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stepan [7]
3 years ago
5

A psychology professor at a university is interested in determining the proportion of undergraduate students at her university w

ho self-identify as early-risers, night-owls, or neither. She decides to perform an observational study to investigate this question, so she randomly selects 500 undergraduate students from a university with 14364 undergraduate students enrolled to whom she poses her question. 274 respond that they would call themselves night-owls, 124 replied that they are early-risers, and 102 respond that they are neither.
Is it appropriate to conduct a hypothesis test for proportions, testing whether the proportion of college students who identify as night-owls is larger than 0.33?
Select one:

a. No, because the professor conducted an observational study.
b. Yes, it is appropriate.
c. No, because the professor’s question had 3 possible answers.
d. No, because the assumptions necessary for inference are not met.
Mathematics
1 answer:
mario62 [17]3 years ago
6 0

Answer:

No, because the professor’s question had 3 possible answers

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Cheese pizza cost 6$ each and four topping pizza that cost $10 each. If you order c cheese pizzas and f four toppings how much w
son4ous [18]

Answer:

Total = \$6c + \$10f

Step-by-step explanation:

Given

Cheese\ Pizza = \$6

Topping\ Pizza = \$10

Required

Cost of c cheese and f topping pizza

Solving for c cheese pizza

If 1 cheese pizza costs $6,

c cheese pizza would cost $6 * c

Solving for f topping pizza

If 1 topping pizza costs $10,

f topping pizza would cost $10 * f

Hence:

Total = \$6 * c + \$10 * f

Total = \$6c + \$10f

<em>Hence, the total amount paid is: </em>\$6c + \$10f<em></em>

6 0
3 years ago
Hellllllllllllllllp plz
choli [55]

Answer:

The triangles are congruent.

Step-by-step explanation:

The dashes represent the same size of a side.

If one of the triangles were flipped, the dashes will be in the same place on each triangle causing them to be congruent.

3 0
2 years ago
The attendance at a baseball game was 400 people. Student tickets cost $2 and adult tickets cost $3. Total ticket sales were $10
mixer [17]
Let x be the number of adult tickets sold.
<span>That means 400 - x is the number of student tickets.
The revenue from adult tickets will be $3 * x, which we can call 3x.
The revenue from student ticks will be $2 * (400 - x), or 800 - 2x.
The total revenue is $1050, so that means:
3x + (800 - 2x) = 1050.
Removing the parentheses:
3x + 800 - 2x = 1050
</span><span>Subtracting 800 from both sides:
3x - 2x = 250
Simplifying the left side:
x = 250, which is the number of adult tickets.
400-x = student tickets = 400-250 = 150.
ALWAYS check!
In this case, check the revenue:
3x = 3(250) = 750
2(150) = 300
750 + 300 = 1050. Check!</span>
7 0
2 years ago
Please help me answer this question.
GaryK [48]

Answer:

The answers are in the attachment

7 0
2 years ago
Find the exact value of cos(arcsin(1/4)). For full credit, explain your reasoning.
Westkost [7]
First way
arcsin(1/4) means that 1/4 sin of the angle.

sin(α)=1/4
sin²α+cos²α=1
(1/4)²+cos²α=1
cos²α=1-1/16 =15/16
cosα=+/-(√15)/4

<span>Second way
</span>
sin(α)=1/4 =opposite leg/hipotenuse
cos(α)=adjacent leg/hypothenuse
adjacent leg =√(hypotenuse²- Opposite²)=√(16-1)=√15
cosα=+/-√15/4

For one value of sinα, possible 2 values of cosα.

5 0
2 years ago
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