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3 years ago

What decimal is equilvalent to 3/8

Mathematics

2 answers:

Stolb23 [73]3 years ago

4 0

Answer:

0.375

Step-by-step explanation:

Yuri [45]3 years ago

4 0

Answer:

0.375.....................

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A candy factory that produces chocolate bars claims each bar weighs 50 grams, at least that is what is printed on the label. Of

Romashka [77]

Answer:

Question 1

The correct option is A

Question two

The correct option is B

Question three

$SE= 0.5$

Question four

$z = - 3$

Question five

The correct option is A

Step-by-step explanation:

The population mean is $\mu = 50 \ grams$

The sample size is n = 16

The population size is N = 4000

The sample mean is $\= x = 48.5 \grams$

The standard deviation is $s = 2 \ gram(s)$

Considering the first question

The correct option is A

z test because the SD of the population is known and the weights follow the normal curve

Considering the second question

The correct option is B

Yes, because with only 20 observations the sample SD is not a great estimate of the true population SD.

Considering the third question

Generally the standard error is mathematically represented as

$SE= \frac{s }{\sqrt{n} }$

=> $SE= \frac{2 }{\sqrt{16} }$

=> $SE= 0.5$

The null hypothesis is $H_o : \mu = 50$

The alternative hypothesis is $H_a : \mu < 50$

Generally the test statistics is mathematically represented as

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

=> $z = \frac{ 48.5 - 50 }{ 0.5}$

=> $z = - 3$

Generally the p-value is mathematically represented as

$p-value = P(Z < z )$

=> $p-value = P(Z < - 3 )$

From the z-table the

$P(Z < - 3 ) =0.0013499$

=> $p-value = 0.0013499$

From the obtained values we see that

$p-value < \alpha$

So we reject the null hypotheses

The conclusion

it's very unlikely that the factory is making the candy bars 50 grams as they claim

5 0

3 years ago

Multiple-choice questions each have four possible answers (a comma b comma c comma d ), one of which is correct. Assume that y

Ray Of Light [21]

Answer:

0.140625

Step-by-step explanation:

Given that multiple-choice questions each have four possible answers (a comma b comma c comma d ), one of which is correct. Assume that you guess the answers to three such questions.

Each question is independent of the other with constant probability

p = Prob for correct guess = 1/4 = 0.25

q = prob for wrong guess = 1-p = 0.75

Hence

$P(CWW)\\= P(C)*P(W)*P(W)$ , since each question is independent of the other

= $0.25*0.75*0.75\\= 0.140625$

8 0

4 years ago

Covert 120 miles per hour to feet per second

aksik [14]

633,600 ft. per hour I used a calculator converter so its a 100% right

3 0

3 years ago

Read 2 more answers

Free points: this is because of all the kindness I have seen on brainly:

Y_Kistochka [10]

The answer to 5x5 is 25

6 0

3 years ago

Read 2 more answers

A bulb after certain testing had a life of 25 months. The standard deviation based on this sample of size one is

lapo4ka [179]

Answer:

<h2>25 months</h2>

Step-by-step explanation:

Using the formula for calculating the standard error of the mean to get the standard deviation. The standard error of the mean is expressed as;

SE = S/√n where;

S is the standard deviation

n is the sample size

Given SE = 25 months and n = 1, on substituting this parameters into the formula, we will have;

25 = S/√1

25 = S/1

cross multiply

S = 25*1

S = 25 months

<em>Hence the standard deviation based on the sample is 25 months</em>

8 0

3 years ago