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muminat
3 years ago
10

Mean and standard deviation of sample proportions

Mathematics
1 answer:
asambeis [7]3 years ago
8 0

Answer: D

Suppose that 35\%35%35, percent of students in a school can sing their national anthem correctly. The music teacher takes an SRS of 303030 students from the population of 750750750 students at the school and finds that 40\%40%40, percent of students sampled can sing their national anthem correctly. The teacher plans to take more samples like this.

Step-by-step explanation: Khan Academy Explanation

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April had 3 7 of a pound of pecans. her sister ate 2 3 of april's pecans. how many pounds of pecans did april's sister eat?
RideAnS [48]
 <span>April had </span><span>3/7</span><span> of a pound of pecans. Her sister ate </span><span>2/3</span><span> of April's pecans. How many pounds of pecans did April's sister eat?

Answer:2/7

Explaining </span><span>3/7</span><span> x </span><span>2/3</span><span> = </span><span>621</span><span> = </span><span>2/7
                                                             Good Luck! :)



</span>
7 0
3 years ago
Read 2 more answers
Help me please I don’t know what to do my guy
anastassius [24]
I am guessing the answer is C.

since X seem to be a full 90-degree angle, and y is also 45 degrees.
5 0
3 years ago
Mai's younger brother tells her that 10/7 equal to 2‾√ 2 2‾√ 2 . Mai knows this can't be right, because 10/7 is rational and 2‾√
makvit [3.9K]

Answer:

The number 10/7 is a rational number, which means it can be expressed as a fraction. Also, if we divide it would give a decimal infinite periodical number, which means it has a pattern on its decimal numbers.

On the other hand, the square root of 2 is irrational number, that means it can't be expressed as a fraction, because its decimal numbers don't have any pattern at all.

So, Mai's brother can see these type of numbers as crazy (irrational numbers) and sane (rational numbers).

At last, another important characteristic to shows that they aren't equal is that they don't have the exactly decimal numbers.

6 0
3 years ago
This is geometry. Please help. Will mark brainliest.
nevsk [136]

Answer:Not Here

Step-by-step explanation:.dd

7 0
3 years ago
8.7x – 1.9x = 116.96<br> Help please
jok3333 [9.3K]

Answer: x = 17.2

Step-by-step explanation:

So we can combine 8.7x and 1.9x as they are considered like terms.

So basically since they have the same base of x we can disregard the x when subtracting.

So its more like 8.7-1.9 which = 6.8

Now add the x back

So it is 6.8x = 116.96

Now we need to isolate the variable.

To do this we need to divide the 6.8 on both sides.

So x = 116.96/6.8

x = 17.2

3 0
2 years ago
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