In STAT 110, 73% of students earned at least a B on the part of the grade for attendance and participation. Of the students who earned at least a B on attendance and participation, 82% of those earned at least a B on the exams. Of the students who earned lower than a B on attendance and participation, only 48% earned at least a B on the exams. a) Draw an appropriate diagram (tree or Venn) for this problem, including all of the probabilities. b) What is the probability a randomly chosen student will have earned a B on the exams?

Summary:

Answer the following questions in detail. You have three hours to complete the final exam.

Question 1:

Student life is full of stressors. Give three sources of stress and explain how they affect students’ academic performance.

Question 2:

Time management is one way colege students can use to reduce stress. Give three time management techniques and explain how they can halp students manage their time better and improve their academic performance.

Below you are given ages that were obtained by taking a random sample of 6 undergraduate students. Assume the population has a normal distribution.

A large university is interested in learning about the average time it takes students to drive to campus. The university sampled 238 students and asked each to provide the amount of time they spent traveling to campus, the average and standard deviation were 21.5 and 4.32 respectively. This variable, travel time, was then used conduct a test of hypothesis. The goal was to determine if the average travel time of all the university's students differed from 20 minutes. Use a level of significance of 0.05. (p value method)

Three professors at the University of Macau compared two different approaches to teaching courses in the faculty of business administration. At the time of the study, there were 2,100 students in the faculty, and 96 students were involved in the study. Demographic data collected on these 96 students included year of study (first, second, third, fourth), age, gender, and major. The demographic variable of year of study is an example of a. none of the other choices. b. a discrete numerical variable. c. a continuous numerical variable. d. a categorical variable.

A dean of a business school is interested in determining whether the mean grade point average (GPA) of students is different from 3.04. The population standard deviation is 0.41. A random sample of 200 students indicates a sample mean GPA of 2.94. A test is conducted at the 0.05 level of significance to determine whether the mean grade point average (GPA) of students is different from 3.04. What is the test statistic value in this test?

Select one:

a. -3.449

b. +0.244

c. -0.244

d. +3.449

A report claims that 46​% of​ full-time college students are employed while attending college. A recent survey of 60 ​full-time students at a state university found that 28 were employed. Use the​ five-step p-value approach to hypothesis testing and a 0.05 level of significance to determine whether the proportion of​ full-time students at this state university is different from the national norm of 0.46. find the t statistic find the p value find the critical value

A researcher wishes to prove that less than 40% of students support the changes announced by the Ford
government in January 2019 to tuition, the Ontario Student Assistance Program, and student fees. If 32% of all
students support the changes, what is the chance that a random sample of 250 students provides insufficient proof
to meet a 5% significance level? In other words, what is the probability of a Type II error? Answer with hypotheses in
formal notation, TWO fully-labelled graphs, a quantitative analysis & the requested probability

Suppose that, for students who are enrolled in college algebra, 72 percent are freshman, 40 percent are female, and 25 percent are female and freshman. Your answers should be entered as decimals and rounded to three decimal places.

(A) one student will be selected at random. What is the probability that the selected student will be a freshman or female (or both)? ___

(B) one student will be selected at random. What is the probability that the selected student will not be a freshman? ___

(C) two students will be independently selected at random. What is the probability that both of the selected students will be female? __