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3 years ago

Im serious this time is it appropriate to use a old notebook for a new class in highschool?

Mathematics

1 answer:

zlopas [31]3 years ago

6 0

Answer:

Of course it is!

Step-by-step explanation:

You might want to have a separator, so you know what page your new year textbook starts. I hope this is a food tip to save money!

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A research group needs to determine a 90% confidence interval for the mean repair cost for all car insurance small claims. From

lutik1710 [3]

Answer:

a) $z = 1.645$

b) The should sample at least 293 small claims.

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 Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$ , which means that the answer of question a is 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.

(b) If the group wants their estimate to have a maximum error of $12, how many small claims should they sample?

They should sample at least n small claims, in which n is found when

$M = 12, \sigma = 124.88$ . So

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

$12 = 1.645*\frac{124.88}{\sqrt{n}}$

$12\sqrt{n} = 205.43$

$\sqrt{n} = \frac{205.43}{12}$

$\sqrt{n} = 17.12$

$\sqrt{n}^{2} = (17.12)^{2}$

$n = 293$

The should sample at least 293 small claims.

8 0

3 years ago

Smedley has two rolls of crepe paper, one with 30 yards and one with 40 yards. If he cuts both rolls into 5-yard streamers, how

Nastasia [14]

Answer:

He will have 14 streamers

6 0

3 years ago

Read 2 more answers

Is 32.5 greater or less than 30.8<br><br>PLEASE HELP QUICKLY AS POSSIBLE THANK YOU :)

ivann1987 [24]

Answer:

32.5 is greater than 30.8

6 0

3 years ago

Read 2 more answers

NEED HELP ASAP SOMEONE PLEASE!!!!

Alisiya [41]

Answer: The state with the second lowest population has the lowest population density.

Step-by-step explanation:

Since, Density = Population / Area

The population of state A = 1,055,173

Its area = 2677 square km

Thus, the density of state A = $\frac{1055173}{2677}$ = 394.162495,

The population of state B = 1,333,089

Its area = 36,418 square km

Thus, the density of state B = $\frac{1,333,089}{36,418}$ = 36.6052227,

The population of state C = 3,596,677

Its area = 5543 square km

Thus, the density of state C = $\frac{3,596,677}{5543}$ = 648.868302,

The population of state D =6,745,408

Its area = 10555 square km

Thus, the density of state D = $\frac{6,745,408}{10555}$ = 639.072288,

Since, by the above explanation,

The state in increasing order of the populations,

State A < State B < State C < State D,

Also, the state in increasing order of density,

State B < State A < State D < State C

⇒ Second option is correct.

3 0

4 years ago

What is another way to write 300+20+5?

Helga [31]

300+5+20 COULD BE ONE WAY

7 0

3 years ago

Read 2 more answers