Answer:
b. More than half of all people prefer texting.
Step-by-step explanation:
According to the survey 56% of the respondents prefer texting over making call. This means the value of sample proportion p is:
Sample proportion = p = 56% = 0.56
The margin of error with 95% confidence interval is 3 percent points i.e.
Margin of error = M.E = 0.03
The true value of the population proportion can be expressed as the following confidence interval:
From p - M.E to p + M.E
Lower Limit = p - M.E = 0.56 - 0.03 = 0.53 = 53%
Upper Limit = p + M.E = 0.56 + 0.03 = 0.59 = 59%
From here we can see that the lower and upper limit of confidence interval are above 50%. Based on these calculations the following claim can be supported:
b. More than half of all people prefer texting.
-6/7p+1/7 um Idk what you wanted me to do but I added -4/7p with -2/7p
The question is missing some important details required to answer the question. I found a similar question, so I will answer using this details. If there is any differences in the details, you can still use my working by changing the value given:
Abdul will rent a car for the weekend. He can choose one of two plans. The first plan has an initial fee of $38 and costs an idditional $0.11 per mile driven. The second plan has an initial fee of $49 and costs an additional $0.07 per mile driven.
How many miles would Abdul need to drive for the two plans to cost the same?
Answer:
275 miles
Step-by-step explanation:
Let the distance travel be X
First plan:
Initial fee: 38
Per mile: 0.11
So the total cost is
C1 = 38 + 0.11X
Second plan:
Initial fee: 49
Per mile:0.07
So the total cost is
C2 = 49 + 0.07X
Since the question asked about when the total cost be the same, we can say that C1 = C2
C1 = C2
38 + 0.11X = 49 + 0.07X
0.11X - 0.07X = 49 - 38
0.04X = 11
X = 11/0.04 = 275
At 275 miles, the cost will be the same.
