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ollegr [7]
3 years ago
13

in spring 2017, data was collected from a random selection of sta 2023 students. one of the question how many concerts they had

attended in the past six months. for the 39 randomly selected upperclassmen, the sample mean was 2.31 and sample standard deviation was 2.32. for the 35 randomly selected underclassmen, the sample mean was 2.29 and the sample standard deviation was 2.64. what is the point estimate of the difference in the population mean difference in number of concerts attended between underclassmen and upperclassmen?
Mathematics
1 answer:
Over [174]3 years ago
4 0

Answer:

Step-by-step explanation:

5

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Step-by-step explanation:


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The value of Tonya's car is $21,000. The car's value depreciates at a rate of 15% per year.
MariettaO [177]

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Answer:

  (c)  f(t)=21,000(0.85)^t

Step-by-step explanation:

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  f(t)=21,000(0.85)^t

5 0
3 years ago
Simplify: -|-15|<br><br> please answer correctly i'll give brainliest and 5-star rating.
12345 [234]

Answer:

-15

Step-by-step explanation:

<u>Definition of absolute value: </u>

<em>Distance from zero on a number line. </em>

<em />

Imagine a number line with 0 in the middle of it. Now mark the number 3 on it. Also mark the <em>opposite </em>of 3, which is -3. What is the <u>distance</u> from zero to those 2 points? it's 3.

This is exactly like saying |3| = 3 and |-3| = 3

Even if the number inside absolute value is negative, it <em><u>simplifies</u></em> to the positive of the same number.

_______________________________

So let's talk about your problem.

-|-15|

> the absolute value simplifies to 15

-|-15| = - 15

So that ends up being your answer.

-15

Hope this helps!!!!!!!

7 0
3 years ago
O panglica a fost taiata, prin 5 taieturi , in bucati cu lungimea de 35 cm . Cati metri masura panglica?
Amiraneli [1.4K]
35×5=175 (metri măsoară pamblica)

3 0
4 years ago
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