garlic​ treatment, the mean change in LDL cholesterol is not greater than 0.

3 0
2 years ago
Simplify the product using FOIL. (4x + 3)(2x + 5)
Dafna1 [17]
8x^2+20x+6x+15. Combine like terms. 8x^2+26x+15. When using foil just multiply the contents of one pair of brackets on another pair.
3 0
3 years ago
Read 2 more answers
Listed below are several statements that relate to financial accounting and reporting. Identify the accounting concept that appl
9966 [12]

Answer:

The accounting concept that applies to the given statements is as follow:

1. SiriusXM Radio Inc. files its annual and quarterly financial statements with the SEC.  ⇒ The Periodicity Assumption.

2. The president of Applebee’s International, Inc., travels on the corporate jet for business purposes only and does not use the jet for personal use.   ⇒ The Economic Entity Assumption.

3. Jackson Manufacturing does not recognize revenue for unshipped merchandise even though the merchandise has been manufactured according to customer specifications.  ⇒ Revenue Recognition

4. Lady Jane Cosmetics depreciates the cost of equipment over their useful lives.  ⇒  Expense Recognition

6 0
3 years ago
Which shows a reflection over the x-axis?
a_sh-v [17]

Answer:

Probably a bit late but its A the first one ;P

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Other questions:
  • Help me with the question in the picture?
    13·1 answer
  • A commuter has $245 in his computer savings account. This account changes by -$15 each week he buys a ticket. In one time period
    11·1 answer
  • PLEASE HELP I GIVE THANKS
    14·1 answer
  • What is the work for this 2/3h-1/3h=-3
    6·1 answer
  • A polar bear swims 390 meters at a constant rate in 150 seconds. What is the speed of the polar bear?
    13·1 answer
  • The graph of which of the following will be parallel to the graph of 4x – 3y = –12? A.y= 4/3x -3/2 B.6x-4y=-8 C. y=3/4x+1 D.4x-
    6·2 answers
  • What is 4/3 subtracted by 2/5
    15·1 answer
  • What is the volume of a sphere with a radius of 8.2 ft, rounded to the nearest tenth of a cubic foot?
    5·1 answer
  • What 1/2 as a decimal??? plaese helppp
    9·1 answer
  • Find the inverse of the function.<br> y=x–6
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!