In April and May of 2011, the Pew Research Center surveyed cell phone users about voice calls and text messaging. They found that 55% of those who send 51 or more text messages per day prefer to be contacted by text message rather than by a voice call. The margin of error for this sample was 5.7%. What does this margin of error tell you about the results of the survey

Step-by-step explanation:

The margin of error is a statistical tool used to describe how a set off sample data that is being analyzed will accurately correspond with the overall data.

Basically, the margin of error explains how accurate and effective the result from the analysis or a survey is.

This means that the large the margin of error the less accurate the result will be.

An acceptable margin of error typically falls between 4% and 8% at the 95% confidence level.

The margin of error for this sample was 5.7% this means that

49.3% (= 55% – 5.7%) and

60.7% (= 55% + 5.7%)

of cell phone users  will prefer to be contacted by text message

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

step-by-step explanation: