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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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almond37 [142]

Answer:

You need to find the x and y intercepts so...

The x intercept is (18,0) since x=18

The y intercept is (0,12) since y=12

Step-by-step explanation:

Cover the y when you are finding the y intercept

Cover the x when you are finding the x intercept

8x/8

144/8

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12y/12

144/112

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5 0
3 years ago
Wore
zhuklara [117]
“kilo-“ means “thousand.” A kilogram is 1,000 grams.
5 kg = 5,000 g
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3 years ago
Find the area each sector. Do Not round. Part 1. NO LINKS!!<br><br>​
sladkih [1.3K]

Answer:

\textsf{Area of a sector (angle in degrees)}=\dfrac{\theta}{360 \textdegree}\pi r^2

\textsf{Area of a sector (angle in radians)}=\dfrac12r^2\theta

17)  Given:

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\textsf{Area of a sector}=\dfrac{240}{360}\pi \cdot 16^2=\dfrac{512}{3}\pi \textsf{ ft}^2

19)  Given:

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\textsf{Area of a sector}=\dfrac12\cdot14^2 \cdot \dfrac{3\pi}{2}=147 \pi \textsf{ cm}^2

21)  Given:

  • \theta=\dfrac{ \pi}{2}
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\textsf{Area of a sector}=\dfrac12\cdot10^2 \cdot \dfrac{\pi}{2}=25 \pi \textsf{ mi}^2

23)  Given:

  • \theta = 60°
  • r = 7 km

\textsf{Area of a sector}=\dfrac{60}{360}\pi \cdot 7^2=\dfrac{49}{6}\pi \textsf{ km}^2

3 0
2 years ago
There are five marbles in a bag two are yello and three are green. You draw a marble, replace it, and then draw another. What is
Sphinxa [80]

Answer: 2/5

Step-by-step explanation:

Since there are 5 marbles and 3 aren't yellow, you have a 2/5 chance to choose the other two yellow marbles

Hope this helps:)

5 0
2 years ago
The liter is the basic unit of weight in the metirc system?
Ivanshal [37]
False. The liter is the basic unit of volume in the metric system. The basic unit of weight is the kilogram.
8 0
3 years ago
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