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2 years ago

I have tried this problem multiple times now and don't get the correct answer. Please help!

Mathematics

1 answer:

Vikentia [17]2 years ago

7 0

The confidence interval is (-1.1059, 7.70459).

<h3>What is confidence interval in statistics?</h3>

Image result for what is confidence interval

A confidence interval is the mean of your estimate plus and minus the variation in that estimate.

The sample mean is M=3.3

The sample size is N=44

So, σM= s/√N = 16.6/ √44

= 16.6/ 6.633

= 2.621

and, the degree of freedom

df= n-1

=44-1

=43

So, The t-value for a 90% confidence interval and 43 degrees of freedom is t=1.681.

Now, Margin of error = 2.261* 1.681 = 4.4059

Now, the lower and upper bound of the confidence interval are:

LL = 3.3- 4.40459 = -1.1059

UL = 3.3+ 4.40459 = 7.70459

Hence, the confidence interval is (-1.1059, 7.70459).

Learn more about this concept here:

brainly.com/question/14089556

#SPJ1

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1.875 quarts of pure pineapple juice should Theo add to a 20% pineapple drink.

<u><em>Explanation</em></u>

Suppose, $x$ quarts of pure pineapple juice should be added with 20% pineapple drink.

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3 years ago

What’s the answer for this?

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3 years ago

19 is what percent of 76?

Rudiy27

Greetings!

We can solve this problem by creating a simple equation:
Let <em>x</em> represent the percent.
$19=( \frac{x}{100})(76)$

Simplify.
$19=(\frac{x}{100})(\frac{76}{1})$

$19=(\frac{76x}{100})$

Multiply both sides by 100.
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$1900=76x$

Divide both sides by 76.
$\frac{1900}{76}= \frac{76x}{76}$

$25=x$

The Answer Is:
$\left[\begin{array}{ccc}x=25\end{array}\right]$

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