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adelina 88 [10]
2 years ago
10

you have one case of soap bars and there are 150 bars in a case you use 300 bars of soap per day how many cases do you need to o

rder to have for enough for 7 days
Mathematics
2 answers:
Serhud [2]2 years ago
6 0
21 barras de sabão por dia que precisa
Charra [1.4K]2 years ago
4 0
The Answer to your question is 14 cases for 7 days
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8090 [49]

Answer:

The confidence interval for the mean is given by the following formula:  

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

And the confidence interval is given by:

(0.123, 0.177)

And for this case the interval contains the value 0.16, so then we can conclude at 5% of significance that the true proportion is not different from 0.16

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{p(1-p)}{n}})

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

The confidence interval for the mean is given by the following formula:  

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

And the confidence interval is given by:

(0.123, 0.177)

And for this case the interval contains the value 0.16, so then we can conclude at 5% of significance that the true proportion is not different from 0.16

3 0
3 years ago
Paula has buttons. she gives away 28 buttons. choose the expression that shows the number of buttons paula has left.
mamaluj [8]

Answer:

y = 28 - x

Step-by-step explanation:

The variable x represents how many buttons Paula had before giving 28 away and the variable y represents how many buttons she has now.

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2 years ago
(40 points) !!!!!!!URGENT!!!!!! jack and jill both drive the same distance to the beach. by driving 15 mph faster than jack jill
Maslowich
Jill drives: 75mph
Jack driver 65 mph
7 0
3 years ago
Geometry help will give brainliest
Natali [406]
6x + 4x + 10 = 180
10x = 170
   x = 17

mCA = 4(17) + 10 = 68 + 10 = 78

Answer:
mCA = 78°
8 0
3 years ago
3) Tell whether the matrices are inverses of
Anettt [7]
These matrices ARE inverses of each other!
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