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2 years ago

Jeremiah can make 3 out of the 5 goals he attempts to score at every game. Alex can make

Mathematics

1 answer:

Reika [66]2 years ago

6 0

Answer:

40%

Step-by-step explanation:

3 out of 5 = 60 out of 100

if he scores 60 out of 100 = he miss 40 goals

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2 years ago

PLEASE ANSWER QUICKLY!!! La'Shaun is knitting a scarf for her brother. It took her 1/3 hour to knit 1/2 of a scarf how fast is L

saveliy_v [14]

Answer:

Fast

Step-by-step explanation:

1/3 hour is 20 minutes

so that means it will take her 40 minutes to make the whole scarf.

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2 years ago

A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained i

Scorpion4ik [409]

Answer:

a) We need a sample size of at least 3109.

b) We need a sample size of at least 4145.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

(a) he uses a previous estimate of 25%?

we need a sample of size at least n.

n is found when $M = 0.02, \pi = 0.25$ . So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.02 = 2.575\sqrt{\frac{0.25*0.75}{n}}$

$0.02\sqrt{n} = 2.575\sqrt{0.25*0.75}$

$\sqrt{n} = \frac{2.575\sqrt{0.25*0.75}}{0.02}$

$(\sqrt{n})^{2} = (\frac{2.575\sqrt{0.25*0.75}}{0.02})^{2}$

$n = 3108.1$

We need a sample size of at least 3109.

(b) he does not use any prior estimates?

When we do not use any prior estimate, we use $\pi = 0.5$

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.02 = 2.575\sqrt{\frac{0.5*0.5}{n}}$

$0.02\sqrt{n} = 2.575\sqrt{0.5*0.5}$

$\sqrt{n} = \frac{2.575\sqrt{0.5*0.5}}{0.02}$

$(\sqrt{n})^{2} = (\frac{2.575\sqrt{0.5*0.5}}{0.02})^{2}$

$n = 4144.1$

Rounding up

We need a sample size of at least 4145.

8 0

3 years ago

Museum A charges an entrance fee of $8.00 and $2.25 per souvenir map. Museum B charges an entrance fee of $6.00 and $2.75 per so

ruslelena [56]

Answer:Answer is 4 i just took the test and it was correct your welcome

Step-by-step explanation:

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2 years ago

Which composition of transformations below will map figure K onto figure S and then onto figure U?

Dmitrij [34]

Ok from the given the best choice to go with will be option B because its going from an up right and its going to flip and rotate.

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2 years ago

Read 2 more answers