In a certain senior high school, it is estimated that approximately 15% of the students ride bicycles in going to school. In a random sample of 90 senior high students, 19 are found to ride bicycles in coming to class. What is the value of the population proportion?0.150.210.294.74

At a high school, the probability that a student is a senior is 0.25. The probability that a student plays a sport is 0.20. The probability that a student is a senior and plays a sport is 0.08.What is the probability that a randomly selected student plays a sport, given that the student is a senior?A.0.08B.0.17C.0.32D.0.25

According to previous studies, 16% of the U.S. population is left-handed. Not knowing this, a high school student claims that the percentage of left-handed people in the U.S. is 15%.The student is going to take a random sample of 2100 people in the U.S. to try to gather evidence to support the claim. Let p be the proportion of left-handed people in the sample.Answer the following. (If necessary, consult a list of formulas.)(a)Find the mean of p.(b)Find the standard deviation of p.(c)Compute an approximation for P≥p0.15, which is the probability that there will be 15% or more left-handed people in the sample. Round your answer to four decimal places.

At Taft High School, 59% of all students participate in after-school sports and 23% participate in both after-school sports and volunteer activities. What is the probability that a student participates in volunteer activities given that the student participates in after-school sports?A.36%B.82%C.59%D.39%

A University student population is represented in three age groups are followed:Student Age-GroupStudent Proportion (%)18-2545%26-4436%45-6419%Which student age group represents the highest proportion?

In an all boys school, the heights of the student body are normally distributed with a mean of 67 inches and a standard deviation of 5 inches. What percentage of the students are between 59 and 80 inches tall, to the nearest tenth?Statistics Calculator