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Sliva [168]
2 years ago
9

Claim: Fewer than 92% of adults have a cell phone. In a reputable poll of 1207 adults, 85% said that they have a cell phone. Fin

d the value of the test statistic,
Round to two decimal places as needed
Mathematics
1 answer:
lina2011 [118]2 years ago
6 0

Answer:

- 6.547

Step-by-step explanation:

Given that:

Sample size (n) = 1207

p = 0.85

p0 = 0.92

The test statistic :

Z = (p - p0) / √(p0(1 - p0) / n)

Z = (0.85 - 0.92) / √(0.92(1 - 0.85) / 1207)

Z = - 0.07 / √(0.92(0.15) / 1207)

Z = - 0.07 / √0.0001143

Z = - 0.07 / 0.0106926

Z = - 6.5465446

Z = - 6.547

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The high school choirs participating in a fundraising sales contest. The choir will receive a bonus if they make 20 sales in the
Vinil7 [7]

Answer:

A total of 53 sales to qualify for bonus

Step-by-step explanation:

In the first week, they required a sale of 20 tickets to recieve a bonus.

In subsequent weeks, they require a sale of (n + 3)

Where n = number of sale the previous week

Week 2, they'll require n + 3 = (20 + 3) sales = 23 sales

Week 3 = 23 + 3 = 26 sales

Week 4 = 26 + 3 = 29 sales

Week 5 = 29 + 3 = 32 sales

Week 6 = 32 + 3 = 35 sales

Week 7 = 35 + 3 = 38 sales

Week 8 = 38 + 3 = 41 sales

Week 9 = 41 + 3 = 44 sales

Week 10 = 44 + 3 = 47 sales

Week 11 = 47 + 3 = 50 sales

Week 12 = 50 + 3 = 53 sales

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3 years ago
Does anyone know what the simplest form is? Will give brainiest
Ahat [919]

Hello from MrBillDoesMath!

Answer:

Choice B.

Discussion:

From the first step

324 x^6 y^ 8 =  

2^2 * 3^4 * x^2 * x^4* y^8

so the fourth root of this is

2 ^(2/4)*  3^(4/4) x^(2/4)* x^(4/4)*y^(8/4) =

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(2x)^(1/2) * 3 * x * y^2 =

3 * x * y^2 * sqrt(2x) =

3 * x * y^2 * ( (2x)^2) ^ (1/4)) =

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which is choice B

Thank you,

MrB

6 0
3 years ago
Read 2 more answers
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Alekssandra [29.7K]

Answer:

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Step-by-step explanation:

20x=9y

9/20 to 5/9

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9/20 of the conkers collected are from Hannah

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Hannah collected more acorns

8 0
2 years ago
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Anarel [89]

Answer:

Answer is 30.25

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5 0
2 years ago
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At the start of a tennis match Ivan had 28/32 quart of water in his water bottle. He drank water from the bottle during the matc
const2013 [10]

Answer:

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Step-by-step explanation:

That would be 28/32 - 1/4

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= 20/32  

= 5/8 of a quart.

5 0
3 years ago
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