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gayaneshka [121]
3 years ago
7

Any help would be cool thaanks

Mathematics
1 answer:
Nikolay [14]3 years ago
6 0

Answer:

I Can help you! what do y need help on?

Step-by-step explanation:

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It is important that face masks used by firefighters be able to withstand high temperatures because firefighters commonly work i
USPshnik [31]

Answer:

The 93% confidence interval for the true proportion of masks of this type whose lenses would pop out at 325 degrees is (0.3154, 0.5574). This means that we are 93% sure that the true proportion of masks of this type whose lenses would pop out at 325 degrees is (0.3154, 0.5574).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 55, \pi = \frac{24}{55} = 0.4364

93% confidence level

So \alpha = 0.07, z is the value of Z that has a pvalue of 1 - \frac{0.07}{2} = 0.965, so Z = 1.81.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4364 - 1.81\sqrt{\frac{0.4364*0.5636}{55}} = 0.3154

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4364 + 1.81\sqrt{\frac{0.4364*0.5636}{55}} = 0.5574

The 93% confidence interval for the true proportion of masks of this type whose lenses would pop out at 325 degrees is (0.3154, 0.5574). This means that we are 93% sure that the true proportion of masks of this type whose lenses would pop out at 325 degrees is (0.3154, 0.5574).

8 0
3 years ago
Raina wants to paint the ceiling of her restaurant. The ceiling is in the shape of a square. Its side lengths are 55 feet. Suppo
Ksju [112]

area of the ceiling = 55 x 55 = 3025 square feet

 3025/275 = 11 cans

8 0
3 years ago
3 - x3 > -4 help pls
Kamila [148]

Answer:

x<1.912931

Step-by-step explanation:

6 0
3 years ago
HELP ASAP
IrinaVladis [17]

Answer:

y-5=(x-6)?

Step-by-step explanation:

Hope this helped!

-BB

3 0
3 years ago
Allen subtracts (11x + y) from (ax + 6y). His correct answer is − 10x + 5y. What is the value of a?
castortr0y [4]
A=1

Here is a picture. Please notify me if I made an error!
7 0
2 years ago
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