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grin007 [14]
3 years ago
13

A university president believes that over the past few years, the mean age of students attending his university has decreased. T

o test this hypothesis, a study is conducted in which the age of 150 students who have been randomly sampled from the student body is measured. The mean age is 21.5 years. A complete census taken at the university a few years prior to the study showed a mean age of 23.5 years, with a standard deviation of 8.5. Test using a 1% level of significance.
What is the null hypothesis?
Mathematics
1 answer:
frozen [14]3 years ago
3 0

Answer:

quisiera ayudarte pero no hablo inglés:(

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How do I write the sum of two numbers as the product of their GCF and another sum
Delicious77 [7]
Let's assume we were given 2 numbers: 15 and 30. Their sum is:
15+30 = 45
We want to express it as the product of GCF and another sum.
15 is divisible by: 1, 3, 5, 15
30 is divisible by: 1, 2, 3, 5, 6, 10, 15, 30
The greatest number that appears in 2 series is 15.
\frac{15}{15} = 1
\frac{30}{15} = 2
In this case sum of two numbers can always be written as:
15+30 = (15\cdot 1) + (15\cdot 2) = 15\cdot (1+2) = 15\cdot 3 = 45

8 0
3 years ago
Read 2 more answers
If the area of the rectangle below is 36 square yards, what is the length of the missing side? Don’t forget to include the unit
Vitek1552 [10]

Answer: wheres the picture

Step-by-step explanation:

5 0
3 years ago
Solve for the values of x in the equation: <br> 2^(x) = 4x.
Eva8 [605]

There are two of them. 

I don't know a mechanical way to 'solve' for them.

One can be found by trial and error:

x=0 . . . . . 2^0 = 1 . . . . . 4(0) = 0 . . . . . no, that doesn't work
x=1 . . . . . 2^1 = 2 . . . . . 4(1) = 4 . . . . . no, that doesn't work
x=2 . . . . . 2^2 = 4 . . . . . 4(2) = 8 . . . . . no, that doesn't work
x=3 . . . . . 2^3 = 8 . . . . . 4(3) = 12 . . . . no, that doesn't work
<em>x=4</em> . . . . . 2^4 = <em><u>16</u></em> . . . . 4(4) = <em><u>16</u></em> . . . . Yes !  That works !       yay !

For the other one, I constructed tables of values for 2^x and (4x)
in a spread sheet, then graphed them, and looked for the point
where the graphs of the two expressions cross.

The point is near, but not exactly,         <em>x = 0.30990693...

</em>
If there's a way to find an analytical expression for the value, it must involve
some esoteric kind of math operations that I didn't learn in high school or
engineering school, and which has thus far eluded me during my lengthy
residency in the college of hard knocks.<em> </em> If anybody out there has it, I'm
waiting with all ears.<em>

</em>
7 0
3 years ago
Read 2 more answers
The total length of wire needed to fasten 175 bundles is 2,975 cm.
UkoKoshka [18]

According to the conversion table we know,

1 meter = 100cm

This means if we need to convert meters to centimeters, we need to multiply by 100

Or

If we need to convert from centimeters to meters, we need to divide by 100.

Here the length of the wire needed to wrap 175 bundles = 2975 cm.

Now as we need to convert it to meters.

We need to divide this by 100.

We get

2975/100= 29.75

So 2975 cm = 29.75 m

Option D) is the right answer

3 0
3 years ago
Read 2 more answers
4.8 x 10 to the 8th power divided by 1.2 x 10 to the 4th power times 2.2 x 10 to the negative 8th power
Masteriza [31]
(4.8*10^8)/(1.2*10^4)2.2*10^-8=11/<span>12500</span>
I hope this helps
6 0
4 years ago
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