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Klio2033 [76]
3 years ago
5

I really need help!Please help me

Mathematics
1 answer:
sergejj [24]3 years ago
5 0
I’m not really good at explaining in words but I hope this picture of my work helps. (Sorry for sloppy writing)

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"You measure 34 dogs' weights, and find they have a mean weight of 67 ounces. Assume the population standard deviation is 13.5 o
liraira [26]

Answer:

The 95% confidence interval for the true population mean dog weight is between 62.46 ounces and 71.54 ounces.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.96*\frac{13.5}{\sqrt{34}} = 4.54

The lower end of the interval is the sample mean subtracted by M. So it is 67 - 4.54 = 62.46 ounches.

The upper end of the interval is the sample mean added to M. So it is 67 + 4.54 = 71.54 ounces.

The 95% confidence interval for the true population mean dog weight is between 62.46 ounces and 71.54 ounces.

7 0
3 years ago
75km/h compute in m/s
Vlad1618 [11]
75 * 1000/3600 = 20.8333333

You just need to multiply with 1000 to get m from km and divide by 3600 because you are converting hours in seconds.
8 0
3 years ago
In Figure 1, the battery inside the flashlight contains energy that is usually stored in the form of________.
inysia [295]

Answer:

C. chemical energy is what it's stored in the form of

4 0
3 years ago
You earned 90% on a science quiz. You answered 27 questions correctly. How many questions were on the test?
Scilla [17]

Answer:

There were 30 questions on the test.

Step-by-step explanation:

1. Set up your equation: 27/90 = y/100

2. Next you want to cross multiply: 2700 = 90y or 270 = 9y

3. Divide 270 by 9 to find your y: y = 30

There were 30 questions on the test.

7 0
3 years ago
Write as a decimal. If a repeating decimal, round to the nearest hundredth.
Mamont248 [21]

Given:

\frac{475}{80}

Let's evaluate and find the quotient.

We have:

\frac{475}{80}=5.9375

SInce it is not a repeating decimal, we are asked to leave to answer as it is.

A repeating decimal is a decimal with digits or group of digits that repeats endlessly.

The decimal 5.937

ANSWER:

5.9375

6 0
1 year ago
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