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max2010maxim [7]
2 years ago
12

PLEASE HELP 100 points AND brainlieest

Mathematics
2 answers:
7nadin3 [17]2 years ago
8 0

Answer:

2, 8, 45

Step-by-step explanation:

based off the one completed part of the table I decided that it would make sense if the time was multiplied by 3 to get the distance. So to complete these I divided or multiplied by 3 to find what to put in each box.

- For the first box I did 6/3 and found 2

- For the second box 24/3 = 8

- For the last box 15 x 3 = 45

this isnt my best area so please let me know if I got anything wrong but I think this is correct. Hope this helps!!

Free_Kalibri [48]2 years ago
6 0

Answer:

first row: 3 and 9 Second row: 30

Step-by-step explanation:

it looks like you are just adding 6 as you go up. random guess so prob wrong. sorry.

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Answer:

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

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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}

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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).

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