Which purchase may people be required to save a small amount of money invested regularly that grows over time?

An automobile manufacturer has given its van a 31.3 miles/gallon (MPG) rating. An independent testing firm has been contracted t

Fynjy0 [20]

Answer:

$z=\frac{31.1-31.3}{\frac{1.3}{\sqrt{140}}}=-1.82$

The p value for this case would be given by:

$p_v =2*P(z$

For this case since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true mean is not significantly different from 31.3 MPG

Step-by-step explanation:

Information given

$\bar X=31.1$ represent the sample mean

$\sigma=1.3$ represent the population standard deviation

$n=140$ sample size

$\mu_o =31.3$ represent the value that we want to test

$\alpha=0.02$ represent the significance level for the hypothesis test.

z would represent the statistic

$p_v$ represent the p value

Hypothesis to test

We want to test if the true mean is equal to 31.3 MPG, the system of hypothesis would be:

Null hypothesis: $\mu =31.3$

Alternative hypothesis: $\mu \neq 31.3$

Since we know the population deviation, the statistic is given by

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

Replacing we got:

$z=\frac{31.1-31.3}{\frac{1.3}{\sqrt{140}}}=-1.82$

The p value for this case would be given by:

$p_v =2*P(z$

For this case since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true mean is not significantly different from 31.3 MPG

4 0

3 years ago

Corey spent 25% of his savings on a printer at Louie’s Electronics.

KengaRu [80]

Let c represent the original amount that this guy had saved up.

He spent 25% of this amount, or 0.25c, on the printer.

To progress further, we have to know how much the printer cost.

Supposing that the printer cost $100 (which we do not know as a fact), this would be equal to 0.25c.

Thus, his savings originally amounted to c = $100/0.25 = $400.

7 0

2 years ago

The running time (in minutes) of a TV episode is 60-2c where c is the number of commericals aired during the episode. What is th

slava [35]

Answer:

60-2(15)=?

60-30=30

30 minutes

5 0

2 years ago

Answer the following question below.

kotykmax [81]

If I’m right I think the answer is 1,759.32

3 0

2 years ago

One half of the sum of 7 and F minus the product of 6 and Q?

ankoles [38]

This is how you would write the statement:
$\frac{1}{2}(7+F)-(6*Q)$

You could also write it like this, if the one-half applies to everything:
$\frac{1}{2} ((7+F)-(6*Q))$

8 0

3 years ago