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Gnoma [55]
3 years ago
10

Assume for a given study that the null hypothesis asserts the expected value of a phenomenon is 10. A research study results in

a 95% confidence interval reported as [7.142, 9.865]. What decision would you make based on this confidence interval
Mathematics
1 answer:
soldi70 [24.7K]3 years ago
8 0

Answer:

I would reject the null hypothesis because it falls outside of the 95% confidence interval.

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X^2 + 4x = 6<br> solve by completing the square plz show step by step
Hitman42 [59]

Answer:

x = -2 ±sqrt( 10)

Step-by-step explanation:

x^2 + 4x = 6

Take the coefficient of x

4

Divide by 2

4/2 =2

Square it

2^2 =4

Add this to each side

x^2 + 4x+4 = 6+4

Take the 4/2 term which is the factor inside the (x+   )^2

(x+2)^2 = 10

Take the square root of each side

sqrt((x+2)^2) =±sqrt( 10)

x+2 = ±sqrt( 10)

Subtract 2 from each side

x+2-2 = -2±sqrt( 10)

x = -2 ±sqrt( 10)

8 0
3 years ago
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Two numbers add to 251 and the second is 41 bigger then the first. what are the two numbers?
PIT_PIT [208]
\left\{\begin{array}{ccc}x+y=251\\y=x+41\end{array}\right\\\\substitute:\\\\x+x+41=251\\2x+41=251\ \ \ \ /-41\\2x=210\ \ \ /:2\\x=105\\\\y=105+41=146\\\\Answer:105\ and\ 146.
6 0
3 years ago
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Darcy harvest 8 3/4 acres of corn every 5/6 of an hour. How many acres per hour?
otez555 [7]

Answer:

The answer is 10\frac{1}{2}\ per\ hour.

Step-by-step explanation:

Given:

Darcy harvest 8 3/4 acres of corn every 5/6 of an hour.

Now, to find the acres per hour it takes to harvest.

Darcy harvest = 8\frac{3}{4}=\frac{35}{4}\ acres.

The time he took to harvest = \frac{5}{6}\ hour.

So, to get the acres per hour we put formula:

Distance = \frac{35}{4}\ acres.

Time=\frac{5}{6}\ hour.

Speed=\frac{distance}{time}

Speed=\frac{\frac{35}{4}}{\frac{5}{6}}

Speed=\frac{35}{4}\times \frac{6}{5}

Speed=\frac{210}{20}

Speed=\frac{21}{2}

Speed=10\frac{1}{2}\ per\ hour.

Therefore, the answer is 10\frac{1}{2}\ per\ hour.

3 0
3 years ago
Reagan solved 5.25 ÷ 5 and got 105. What did Reagan do wrong?
horrorfan [7]

Answer:

he forgot to put the decimal point

Step-by-step explanation:

answer is 1.05.

4 0
3 years ago
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There are 24 books on the bookcase 3/4 of these books are science fiction how many books are science fiction
jok3333 [9.3K]

Answer:

<u>18 of the books are science fiction.</u>

Step-by-step explanation:

24/4 = 6

Science fiction - 6+6+6 = 18

Not science fiction - 24 - 18 = 6

7 0
4 years ago
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