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3 years ago

Please help!!!! I need help with this question

Mathematics

1 answer:

aleksandr82 [10.1K]3 years ago

6 0

Answer:

Step-by-step explanation:

hope this helps with the work

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A researcher believes that 12% of a simple random sample of adults will be able to identify a Toyota Scion by brand and model na

DochEvi [55]

Answer: 650

Step-by-step explanation:

When prior estimate of population proportion is known , then the formula to find the required sample size is given by :-

$n=p(1-p)(\dfrac{z^*}{E})^2$

, where p= population proportion

E= margin of error

z* = Critical value.

Let p be the proportion of adults able to identify a Toyota Scion by brand and model name.

As per given , we have

p = 12%= 0.12

E= 2.5%=0.025

Critical value for 95% confidence interval : z* = 1.960 [By z-table ]

Then, the required sample size = $n=(0.12)(1-(0.12))(\dfrac{1.96}{0.025})^2$

$n=(0.1056)(78.4)^2$

$n=(0.1056)(6146.56)$

$n=649.076736\approx650$

Thus , the required sample size = 650

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3 years ago

For 20 POINTS!! A train goes from Springfield, MA to Boston at a speed of 40 mph. On the return journey it moves at a speed of 8

DaniilM [7]

Answer:

Magbilang kayo

Step-by-step explanation:

Magbilang kayo

8 0

3 years ago

Read 2 more answers

Question 1: Benjamin is pricing two different

KiRa [710]

Answer: 3 (c)

Step-by-step explanation:

2 * 3 = 6 therefore 15 * 3 = 45$

3 * 2 = 6 therefore 21 * 2 = 42$

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2 years ago

Convert the following equation into slope intercept form. 3x + 21y = 21 Stars

RideAnS [48]

Answer:

y = -(1/7)x + 1

Step-by-step explanation:

$3x + 21y = 21 \\ 21y = 21 - 3x \\ y = \frac{21 - 3x}{21} \\ y = 1 - \frac{1}{7} x \\ y = - \frac{1}{7} x + 1$

6 0

3 years ago

I put more points, sorry

Murljashka [212]

Answer:

I dont understand. It isnt clear on what they want you to do.

3 0

3 years ago