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maxonik [38]
3 years ago
9

What am I doing with my life?

Mathematics
2 answers:
dolphi86 [110]3 years ago
6 0
Lollllllllllllllllllll
mihalych1998 [28]3 years ago
4 0
Lol hey what do you wanna do whatever you wanna do just follow your dreams and I’m bored to
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The level of dissolved oxygen (DO) in a stream or river is an important indicator of the water's ability to support aquatic life
kaheart [24]

Answer:

a) It is most appropiate to apply t procedures with this sample because the population standard deviation is unknown. We have to estimate it from the sample standard deviation.

b) There is no enough evidence to claim that disolved oxygen level is below 5 mg/l.

c) As the null hypothesis was not rejected, the only error we could have made is a Type II error.

This Type II error is made when fail to reject the null hypotesis even when the alternative hypothesis is true.

In this context, it would mean that the aquatic life is really at risk (dissolved oxygen levels below 5 mg/l), but because the sample results combined with its size were not giving enough evidence to prove the claim.

Step-by-step explanation:

b) We have to perform a hypothesis test on the mean, at a significance level of 0.05.

The null and alternative hypothesis are:

H_0:\mu\geq 5\\\\H_a: \mu

The sample mean is 4.77 and the sample standard deviation is 0.94.

The sample size is 15, so the degrees of freedom are:

df=n-1=15-1=14

The t-statistic is:

t=\frac{\bar x-\mu}{s/\sqrt{n}} =\frac{4.77-5}{0.94/\sqrt{15}}= \frac{-0.23}{0.242}=-0.95

For a t=0.95 and df=14, the P-value is P=0.18.

This P-value is bigger than the significance level, so the null hypothesis is failed to be rejected.

There is no enough evidence to claim that disolved oxygen level is below 5 mg/l.

6 0
3 years ago
Square root 8( square root 2+2)
Deffense [45]
Square root 8 plus 2
6 0
3 years ago
How many 1/9make up2/6
Naily [24]
To find this we can do 2/6 divided by 1/9.

the answer will be 3.
4 0
3 years ago
Which statement is true regarding the graphed functions?​
harina [27]
<h3>Answer: Choice A.  f(0) = g(0)</h3>

This is because the red and blue lines cross at (0,-2). We don't really need to worry about the y coordinate here. For this problem, all we care about is the x coordinate, which is x = 0.

When x = 0, the outputs of each function f(x) and g(x) are both the same value. So that's why we can say f(0) = g(0). It's the same as saying f(x) = g(x) has the solution x = 0.

6 0
3 years ago
Write down all the possibilities when rolling a fair six sided die
Sergio [31]

Answer:

1,2,3,4,5,6

Step-by-step explanation:

You can roll a 1,2,3,4,5 or 6 on the dice

Hope it helps!

please mark brainliest

6 0
3 years ago
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