What is 0.5 + -1 1/2

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 $t_{calculated}=-1.29944$

3 0

3 years ago

A local salesman receives a base salary of $975 monthly. He also receives a commission of 7% on all sales over $1250. How much w

slava [35]

Answer:

$17,321.43

Step-by-step explanation:

The amount of monthly income from commissions would have to be ...

$2100 -975 = $1125

This is 7% of sales over $1250, so the sales (s) would need to be ...

1125 = 0.07(s -1250)

1125 = .07s -87.50 . . eliminate parentheses

1212.50 = 0.07s . . . . add 87.50

17,321.43 = s . . . . . . . divide by 0.07

He would have to sell $17,321.43 in a month if he needed an income of $2100.

8 0

3 years ago

Find the slope of the line passing through the point (-3, 6) and the origin.<br> M=

Nuetrik [128]

You know b=0 because it is passing through the orgin (0,0) and b is the y intercept. You input (-3,6) as (x,y)

7 0

3 years ago

Does 8, 10, 6 form a right triangle

loris [4]

Answer:

no

Step-by-step explanation:

8, 10, 6

10 - 8 = 2

2 + 6 = 8

8 0

3 years ago

What is the value of a missing angle

iris [78.8K]

Answer:

63°

Step-by-step explanation:

First, by looking at the angle we see that the overall angle is a right angle. This means that the total will add up to 90°.

Knowing this we can then subtract

90° - 27° = 63°

6 0

2 years ago

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