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2 years ago

Fiona has a play yard for her dog. She mows the yard in 8 equal rows. Each row has 41.75 square feet.

2 answers:

7 0

Answer: the answer that actually makes since is multiply 8 times 41.75 that also equals out to 334 which would be accurate

Step-by-step explanation:

fgiga [73]2 years ago

5 0

Answer:

multiply 8 times 41.75

Step-by-step explanation:

i got it right on my test

Guest

1 year ago

walking the spot 30 on me wit some chops essfalayaaaaaaaaaaa all my niggers in control ________________

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Miguel wrote the predicted and residual values for a data set using the line of best fit y = 1.82x – 4.3. He left out two of the

Dmitry_Shevchenko [17]

Answer:

Step-by-step explanation:

i think it was c

5 0

2 years ago

Read 2 more answers

A probability calculator is required on this problem; answer to six decimal places. Suppose we will spin the wheel pictured 400

KiRa [710]

Answer:

$P(90< X< 110)= P(\frac{90-80}{8}$

And we can find this probability with this difference:

$P(90< X< 110)=P(z$

And we can find the real value with the following excel code using the binomial distribution:

"=BINOM.DIST(110,400,0.2,TRUE)-BINOM.DIST(89,400,0.2,TRUE)"

And we got 0.118 a very close value from the value obtained using the normal approximation

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=400, p=0.2)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

We need to check the conditions in order to use the normal approximation.

$np=400*0.2=80 \geq 10$

$n(1-p)=400*(1-0.2)=320 \geq 10$

So we see that we satisfy the conditions and then we can apply the approximation.

If we appply the approximation the new mean and standard deviation are:

$E(X)=np=400*0.2=80$

$\sigma=\sqrt{np(1-p)}=\sqrt{400*0.2(1-0.2)}=8$

So then we can approximate the random variable as $X \sim N(\mu = 80, \sigma = 8)$

And we want this probability:

$P(90< X< 110)$

We can use the z score formula given by:

$z = \frac{x -\mu}{\sigma}$

And replacing we got:

$P(90< X< 110)= P(\frac{90-80}{8}$

And we can find this probability with this difference:

$P(90< X< 110)=P(z$

And we can find the real value with the following excel code using the binomial distribution:

"=BINOM.DIST(110,400,0.2,TRUE)-BINOM.DIST(89,400,0.2,TRUE)"

And we got 0.118 a very close value from the value obtained using the normal approximation

8 0

2 years ago

Forty-two percent of primary care doctors think their patients receive unnecessary medical care (reader's digest, december 2011/

igomit [66]

Answer:

The standard error is 0.02849

Step-by-step explanation:

<u>Explanation:</u>-

given data is 42% of primary case doctors think their patients receive un-necessary medical care.

That is The proportion 'p' = 42% = 0.42

Given sample size is n =300

The standard error of the sampling distribution of the sample proportion is

$se (p) = \frac{\sqrt{p(1-p)} }{\sqrt{n} }$

$se (p) = \frac{\sqrt{0.42(1-0.42))} }{\sqrt{300} }$

use calculator on simplification , we get

standard error = 0.02849

5 0

2 years ago

Sonia rolls a six-sided number cube 12 times and records if she rolls a 2. What is the number of trials for this binomial experi

Anarel [89]

<span>In the binomial experiment, the number of times the six-sided cube was rolled is the number of trials. Thus the number of trials for this binomial experiment is 12. The formular for a binomial experiment is nCx (p)^x (q)^(n - x) where: n is the number of trials, x is the success event, p is the probability of success, q is the probability of failure.</span>

7 0

2 years ago

Read 2 more answers

A family recycled 66 cans in February, 94 cans in March, 122 cans in April, and 150 cans in May. If this pattern went from Janua

fredd [130]

Step-by-step explanation:

Difference per month = 28

=> January = February - 28 = 66-28 = 38

3 0

2 years ago