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Rudiy27
2 years ago
5

A curious statistics student cannot get enough statistics, so he decides to analyze the percentage of students sleeping in his s

tatistics class. He discovers that of the 30 students in his class, 47% of the students were asleep at some point during the class period. Assuming the 30 students is less than 10% of all the students taking statistics in his school, and assuming the 30 students in the class were randomly assigned to the class, what model would he use to analyze the percentage of sleeping statistics students
Mathematics
1 answer:
Readme [11.4K]2 years ago
3 0

Answer:

c) N(.47, .09)

Step-by-step explanation:

Options to the question are <em>"a) N(.30, .10), b) N(.30, .09). c) N(.47, .09), d) N(.47, .008), e) N(.30, .008)"</em>

<em />

Pο = 47% = 0.47

n = 30

Mean = Pο = 0.47

S.D = Pο(1-Pο) / n

S.D = 0.47 * 0.53 / 30

S.D = 0.09

Thus, the percentage of sleeping statistics of students follows a Normal distribution with mean = 0.47 and S..D = 0.09

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Brian can get an 8-pack of bottled sports drink for $5.28 . How much would Brian have to pay for a 6-pack of the bottled sports
Ipatiy [6.2K]
Brian will have to pay $3.96
7 0
3 years ago
Grandma has 1/2 of her birthday cake left . she wants her 12 grandchildren to each get the same size piece of cake to take home
eimsori [14]

Answer: 1/24


Step-by-step explanation:

you need to use kcf ( keep the first fraction change division into multiplication and flip the other fraction)

turn 12 into 12/1 and then just divide.

1/2 x 1/12

= 1/24



6 0
3 years ago
Read 2 more answers
The height in feet is modelled by the function below, where the t is in
Sedaia [141]

The object reaches the lowest height at 5 seconds

<h3>How to determine the time?</h3>

The function is given as:

f(t) = -2t² +22t + 6

Differentiate the function

f'(t) = -4t +22

Set to 0

-4t +22 = 0

Subtract 22 from both sides

-4t = -22

Divide both sides by -4

t = 5.5


Remove decimal points

t = 5

Hence, the object reaches the lowest height at 5 seconds

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6 0
2 years ago
Consider the following sets: R = {x | x is the set of rectangles} P = {x | x is the set of parallelograms} T = {x | x is the set
Liula [17]
"T is a subset of P"

Not true since triangle has three sides but parallelogram has four sides.

"E is a subset of I"

True since equilateral triangles are isosceles triangles with all angles equal.

"S is a subset of T"

True since scalene triangles are still triangle.

"I ⊂ E"

False since there are isosceles triangles those are not equilateral triangles. Namely triangle with angles 20°, 20°, 140°

"T ⊂ E"

False since not all triangles are equilateral. Scalene triangle is one of counterexamples.

"R ⊂ P"

True since rectangles are parallelograms with right angles.

Final answer: <span>E is a subset of I, </span>S is a subset of T, and R ⊂ P.

Hope this helps.
6 0
3 years ago
Read 2 more answers
A 4-foot tree was planted in 1984. The tree grows continuously by 22% each year from this point forward. Find the height of the
nata0808 [166]

Answer:

the tree will be 11.04 feet tall

Step-by-step explanation:

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every year it grows 0.88 foot.

0.88 x 8 = 7.04

4 + 7.04 = 11.04 feet tall

sorry if this is wrong!

3 0
2 years ago
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