Nobody answered me all day and I really need help can someone answer this?

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

Please help answer this question idk if im right or not

BlackZzzverrR [31]

Yes if my math is correct you should be right.

4 0

3 years ago

A car is traveling at a rate of 15 meters per second. What is the car's rate in kilometers per hour? How many kilometers will th

MrMuchimi

Answer:

54 km per hr

270 km

Step-by-step explanation:

1 metre per second is 3.6 km per hour.

15*3.6=54 km per hour

distance covered in 5 hrs=54*5=270 km

4 0

3 years ago

Stuckkk need a answer

SOVA2 [1]

Your answer would be D

The work: 0.77 times 6
and 2.95 times 2

those equal $4.62 and $5.9
add those two together, and you'll have $10.52

7 0

3 years ago

A basket ball player made 23 out of 50 free throws in the last game. What percent of the free throws did he make?

AlexFokin [52]

23/50 times 100= 46%

4 0

3 years ago