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dybincka [34]
3 years ago
6

School bullying is a form of aggressive behavior that occurs when a student is exposed repeatedly to negative actions from anoth

er student. In order to study the effectiveness of an antibullying policy at elementary​ schools, a survey of over​ 2,000 elementary school children was conducted. Each student was asked if he or she ever bullied another student. In a sample of 1358 ​boys, 750 claimed they had never bullied another student. In a sample of 1379 ​girls, 964 claimed they had never bullied another student.
a. Estimate the true proportion of Dutch boys who have never bullied another student.
b. Estimate the true proportion of Dutch girls who have never bullied another student.
c. Estimate the difference in the proportions with a 90% confidence interval.
d. Make a statement about how likely the interval you used in part c contains the true difference in proportions.
e. Which group is more likely to bully another student, Dutch boys or Dutch girls?
Mathematics
1 answer:
Julli [10]3 years ago
8 0

i think its E sorry if im wrong

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Indiras spring garden has half as many tulips as daffodils and three times as many hyacinths as tulips. If there are a total of
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Indira is having 34 tulips, 68 daffodils and 102 hyacinths , altogether 204 flowers in her spring garden.

Given, In Indira's springtime garden, there are three times more hyacinths than tulips and half as many daffodils as tulips.

let the number of tulips be = x

    the number of daffodils be = y

    the number of hyacinths be = z

hence according to the question,

tulips are (x) = 1/2 (y) = y/2

hyacinths are (z) = 3(x) = 3x

therefore, total flowers = 204

tulips ₊ daffodils ₊ hyacinths = 204

y/2 ₊ y ₊ 3x = 204

substitute x value in the above equation.

y/2 ₊ y ₊ 3(y/2) = 204

take LCM

y ₊ 2y ₊ 3y = 408

6y = 408

y = 408/6

y = 68

hence the number of daffodils is 68.

now substitute y value in x = y/2

x = 68/2

x = 34

now substitute x value in z= 3x

z = 3(34)

z = 102

hence we get the number of tulips,daffodils and hyacinths as 34 , 68 and 102 respectively.

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1 year ago
HELP PLEASE THIS IS OVER DUE :(
Galina-37 [17]

Answer:

2.02 i think

Step-by-step explanation:

8 0
3 years ago
Find x if x-8=2(x+4)
Fofino [41]

Answer:

x=-16

Step-by-step explanation:

x-8=2(x+4)\\x-8=2x+8\\-x=16\\x=-16

4 0
3 years ago
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Ariana's family took a road trip to the Grand Canyon. Ariana fell asleep 65% of the way through the trip. If Ariana fell asleep
Anvisha [2.4K]

Answer:

1000 miles

Step-by-step explanation:

650 ÷ 65 = 10

10 × 100 = 1000

5 0
3 years ago
Eighteenpassengers get on an airport shuttle at the airport. The shuttle has a route that includessixhotels, and passengersgetof
xz_007 [3.2K]

Answer:

So, exist 18564 different possibilities.

Step-by-step explanation:

We know that the eighteen passengers get on an airport shuttle at the airport.  The shuttle has a route that includes six hotels, and passengers get off the shuttle at their hotel.

We calcuate how many different possibilities exist that eighteen passengers can choose six hotels. We get:

C_6^{18}=\frac{18!}{6!(18-6)!}=18564

So, exist 18564 different possibilities.

5 0
3 years ago
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