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klasskru [66]
3 years ago
6

Lonnie plans to join the gym. He must pay a $35 membership fee. He will

Mathematics
1 answer:
SVETLANKA909090 [29]3 years ago
6 0

Answer: 5

Step-by-step explanation:

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Suppose a consumer group suspects that the proportion of households that have three cell phones NOT known to be 30%. A cell phon
leva [86]

Answer:

We conclude that the actual percentage of households is equal to 30%.

Step-by-step explanation:

We are given that a consumer group suspects that the proportion of households that have three cell phones NOT known to be 30%.

Their marketing people survey 150 households with the result that 43 of the households have three cell phones.

Let p = <u><em>proportion of households that have three cell phones NOT known.</em></u>

So, Null Hypothesis, H_0 : p = 30%      {means that the actual percentage of households is equal to 30%}

Alternate Hypothesis, H_A : p \neq 30%     {means that the actual percentage of households different from 30%}

The test statistics that would be used here <u>One-sample z-test for proportions;</u>

                                T.S. =  \frac{\hat p-p}{\sqrt{\frac{p(1-p)}{n} } }  ~ N(0,1)

where, \hat p = sample proportion of households having three cell phones = \frac{43}{150} = 0.29

           n = sample of households = 150

So, <u><em>the test statistics</em></u>  =  \frac{0.29-0.30}{\sqrt{\frac{0.30(1-0.30)}{150} } }  

                                     =  -0.27

The value of z test statistic is -0.27.

<u>Also, P-value of the test statistics is given by;</u>

              P-value = P(Z < -0.27) = 1 - P(Z \leq 0.27)

                            = 1 - 0.6064 = <u>0.3936</u>

<u>Now, at 1% significance level the z table gives critical value of -2.58 and 2.58 for two-tailed test.</u>

Since our test statistic lies within the range of critical values of z, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which <em><u>we fail to reject our null hypothesis</u></em>.

Therefore, we conclude that the actual percentage of households is equal to 30%.

4 0
3 years ago
What is c? Please answer this
Black_prince [1.1K]

Answer:

C is a letter on the alphabet

Step-by-step explanation:

you havent included any pictures so i dont know what you mean

6 0
3 years ago
Read 2 more answers
1/8y as an algebraic expression
rewona [7]
Y/8 simplified maybe
8 0
3 years ago
Grrrr i have no idea what this unit is talking about please help
Kipish [7]

Answer:

SSS Triangle Congruence.

8 0
3 years ago
A cylinder has a radius of 12 m and a height of 9 m.
mrs_skeptik [129]
The volume of cylinder formula is πr²h.

V = π(12)²(9)
V = 1296π³

So the correct answer is 1296π³
3 0
3 years ago
Read 2 more answers
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