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Allisa [31]
3 years ago
15

A new CD is being marketed to teens at a price of $20. The suppliers are selling all of the CDs they have, and the teens are get

ting all of the CDs they are demanding, so $20 could be defined as the CD's. a. average price b. equilibrium price c. maximum price d. minimum price
Mathematics
2 answers:
DENIUS [597]3 years ago
6 0
Out of the choices given, $20 can be defined as the CD's equilibrium price. The correct answer is B, equilibrium price. 
Brums [2.3K]3 years ago
4 0
I believe the answer is B. equilibrium price
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) The National Highway Traffic Safety Administration collects data on seat-belt use and publishes results in the document Occupa
asambeis [7]

Answer:

We conclude that there is a difference in seat belt use.

Step-by-step explanation:

We are given that of 1,000 drivers 16-24 years old, 79% said they buckle up, whereas 924 of 1,100 drivers 25-69 years old said they did.

<u><em>Let </em></u>p_1<u><em> = population proportion of drivers 16-24 years old who buckle up .</em></u>

<u><em /></u>p_2<u><em> = population proportion of drivers 25-69 years old who buckle up .</em></u>

So, Null Hypothesis, H_0 : p_1-p_2 = 0      {means that there is no significant difference in seat belt use}

Alternate Hypothesis, H_A : p_1-p_2\neq 0      {means that there is a difference in seat belt use}

The test statistics that would be used here <u>Two-sample z proportion statistics;</u>

                     T.S. =  \frac{(\hat p_1-\hat p_2)-(p_1-p_2)}{\sqrt{\frac{\hat p_1(1-\hat p_1)}{n_1}+\frac{\hat p_2(1-\hat p_2)}{n_2} } }  ~ N(0,1)

where, \hat p_1 = sample proportion of drivers 16-24 years old who buckle up = 79%

\hat p_2 = sample proportion of drivers 25-69 years old who buckle up = \frac{924}{1100} = 84%

n_1 = sample of 16-24 years old drivers = 1000

n_2 = sample of 25-69 years old drivers = 1100

So, <u><em>test statistics</em></u>  =  \frac{(0.79-0.84)-(0)}{\sqrt{\frac{0.79(1-0.79)}{1000}+\frac{0.84(1-0.84)}{1100} } }  

                              =  -2.946

The value of z test statistics is -2.946.

Since, in the question we are not given with the level of significance so we assume it to be 5%. <u><em>Now, at 0.05 significance level the z table gives critical values of -1.96 and 1.96 for two-tailed test.</em></u><em> </em>

<em>Since our test statistics doesn't lie within the range of critical values of z, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which </em><em><u>we reject our null hypothesis</u></em><em>.</em>

Therefore, we conclude that there is a difference in seat belt use.

4 0
3 years ago
50% of trick or treaters dressed up as a ghosts.
cricket20 [7]

Answer:

66

Step-by-step explanation:

50% = 1/2

33 x 2 = 66

4 0
3 years ago
Faye is 5 ft 5 in. Faye is 10 in. Shorter than her older brother. How tall is Faye’s older brother?
victus00 [196]

Answer:

He's 6 ft "5"

Step-by-step explanation:

Added 10

5 0
2 years ago
Read 2 more answers
Round the number to the thousandths place.<br><br> 47,268.568593
Tatiana [17]
47268.569 ttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt
7 0
3 years ago
Complete the following equation using &lt;,&gt;, or = 7___24/4
olga2289 [7]

Answer:

<

Step-by-step explanation:

Have a Great Day!!!

8 0
3 years ago
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