Please help with picture below.

1 answer:

Bess [88]3 years ago

7 0

Answer:

10.5 cm

Step-by-step explanation:

Since we know that O lies on AB we know that:

You can add 6 to 4.5 to get 10.5 cm.

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WARRIOR [948]

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Answer:

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Step-by-step explanation:

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Leya [2.2K]

Answer:

$2800

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Harrizon [31]

Using confidence interval concepts, it is found that:

a) The point estimate is the sample mean.

b) The confidence interval is: $\overline{x} \pm T\frac{s}{n}$

c) If $1411 is between the bounds of the interval yes, otherwise no.

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At item a, it asks to provide a point estimate for the population mean, which is the sample mean $\overline{x}$

--------------

Item b:

In the spreadsheet, it is possible to find the <em>standard deviation for the sample</em>, thus, the t-distribution is used.
The confidence interval will be given by:

$\overline{x} \pm T\frac{s}{n}$

In which:

$\overline{x}$ is the sample mean.
T is the critical value, from the t-distribution, with a two-tailed area of $\frac{1 - 0.95}{2} = 0.025$ and n-1 degrees of freedom.
s is the standard deviation for the sample.
n is the sample size.