7. A scatter plot was created to show the relationship

between the number of staff members and students

at various schools. The scatter plot's trend line has an

equation of y = 0.1x + 18, where y is the total number

of staff members and x is the total number of

students.

Use the equation to predict the number of students in

a school with 120 staff members.

A. 1,038 students

B. 30 students

C. 890 students

D. 1,020 students

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