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Papessa [141]
2 years ago
8

A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that

whenever this process is in control, package weight is normally distributed with a mean of 20 ounces and a standard deviation of two ounces. Each day last week, he randomly selected four packages and weighed each: Day Weight (ounces) Monday 23 22 23 24 Tuesday 23 21 19 21 Wednesday 20 19 20 21 Thursday 18 19 20 19 Friday 18 20 22 20 What is the sample mean package weight for Thursday
Mathematics
1 answer:
rosijanka [135]2 years ago
3 0

Using it's concept, it is found that the sample mean package weight for Thursday is of 19 ounces.

<h3>What is the mean of a data-set?</h3>

The mean of a data-set is given by the <u>sum of the observations divided by the number of observations</u>.

For Thursday, the package weights in ounces are given by: {18, 19, 20, 19}.

Hence, the sample mean in ounces is of:

M = (18 + 19 + 20 + 19)/4 = 19.

More can be learned about the mean concept at brainly.com/question/24628525

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An exam consists of 50 multiple choice questions. Based on how much you studied, for
Ann [662]

Using the Central Limit Theorem, it is found that the sampling distribution of the sample proportion of the 50 questions on which you get the correct is approximately normal, with mean of 0.7 and standard error of 0.0648.

<h3>What does the Central Limit Theorem state?</h3>

It states that for a proportion p in a sample of size n, the sampling distribution of sample proportion is approximately normal with mean \mu = p and standard deviation s = \sqrt{\frac{p(1 - p)}{n}}, as long as np \geq 10 and n(1 - p) \geq 10.

In this problem, we have that p = 0.7, n = 50, hence the mean and the standard deviation are given as follows:

\mu = p = 0.7

s = \sqrt{\frac{p(1 - p)}{n}} = \sqrt{\frac{0.7(0.3)}{50}} = 0.0648

More can be learned about the Central Limit Theorem at brainly.com/question/24663213

5 0
2 years ago
WILL GIVE A CROWN OR WHATEVER ITS CALLED HELP ME ALSO WITH SPECIFIC ANSWERS SPLEASE
Mandarinka [93]

Answer:

width= 6

Step-by-step explanation:

equation: 50=2(2w-5)+ 2w     w= width

50=6w-10

60=6w

w=6

7 0
3 years ago
I= $169.67,P= $2000,t= 8 months
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If ur trying to find the rate its 12.7252%

Step-by-step explanation:

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serious [3.7K]

Answer:375

Step-by-step explanation:

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Cheryl moves houses. Her old house is 3 kilometers from her new house. How many meters is it from the old house to the new house
d1i1m1o1n [39]

Answer:

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