A race car driver won a 900 mile race with a speed of 178.9 miles per hour. find the driver's time.

Guyssss hurrry pleaseeeeeeeeeee im on my knees

hodyreva [135]

Answer:

$40.35

cause.... 40.352 is about 40.35

4 0

3 years ago

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Over the past several years, the proportion of one-person households has been increasing. The Census Bureau would like to test t

bixtya [17]

Answer:

For this case we can find the critical value with the significance level $\alpha=0.05$ and if we find in the right tail of the z distribution we got:

$z_{\alpha}= 1.64$

The statistic is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

Replacing we got:

$z=\frac{0.344 -0.27}{\sqrt{\frac{0.27(1-0.27)}{125}}}=1.86$

Since the calculated value is higher than the critical value we have enough evidence to reject the null hypothesis and we can conclude that the true proportion of households with one person is significantly higher than 0.27

Step-by-step explanation:

We have the following dataset given:

$X= 43$ represent the households consisted of one person

$n= 125$ represent the sample size

$\hat p= \frac{43}{125}= 0.344$ estimated proportion of households consisted of one person

We want to test the following hypothesis:

Null hypothesis: $p \leq 0.27$

Alternative hypothesis: $p>0.27$

And for this case we can find the critical value with the significance level $\alpha=0.05$ and if we find in the right tail of the z distribution we got:

$z_{\alpha}= 1.64$

The statistic is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

Replacing we got:

$z=\frac{0.344 -0.27}{\sqrt{\frac{0.27(1-0.27)}{125}}}=1.86$

Since the calculated value is higher than the critical value we have enough evidence to reject the null hypothesis and we can conclude that the true proportion of households with one person is significantly higher than 0.27

5 0

3 years ago

....................

frosja888 [35]

Well its pretty obvious that it cant be A the answer will be E) because abc are connected and abd are as well so the answer will be e

3 0

3 years ago

20x4 = blink so with u do is your put 20 group then u have add 4 to it

DENIUS [597]

Answer:

Thank you

Step-by-step explanation:

8 0

3 years ago

Izzy's heartbeat rate was measured on an EKG machine. After conversion, the function produced could be modeled by a sine functio

Amanda [17]

First, we calculate the amplitude
A = (1/2) (xmax - xmin)
A = (1/2) (8 - (-2)) = 5

Since we're given with the period which is pi, then the coefficient of x is just 1. So, the model is
y = 5 sin x

8 0

4 years ago

Read 2 more answers

A race car driver won a 900 mile race with a speed of 178.9 miles per hour. find the​ driver's time.

A race car driver won a 900 mile race with a speed of 178.9 miles per hour. find the driver's time.