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1 year ago

10 (2)+1(2) how do u solve this problem?

Mathematics

2 answers:

yarga [219]1 year ago

7 0

$\huge\textsf{Hey there!}$

$\huge\text{10(2) + 1(2)}$

$\huge\text{= 10 + 10 + 1 + 1}$

$\huge\text{= 20 + 1 + 1}$

$\huge\text{= 21 + 1}$

$\huge\text{= 22}$

$\huge\textsf{Therefore, your answer should be:}$

$\huge\boxed{\frak{22}}\huge\checkmark$

$\huge\textsf{Good luck on your assignment \& enjoy your day!}$

~ $\frak{Amphitrite1040:)}$

Ilya [14]1 year ago

4 0

Answer:22

Step-by-step explanation:

10x2+1x2=

20+2

=22

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The 95% confidence interval is given by (25.71536 ;28.32464)

And if we need to round we can use the following excel code:

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Step-by-step explanation:

Notation and definitions

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$\bar X= 27.2$ represent the sample mean

$s=5.83$ represent the sample standard deviation

m represent the margin of error

Confidence =88% or 0.88

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".

Calculate the critical value tc

In order to find the critical value is important to mention that we don't know about the population standard deviation, so on this case we need to use the t distribution. Since our interval is at 88% of confidence, our significance level would be given by $\alpha=1-0.88=0.12$ and $\alpha/2 =0.06$ . The degrees of freedom are given by: