Answer:
The confidence interval for the difference in proportions is
No. As the 95% CI include both negative and positive values, no proportion is significantly different from the other to conclude there is a difference between them.
Step-by-step explanation:
We have to construct a confidence interval for the difference of proportions.
The difference in the sample proportions is:
The estimated standard error is:
The z-value for a 95% confidence interval is z=1.96.
Then, the lower and upper bounds are:
The confidence interval for the difference in proportions is
<em>Can it be concluded that there is a difference in the proportion of drivers who wear a seat belt at all times based on age group?</em>
No. It can not be concluded that there is a difference in the proportion of drivers who wear a seat belt at all times based on age group, as the confidence interval include both positive and negative values.
This means that we are not confident that the actual difference of proportions is positive or negative. No proportion is significantly different from the other to conclude there is a difference.
It is B. (-1, 3) and (-3, 13)
Answer:
1.x=9 Nd 2.x=3/4....... .........
Answer:
C
Step-by-step explanation:
because if you input 18.25 into the equation and solve you get and non-whole number of 2.608.
It is impossible to have 2.608 toppings on your pizza, <u>it has to be a whole number.</u>
All the other answers had whole numbers besides C, therefore C is wrong.
Its just a simple equation made to look harder.
Since he started at 6 feet under, it would be -6, and the he goes up 14, so its
-6+14 =8 Now hes at 8 feet above ground.
Then he goes down 11 again so it would be 8 - 11 = -3
So at the end, he would be 3 feet below ground level.