Suppose a sample of 400 participants was randomly selected from the middle schools and high schools in a large city. These participants responded to the question: Which type of movie do you prefer to watch?

160 participants preferred action movies.
80 participants preferred drama movies.
40 participants preferred science-fiction movies.
240 participants were females.
78 female participants preferred drama movies.
32 male participants preferred science-fiction movies.
60 female participants preferred action movies.

At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec