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earnstyle [38]
3 years ago
6

A cookie factory uses 1/5 of a bag of flour in each batch of cookies. The factory used 3/5 of a bag of flour yesterday. How many

batches of cookies did the factory make?

Mathematics
2 answers:
Anni [7]3 years ago
7 0
The factory made 3 batches of cookies. 
(See my work below)

JulijaS [17]3 years ago
3 0
In total they made 3 batches
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Using the t-distribution, it is found that the 95% confidence interval for the mean number of people the houses were shown is (20.1, 27.9).

We have the <u>standard deviation for the sample</u>, hence the t-distribution is used to build the confidence interval. Important information are given by:

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The confidence interval is:

\overline{x} \pm t\frac{s}{\sqrt{n}}

In which t is the critical value for a <u>95% confidence interval with 23 - 1 = 22 df</u>, thus, looking at a calculator or at the t-table, it is found that t = 2.0739.

Then:

\overline{x} - t\frac{s}{\sqrt{n}} = 24 - 2.0739\frac{9}{\sqrt{23}} = 20.1

\overline{x} + t\frac{s}{\sqrt{n}} = 24 + 2.0739\frac{9}{\sqrt{23}} = 27.9

The 95% confidence interval for the mean number of people the houses were shown is (20.1, 27.9).

A similar problem is given at brainly.com/question/15180581

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