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kirill115 [55]
3 years ago
6

Will mark brainliest please help

Mathematics
1 answer:
Brut [27]3 years ago
5 0

Answer:

6*10^-9

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the

10

. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

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A survey of 85 families showed that 36 owned at least one DVD player. Find the 99% confidence interval estimate of the true prop
attashe74 [19]

Answer:

0.424 - 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.286

0.424 + 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.562

The 99% confidence interval would be given by (0.286;0.562)

Step-by-step explanation:

Information given:

X= 36 represent the families owned at least one DVD player

n= 85 represent the total number of families

\hat p=\frac{36}{85}= 0.424 represent the estimated proportion of families owned at least one DVD player

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.05. And the critical value would be given by:

z_{\alpha/2}=-2.58, z_{1-\alpha/2}=2.58

The confidence interval for the mean is given by the following formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

If we replace the values obtained we got:

0.424 - 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.286

0.424 + 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.562

The 99% confidence interval would be given by (0.286;0.562)

8 0
3 years ago
Choose the correct answer to 1,889/36.<br> 42 R17<br> 51 R53<br> 52 R15<br> 52 R17
ozzi

Answer:

52 R17

Step-by-step explanation:

52 * 36 = 1872

1889 - 1872 = 17

--> 52 R17

3 0
3 years ago
Read 2 more answers
What is 3/8 times 45%
bazaltina [42]

Answer:

0.16875

Step-by-step explanation:

5 0
3 years ago
Samantha is in a book club. She has read 7 books this month. Her book club requires her to read 4 books in one month. How many
kirill [66]

Answer:

3

Step-by-step explanation:

Hope this helps please mark me brainliest :)

8 0
3 years ago
Pepper jackie purchased 3.5 pounds of jelly beans for 1.19 per pund. How much did she spend on jelly beans, to the nearest cent
Pani-rosa [81]

Answer:

416.5 cent Pepper jackie  spend on jelly beans .

Step-by-step explanation:

As given

Pepper jackie purchased 3.5 pounds of jelly beans for $1.19 per pound.

Thus

$1.19 = 1 pound

Cost of 3.5 pounds of jelly beans = 1.19 × 3.5

                                                       = $4.165

Therefore the cost of 3.5 pounds of jelly beans is  $4.165 .

As 1 dollar = 100 cent

 $4.165  = 4.165 × 100

              = 416.5 cent

Therefore 416.5 cent Pepper jackie  spend on jelly beans .



6 0
3 years ago
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