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Makovka662 [10]
4 years ago
8

You do a study of hypnotherapy to determine how effective it is in increasing the number of hours of sleep subjects get each nig

ht. You measure hours of sleep for 12 subjects with the following results. Construct a 95% and 99% confidence interval for the mean number of hours slept for the population (assumed normal) from which you took the data.
8.2 9.1 7.7 8.6 6.9 11.2 10.1 9.9 8.9 9.2 7.5 10.5
Mathematics
1 answer:
umka2103 [35]4 years ago
3 0

Answer:no

Step-by-step explanation:

jolu frcu

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Find the value of x.
dimaraw [331]

Answer:

2\sqrt{77}

Step-by-step explanation:

Use the Pythagorean theorem. a^{2} +b^{2}=c^{2}

a and b are the two side lengths

c is the hypotenuse (value across from the right angle)

Plug in the values that you are given.

a^{2} +4^{2} =18^{2}

Solve for x

x^{2} =18^{2} -4^{2}

x^{2} =308

x=\sqrt{308}

x=2\sqrt{77}

5 0
3 years ago
These figures are similar. What is the length of the missing side, x?
pshichka [43]

Answer:

5 ft

Step-by-step explanation:

the smaller one is 1/3 of the size of the bigger one

3 0
3 years ago
If a rectangle has perimeter of 70 a length of x and a width of x-9, find the value of the length of a rectangle
iren2701 [21]

Answer:

length = 22

width = 13

Step-by-step explanation:

Perimeter of a rectangle is given by the formula

P =2(l+w)

we know the length is x

width is x-9

P =70

Substituting this into the equation

70 = 2(x+x-9)

Combining like terms

70=2(2x-9)

Distributing the 2

70 = 4x-18

Adding 18 to each side

70+18 = 4x-18+18

88 = 4x

Divide by 4

88/4 = 4x/4

22= x

we know the length is x

length = 22

width is x-9

width = 22-9= 13

7 0
4 years ago
Read 2 more answers
In the given graph, line AB is reflected over the:
melamori03 [73]
Hey there!

The word reflected means when something is basically coping everything that you do. So, for example, when I look in a mirror, the mirror would reflect everything that I would do.

So, from looking at the graph above, as we should <em>remember </em>the \left[\begin{array}{ccc}\boxed{x-axis}\end{array}\right] is the axis that is (horizontal) and the y-axis is the axis that is (vertical).

So, from knowing this information of graphs, we now know that \left[\begin{array}{ccc}AB\end{array}\right] are reflecting over the (x-axis) which is the line that is (horizontal).

Your correct answer would be . . . 

\boxed{\boxed{x-axis \ would \ be \ your \ answer}}

Hope this helps you!
~Jurgen
5 0
3 years ago
Complete the following.(a) Find the greatest common factor (GCF) of 63 and 36.хGCF = 0(b) Use the GCF to factor 63 -36.63 – 36 =
morpeh [17]
Answer:

a) The GCF of 63 and 36 is 9

b)

63-36=9\times(7-4)

Explanation:

a) To find the GCF of 63 and 36, we do the following:

Write 63 and 36 as follows:

\begin{gathered} 63=3\times3\times7 \\ 36=2\times2\times3\times3 \end{gathered}

The common factors are:

3\times3

Therefore, the Greatest Common Factor (GCF) is 9

b) To find the factor 63 - 36

63-36=9\times(7-4)

6 0
1 year ago
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