Make x the subject of the formula: <br> Y=3x^2+4

Help please will give brainly!! What do you notice about the relationship between ice cream sales and temperature? “As the tempe

Stella [2.4K]

Answer:

As the temperature increases, the ice cream sales increase.

8 0

4 years ago

Adison earned $25 mowing her neighbor's lawn. Then she loaned her friend $13 and got $50 from her grandma for her birthday. She

andreev551 [17]

She started off with 24

8 0

3 years ago

A paper reported that in a representative sample of 282 American teens age 16 to 17, there were 71 who indicated that they had s

elena-s [515]

Answer:

$z=\frac{0.252 -0.25}{\sqrt{\frac{0.25(1-0.25)}{282}}}=0.0776$

$p_v =P(z>0.0776)=0.4691$

Since the p value is higher than the significance level so then we can conclude that we have enough evidence to FAIL to reject the null hypothesis and there is no evidence in order to say that the true proportion of teens more than a quarter of Americans age 16 to 17 have sent a text message while driving is higher than 0.25

Step-by-step explanation:

Information provided

n=282 represent the sample selected

X=71 represent the teens indicated that they had sent a text message while driving

$\hat p=\frac{71}{282}=0.252$ estimated proportion of teens indicated that they had sent a text message while driving

$p_o=0.25$ is the value that we want to test

$\alpha=0.01$ represent the significance level

z would represent the statistic

$p_v$ represent the p value

System of hypothesis

We want to check if more than a quarter of Americans age 16 to 17 have sent a text message while driving, and the hypothesis are:

Null hypothesis: $p\leq 0.7$

Alternative hypothesis: $p > 0.25$

The statistic is given by:

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

Replacing we got:

$z=\frac{0.252 -0.25}{\sqrt{\frac{0.25(1-0.25)}{282}}}=0.0776$

Decision

The p value for this case is:

$p_v =P(z>0.0776)=0.4691$

Since the p value is higher than the significance level so then we can conclude that we have enough evidence to FAIL to reject the null hypothesis and there is no evidence in order to say that the true proportion of teens more than a quarter of Americans age 16 to 17 have sent a text message while driving is higher than 0.25

8 0

4 years ago

Discuss four ways to keep the nervous system healthy

geniusboy [140]

Exercise regularly.

Do not smoke or use tobacco products.

Get plenty of rest.

Eat a balanced diet.

7 0

3 years ago

Read 2 more answers

At the recent Cycle for Survival event, you received the following pledge amounts for your participation: $1, $8, $12, $10, $45,

xxMikexx [17]

Answer:

Mean: $11

Median: $8

Mode: $1

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Make x the subject of the formula: Y=3x^2+4