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3 years ago

What does a regulatory buoy with a diamond symbol indicate?

Mathematics

1 answer:

mina [271]3 years ago

7 0

A regulatory buoy with a diamond symbol indicates danger from rock, shoal, wreck etc. Hope this helps!

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3 years ago

What is y= -5/4x+6 on a graph<br>I tried mathaway but it's not helping

IgorLugansk [536]

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6.oz and all other things are going on

Step-by-step explanation:

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3 years ago

What’s the slope for 2,1 and 4,5

kozerog [31]

Answer:

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Step-by-step explanation:

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3 years ago

When you flip a biased coin the probability of getting a tail is 0.4. How many times would you expect to get tails if you flip t

olya-2409 [2.1K]

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Step-by-step explanation:

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2 years ago

Consider a left-tailed test, where the p-value is found to be 0.10. If the sample size n for this test is 49, then the t statist

tigry1 [53]

Answer:

$df=n-1=49-1=48$

We know that the p value is 0.1, and since is a left tailed test would be given by:

$p_v = P(t_{48} < t_{calculated})=0.1$

And we can find the calculated value using excel or the t table.

If we use the following excel code we got: "=T.INV(0.1,48)"

And the calculated value is $t_{calculated}=-1.29944$

Step-by-step explanation:

State the null and alternative hypotheses to be tested

We need to conduct a hypothesis in order to determine if the true mean is lower than specified valu $\mu_o$ , the system of hypothesis would be:

Null hypothesis: $\mu \geq \mu_o$

Alternative hypothesis: $\mu < \mu_o$

Compute the test statistic

We don't know the population deviation, so for this case is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

We can find the degrees of freedom for this test given by:

$df=n-1=49-1=48$

We know that the p value is 0.1, and since is a left tailed test would be given by:

$p_v = P(t_{48} < t_{calculated})=0.1$

And we can find the calculated value using excel or the t table.

If we use the following excel code we got: "=T.INV(0.1,48)"

And the calculated value is $t_{calculated}=-1.29944$

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2 years ago