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3 years ago

10

An airline food service finds that a recent flight of 120 passengers ordered dinner as depicted in the table to the right. Based

on this data, how many lasagna dinners are likely to be needed for a flight with 360 passengers? Answer correctly for 100 points!

1 answer:

MArishka [77]3 years ago

8 0

Answer:

3 times 25 = 75

Step-by-step explanation:

Plz vote Brainliest

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A sample of 900 college freshmen were randomly selected for a national survey. Among the survey participants, 372 students were

Rufina [12.5K]

Answer:

a) $ME=2.58 \sqrt{\frac{0.413(1-0.413)}{900}}=0.0423$

b) $0.413 - 2.58 \sqrt{\frac{0.413(1-0.413)}{900}}=0.371$

Step-by-step explanation:

1) Data given and notation

n=900 represent the random sample taken

X=372 represent the students were pursuing liberal arts degrees

$\hat p=\frac{372}{900}=0.413$ estimated proportion of students were pursuing liberal arts degrees

$\alpha=0.01$ represent the significance level

z would represent the statistic (variable of interest)

$p_v$ represent the p value (variable of interest)

p= population proportion of students were pursuing liberal arts degrees

2) Solution to the problem

The confidence interval would be given by this formula

$\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}$

For the 99% confidence interval the value of $\alpha=1-0.99=0.01$ and $\alpha/2=0.005$ , with that value we can find the quantile required for the interval in the normal standard distribution.

$z_{\alpha/2}=2.58$

The margin of error is given by:

$ME=z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}$

If we replace we have:

$ME=2.58 \sqrt{\frac{0.413(1-0.413)}{900}}=0.0423$

And replacing into the confidence interval formula we got:

$0.413 - 2.58 \sqrt{\frac{0.413(1-0.413)}{900}}=0.371$

$0.413 + 2.58 \sqrt{\frac{0.413(1-0.413)}{900}}=0.455$

And the 99% confidence interval would be given (0.371;0.455).

We are confident (99%) that about 37.1% to 45.5% of students were pursuing liberal arts degrees.

7 0

3 years ago

35 + 3 x n with n = 7

Vlad [161]

56 would be the answer

4 0

3 years ago

Read 2 more answers

Mark reads 42 pages of a book every 3/4 hour. Write an equation that models the relationships between x, the number of hours Mar

Illusion [34]

Answer:

The equation that models the relationships between $x$ , the number of hours Mark reads, and , $y$ the number of pages of the book he reads is:

$y=56x$

Step-by-step explanation:

Given:

Mark reads 42 pages every $\frac{3}{4}$ hour.

The number of hours is given by = $x$

The number of pages is given by = $y$

The equation can be modeled as:

$y=mx+b$

where $m$ represents rate of change and $b$ represents the y-intercept or the initial value.

Rate of change = $=\frac{Change\ in\ y}{Change\ in\ x}=\frac{42}{\frac{3}{4}}=42\times \frac{4}{3}=56$

The initial value $b=0$ as Mark starts reading from 0.

So, the equation is:

$y=56x$

7 0

3 years ago

How do you this? Whoever shows full work, I’ll mark brainlist

Gennadij [26K]

Answer:

hese angles are supplementary, and x=19 degrees

These two angles are a linear pair, meaning that they are supplementary.

This means that their angles measures must add up to 180 degrees.

65+6x+1=180

6x=114

x=19

Hope this helps!

Step-by-step explanation:

4 0

3 years ago

The rules of a contest say that there is a 6% chance of winning a prize. Two hundred people enter the contest. Predict how many

Oxana [17]

6% of 200

.06 × 200

12

The answer is 12

7 0

4 years ago