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STatiana [176]
3 years ago
13

Find the length of AB¯¯¯¯¯¯ to the nearest hundredth.

Mathematics
1 answer:
alukav5142 [94]3 years ago
5 0

Answer:

it will be b

Step-by-step explanation:

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Connecticut families were asked how much they spent weekly on groceries. Using the following data, construct and interpret a 95%
Amanda [17]

Answer:

The 95% confidence interval for the population mean amount spent on groceries by Connecticut families is ($73.20, $280.21).

Step-by-step explanation:

The data for the amount of money spent weekly on groceries is as follows:

S = {210, 23, 350, 112, 27, 175, 275, 50, 95, 450}

<em>n</em> = 10

Compute the sample mean and sample standard deviation:

\bar x =\frac{1}{n}\cdot\sum X=\frac{ 1767 }{ 10 }= 176.7

s= \sqrt{ \frac{ \sum{\left(x_i - \overline{x}\right)^2 }}{n-1} }       = \sqrt{ \frac{ 188448.1 }{ 10 - 1} } \approx 144.702

It is assumed that the data come from a normal distribution.

Since the population standard deviation is not known, use a <em>t</em> confidence interval.

The critical value of <em>t</em> for 95% confidence level and degrees of freedom = n - 1 = 10 - 1 = 9 is:

t_{\alpha/2, (n-1)}=t_{0.05/2, (10-1)}=t_{0.025, 9}=2.262

*Use a <em>t</em>-table.

Compute the 95% confidence interval for the population mean amount spent on groceries by Connecticut families as follows:

CI=\bar x\pm t_{\alpha/2, (n-1)}\cdot\ \frac{s}{\sqrt{n}}

     =176.7\pm 2.262\cdot\ \frac{144.702}{\sqrt{10}}\\\\=176.7\pm 103.5064\\\\=(73.1936, 280.2064)\\\\\approx (73.20, 280.21)

Thus, the 95% confidence interval for the population mean amount spent on groceries by Connecticut families is ($73.20, $280.21).

7 0
3 years ago
A33 =<br> 1<br> 6<br> 8<br> Please help.
Firdavs [7]

Answer:

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Step-by-step explanation:

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3 years ago
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How do you solve 5 1/4 - 2 3/4
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5 \frac{1}{4 } - 2  \frac{3}{4}

\frac{21}{4}  -  \frac{11}{4}

\frac{21 - 11}{4}

\frac{10}{4}

\frac{5}{2}

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3 years ago
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Cobert 5 feet to to meters to the nearest hundredths place​
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1.5 meters

There is 30 cm in a foot and 5 feet times 30 is 150. There is 100 cm in a meter so 150/100 is 1.5 meters.
6 0
3 years ago
21 POINTS AND BRAINLEIST
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Answer: The answer is D The difference between Shelly's and Terrence's total points

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