Question

3. A survey was conducted about the cost for a family of four to visit an amusement park for one day. A sample

of 32 families yielded an average cost of $190.28 with a standard deviation of $51.75. Last year, a magazine

published that the average cost for a family of four to visit an amusement park was $175. Based on the sample

data above, can we conclude that the mean cost is actually higher than this at α=0

3. According to a large local high school, senior students have a mean GPA of 3.07. A random sample of 38

seniors taking AP courses showed a mean GPA of 3.29 with a standard deviation of 0.42. At the 1% level of

significance, can it be stated that seniors taking AP courses have a different GPA than the senior class as a

whole?

Answer 1