Find the unit rate 2.4 kilo in 3.75 minutes HELP!!!! thanks :) <3

The population standard deviation for the temperature of beers found in Scooter's Tavern is 0.26 degrees. If we want to be 90% c

siniylev [52]

Answer:

19 beers must be sampled.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.9}{2} = 0.05$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.05 = 0.95$ , so Z = 1.645.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

The population standard deviation for the temperature of beers found in Scooter's Tavern is 0.26 degrees.

This means that $\sigma = 0.26$

If we want to be 90% confident that the sample mean beer temperature is within 0.1 degrees of the true mean temperature, how many beers must we sample?

This is n for which M = 0.1. So

$M = z\frac{\sigma}{\sqrt{n}}$

$0.1 = 1.645\frac{0.26}{\sqrt{n}}$

$0.1\sqrt{n} = 1.645*0.26$

$\sqrt{n} = \frac{1.645*0.26}{0.1}$

$(\sqrt{n})^2 = (\frac{1.645*0.26}{0.1})^2$

$n = 18.3$

Rounding up:

19 beers must be sampled.

7 0

3 years ago

Find this expression in square form with process pls help me !!!!

alekssr [168]

Answer:

(p -3q )(p -3q )

Step-by-step explanation:

p'2 - 6pq + 9q'2

(p -3q )(p -3q )

find two values that add to give 6 and multiply to 9

p x p =p'2

-3q x p = -3pq -3 x pq = -3pq ...... -3pq - 3pq = -6pq

-3q x - 3q = 9q'2

7 0

2 years ago

What's the property of 8x-1=-8

Ivanshal [37]

x=-7/8 is the correct answer. First you had to add by 1 from both sides of equation, and it gave us, $8x-1+1=-8+1$ . And then simplify, and it gave us, $8x=-7$ . You can also divide by 8 from both sides of equation, and it gave us, $\frac{8x}{8}=\frac{-7}{8}$ . And finally simplify, and it gave us the answer is x=-7/8 is the correct answer. Hope this helps! And thank you for posting your question at here on brainly, and have a great day. -Charlie

8 0

4 years ago

I cant remember plz help me

anygoal [31]

Answer:

I believe the answer is B. Angle-Angle-Side

Step-by-step explanation:

3 0

3 years ago

Which of the following measures of central tendency describe the distribution of a data set?

kicyunya [14]

Answer:

Mean, Median, and Mode

Step-by-step explanation:These measures indicate where most values in a distribution fall and are also referred to as the central location of a distribution.

3 0

4 years ago

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