) It has been estimated that 53% of all college students change their major at least once during the course of their college career. Suppose you are told that the sample proportion for a random sample was 0.48. Furthermore, you are told that the probability of geing a sample proportion of this size or smaller is 14%. What must have been the sample size?

116 students

Step-by-step explanation:

The standard deviation for a proportion is:

For any measured sample proportion x, the z score is given by:

The population proportion is 0.53

At the 14th percentile, the corresponding z-score is z =-1.08.

Since 0.48 is at the 14th percentile, the standard deviation is:

Therefore, the sample size 'n' is given by:

The sample size must have been of 116 students.

sites:

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°