A new online test preparation company compared 3,025 students who had not used its program with 2,150 students who had. Of those students who did not use the online test preparation program, 1,513 increased their scores on the SAT examination compared with 1,100 who did use the program. A significance test was conducted to determine whether there is evidence that the online test preparation company's students were more likely to increase their scores on the SAT exam. What is the p-value for an appropriate hypothesis test?

a. 0

b. 0.2082

c. 0.4164

d. 0.7198

e.1

1. Suppose you constructed a 90% confidence interval for the true average GPA of California community college students. If all of the sample data were to be held constant, how would this confidence interval compare to an 80% confidence interval based on the same data?

2. A random sample of 100 students was taken to determine interest in switching to a quarter system instead of semesters. Out of the 100 students, 73 stated that they were interested in switching to a quarter system. Construct a 90% confidence interval for the true proportion of students in favor of switching to a quarter system. Make sure to state whether or not the assumptions were met.

[1] A RESEARCHER DISCOVERED FROM A SAMPLE OF 750 STUDENTS WHO TOOK AN I.Q. TEST THAT THE SAMPLE MEAN WAS 100 AND THE SAMPLE STANDARD DEVISTION WAS 15.
[A] IF A STUDENT HAD AN I.Q. SCORE OF 110; BY WHAT PERCENTAGE IS HIS SCORE BETTER THEN ANYONE ELSE.
[B] HOW MANY STUDENTS HAD I.Q. SCORES ABOVE 140.
[C] WHAT IS THE PERCENTAGE OF STUDENTS THAT HAD I.Q. SCORES BETWEEN 90 AND 100.
[D] WHERE WILL THE LOWEST I.Q. SCORE FALL.
[E] IF THE SAMPLE SIZE WAS CHANGED TO 1,000 STUDENTS. WOULD THE ANSWER IN PART [B] ABOVE BE DIFFERENT. EXPLAIN YOUR ANSWER.

This question is about preconception interventions in preventing the development of psychiatric disorders, mandatory reporting of abuse, reducing bullying, how to help families who have members deployed.

1.  Students will discuss how preconception interventions to prevent the development of psychiatric disorders might be integrated into nursing curricula.

2. Students will discuss mandatory reporting of abuse across the life span.

3 Students will identify interventions that are designed to reduce bullying across the life span.

4. Students will identify resources that focus on helping families who have members deployed.

Note: do include 3 scholarly references.

Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired students averaged 9.79 hours of sleep, with a standard deviation of 1.8 hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed.

(a) What is the probability that a visually impaired student gets less than 6.2 hours of sleep?

(b) What is the probability that a visually impaired student gets between 6.9 and 10.22 hours of sleep?

1. You have measured the systolic blood pressure of a random sample of 25 students at KU. A 95% confidence interval for the mean systolic pressure for the students is computed to be (122, 138). Which of the followings statements gives a valid interpretation of the interval?

1. About 95% of the sample of students have systolic blood pressure between 122 and 138

2. About 95% of the students have a systolic blood pressure between 122 and 138

3. If the sampling procedure were repeated many times, then approximately 95% of the sample means would be between 122 and 138

4. The probability that the sample mean falls between 122 and 138 is 0.95

Students have an average GPA of 2.78 with a standard deviation of 0.45.

You have been tasked by the university president to select a random sample of students, and to conduct in-depth interviews with them about how their academics were impacted by COVID-19. We would like the random students that you select to be representative of the entire student body, and therefore the GPA of your sample should be within 0.2 grade points of the population mean.

How many students should you randomly select for interviews if you want to be 99% sure that the mean GPA of your interviewees is between 2.58 and 2.98?

5.4 GPA is approximately normally distributed for all students that have been accepted to UCLA. The average gpa is 4.0 with standard deviation of .2. 50 students were sampled and asked, "what is your gpa?":

a) Calculate the probability the mean gpa is 3.95 or lower

b) Calculate the standard deviation for the sampling distribution.

b) Between what 2 gpa's are considered normal for being accepted at UCLA

c) What gpa represents the top 10% of all students

d) What percent had a gpa above 4.1

e) What % of admitted students had a gpa lower than 3.5

An elementary school is offering 3 language classes: one in Spanish, one in French, and one in German. These classes are open to any of the 89 students in the school. There are 41 in the Spanish class, 31 in the French class, and 22 in the German class. There are 15 students that in both Spanish and French, 7 are in both Spanish and German, and 9 are in both French and German. In addition, there are 4 students taking all 3 classes.

If one student is chosen randomly, what is the probability that he or she is taking at least one language class?

If two students are chosen randomly, what is the probability that neither of them is taking a language class?

A professor wants to determine whether her department should keep the requirement of college algebra as a prerequisite for an Introductory Statistics course. Accordingly, she allows some students to register for the course on a pass-fail basis regardless of whether or not they have had the prerequisite. At the end of the semester, the professor compares the number of students passing or failing the class with whether or not they had algebra. Of the 70 students in the class, 30 out of 45 who have had algebra and 5 out of 25 who have not passed the course. Are students more likely to pass the course if they have taken college algebra?