suppose that you are in a class of 18 students and It is assumed that 15% of the population is left handed.
a. compute probability that exactly 5 students are left handed( 3 decimal places)
b. probability that at most 4 students are left handed (3 decimal places)
c. probability that at least 6 students are left handed (3 decimal places)

What proportion of college students plan to major in Business? You survey a random sample of 250 first-year college students, and you find that 57 of these students indicate they plan to pursue a major in Business. Use this information to construct a 90% confidence in order to estimate the population proportion of college students who plan to major in Business.

Should students with learning disabilities be entitled to academic accommodations? If so, what accommodations should students with learning disabilities have right to? Should such accommodations be made at all levels of education (i.e., elementary school, secondary school, college and university)? Would granting accommodations to students with learning disabilities be unfair to students without learning disabilities?

A university financial aid office polled a random sample of 528 male undergraduate students and 419 female undergraduate students. Each of the students was asked whether or not they were employed during the previous summer. 404 of the male students and 248 of the female students said that they had worked during the previous summer. Give a 80% confidence interval for the difference between the proportions of male and female students who were employed during the summer.

Step 1 of 3 : Find the point estimate that should be used in constructing the confidence interval. Round your answer to three decimal places.

Step 2 find the variance

step 3 find the standard deviation

The scores of students on the ACT (American College Testing)college entrance examination in a recent year had the normal distribution with meanμ= 18 and standard deviationσ= 6. 100 students are randomly selected from all who took the test

a.What is the probability that the mean score for the 100 students is between 17and 19 (including 17 and 19)?

b.A student is eligible for an honor program if his/her score is higher than 25.Find an approximation to the probability that at least 15 students of the 100 students are eligible for the honor program.

c.If the sample size is 4 (rather than 100), what is the probability that more than50% (not include 50%) students are eligible for the honor program?

3)

A sample of midterm grades for five students showed the results: 72, 65, 82, 90, and 76. Based on the data, which of the following statements are correct, and which should be challenged as being too generalized? Justify your answer. a. The average midterm grade for the sample of five students is 77. b. The average midterm grade for all students who took the exam is 77. c. An estimate of the average midterm grade for all students who took the exam is 77. d. More than half of the students who take this exam will score between 70 and 85. e. If five other students are included in the sample, their grades will be between 65 and 90.

A teacher is currently teaching two statistics​ classes, one at​ 8:00 A.M. and the other at​ 10:00 A.M. The accompanying table summarizes the attendance records by showing the probability of the number of absent students per class. Complete parts a and b.

   Probability  
Number of Absent Students 8 A.M. Class 10 A.M. Class

a. Calculate the mean number of students absent for each class.

1. Calculate the mean number of students absent from the​ 8:00 A.M. class.

2. Calculate the mean number of students absent from the​ 10:00 A.M. class.

b) Calculate the standard deviation for the number of students absent for each class.

1. Calculate the standard deviation number of students absent from the​ 8:00 A.M. class.

2. Calculate the standard deviation number of students absent from the​ 10:00 A.M. class.