Construct a 95 percent confidence interval for the difference between the proportions of service contracts sold on treadmills versus exercise bikes. Is there a major difference between the two pieces of equipment? Why or why not?

Is there a major difference between the two pieces of equipment? Why or why not?
April 25, 2020
A social worker in a rural school district is interested in how a new program is affecting the number of days that high school students are truant from school (i.e. absent without permission from parents, doctor, etc.). She takes a sample of 15 students from school records and notes the number of days truant in the year before the program and the year after the program.
April 25, 2020
Construct a 95 percent confidence interval for the difference between the proportions of service contracts sold on treadmills versus exercise bikes. Is there a major difference between the two pieces of equipment? Why or why not?
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