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Marina CMI [18]
3 years ago
13

I also need help with this one can y’all put the step by step explanation please?

Mathematics
1 answer:
larisa86 [58]3 years ago
8 0

Answer:

66

Step-by-step explanation:

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A recent study by Ohio State University reported at Science Daily suggests that students with cell phones may take more risks th
777dan777 [17]

Answer:

The value of the test statistic z for this hypothesis test is -2.79

Step-by-step explanation:

Consider the provided information.

To calculate the test statistic use the formula:

z=\frac{\hat p-p_0}{\sqrt{\frac{p_0(1-p_0)}{n}}}

Where, z  is Test statistics, n is Sample size, p₀ = Null hypothesized value  and \hat p = Observed proportion.

p₀ = 0.50

Thus 1-p₀= 0.50

42% responded that if they had a cell phone, thus \hat p=0.42

The sample size is 305.

Substitute the respective values in the above formula.

z=\frac{0.42-0.50}{\sqrt{\frac{0.50(0.50)}{305}}}

z=\frac{-0.08}{\sqrt{0.00082}}

z=-2.79

Hence, the value of the test statistic z for this hypothesis test is -2.79

4 0
3 years ago
After stepping into a room with unusual lighting, Michelle's pupil has a diameter of 8 millimeters. What is the pupil's circumfe
RideAnS [48]
2 x Pi x Radius I think?
8 0
4 years ago
Someone help me ASAP 10 points each
tia_tia [17]

Answer:

a

Step-by-step explanation:

4 0
3 years ago
Question 2 of 10
azamat

Answer:

C

Step-by-step explanation:

THe equation given is

2x+2y=16

y=x-4

We put 2nd equation in first equation and first solve for x:

2x+2y=16\\2x+2(x-4)=16\\2x+2x-8=16\\4x=16+8\\4x=24\\x=\frac{24}{4}\\x=6

Now, since we know y = x - 4, we substitute x = 6 and get y:

y = x - 4

y = 6 - 4

y =2

The correct ordered pair is (6,2), answer choice C

6 0
3 years ago
you deposit $1,200 in a bank account. Find the balance after 4 years in the account pays 3.5% annual interest compounded monthly
photoshop1234 [79]

Answer:

The balance after 4 years would be $1,380.05.

Step-by-step explanation:

Given that you deposit $ 1,200 in a bank account, to find the balance after 4 years in the account pays 3.5% annual interest compounded monthly, the following calculation must be performed:

1,200 x (1 + 0.035 / 12) ^ 4x12 = X

1,200 x 1.00291666 ^ 48 = X

1,380.05 = X

Therefore, the balance after 4 years would be $1,380.05.

7 0
3 years ago
Read 2 more answers
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