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2 years ago

PLeasssssssseeee answer

Mathematics

1 answer:

abruzzese [7]2 years ago

4 0

Answer:

The answer is A

Step-by-step explanation:

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A paint company claims their paint will be completely dry within 45 minutes after application. Recently, customers have complain

Angelina_Jolie [31]

Answer:

The probability of observing a sample mean of x = 52 or greater from a sample size of 25 is 0.0000026

Step-by-step explanation:

Mean = $\mu = 45$

Population standard deviation = $\sigma = 6$

Sample size = n =25

Sample mean = $\bar{x} = 52$

We are supposed to find the probability of observing a sample mean of x = 52 or greater from a sample size of 25 i.e. $P(x\geq 52)$

$Z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}\\Z=\frac{52-45}{\frac{6}{\sqrt{25}}}$

Z=5.83

P(Z<52)=0.9999974

$P(Z\geq 52)=1-P(z$

Hence the probability of observing a sample mean of x = 52 or greater from a sample size of 25 is 0.0000026

3 0

3 years ago

I NEED HELP ON THIS PLZ ASAP!!!

podryga [215]

Answer:

The answer is B.

Step-by-step explanation:

Hope it helps!!

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2 years ago

Segment Addition Postulate Task Cards

Mandarinka [93]

Oppor it plenty no flow
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3 years ago

Natalie walked 3/5 mile in 1/2 hour. How fast did she walk, in miles per hour

V125BC [204]

Answer:

6/5 miles per hour or 1.2 miles per hour

Step-by-step explanation:

If Natalie walked 3/5 miles in 1/2 hour, then in 1 hour she would have walker 6/5 miles(3/5 * 2). You can write 6/5 as 1.2 (6 divided by 5). Thus, Natalie walked 1.2 miles per hour

4 0

2 years ago

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A test that is valid must have scores that fit a normal curve A be reliable B be normed on a random sample C predict future beha

sasho [114]

Answer:

A: be reliable

Step-by-step explanation:

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3 years ago