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yawa3891 [41]
3 years ago
7

In a random sample of high school seniors, the proportion who use text messaging was 0.88. In a random sample of high school fre

shmen, this proportion was 0.68. Researchers found the difference in proportions to be statistically significant and obtained one of the following numbers for the p-value. Which is it?
a. 1.5
b. 0.02
c. 0.78
d. 0.30
Mathematics
1 answer:
Bond [772]3 years ago
5 0

Answer:

b. 0.02

Step-by-step explanation:

The smaller the p-value, the stronger the evidence that you should reject the null hypothesis. In this case, this will mean rejecting that the proportions are not significantly different.

Usually, a p-value is considered to be statistically significant when p ≤ 0.05.

From the answer options provided, alternative b. 0.02 is the only one that represents the difference in proportions to be statistically significant (there is only a 2% chance that the proportions are not significantly different).

Therefore, the answer is b. 0.02

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The number 1,645.6 expressed in scientific notation equals
grin007 [14]

Answer:

1.6456 * 10^{3}

Step-by-step explanation:

<u>Step 1:  Convert to Scientific Notation</u>

<u />1645.6 is in standard notation

1.6456 * 10^{3} is in scientific notation

Answer:  1.6456 * 10^{3}

8 0
3 years ago
Find the ratio of a to b if 2a=3c and 12c=7b​
postnew [5]

Answer:

I think the answer is 1a : 14b

6 0
2 years ago
CAN SOMEONE PLEASE HELP ME???
Klio2033 [76]

Answer:

B

Step-by-step explanation:

y=x+2. let it eq 1

put y= - 2 and x=-4 in eq 1

-2 = -4+2

-2= -2

now put x= -3 and y= -1 in eq 1

-1 = -3+2

-1 =-1

now put x= -2 and y=0 in eq 1

0 = -2+2

0=0

now put x= -1 and y=1 in eq 1

1 = -1+2

1=1

5 0
3 years ago
Need help step by step​
shusha [124]
Y = mx + b

8x - 4y - 9 = 0

first you move the nine to the other side of the equal sign (add nine to both sides)

8x - 4y = 9

then you need to also move your 8x over to the other side as well (remember we are trying to get y by itself!)

- 4y = -8x + 9

then we are going to divide -4 to both sides

and you get

y = 2x - 9/4

we can then identify the slope as 2

so B. 2 would be your answer

hope this helped
3 0
2 years ago
A cookie company sells a box of cookies that weighs 24 ounces. The company states that the acceptable percent error in filling t
Rama09 [41]

Answer:

The answer is CH8

Step-by-step explanation:

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3 years ago
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