= Several psychology students are unprepared for a surprise true/false test with 17 questions, and all of their answers are guesses. a. Find the mean and standard deviation for the number of correct answers for such students. b. Would it be unusual for a student to pass by guessing (which requires getting at least 15 correct answers)? Why or why not? a. μ = (Do not round.)

A health care professional wishes to estimate the birth weights of infants. How large a sample must be obtained if he desires to be 95% confident that the true mean is within 3 ounces of the sample mean? Assume that the standard deviation of the population is 5 ounces. O None of these answers O 11 15 O 10

Three students were applying to the same graduate school. They came from schools with different grading systems. Student GPA School Average GPA School Standard Deviation Thuy 2.6 2.4 0.5 Vichet 83 90 20 Kamala 8.7 8.2 0.8 Table 2.74 How many standard deviations is each student away from hiir school average? If the student GPA is higher than his school average, enter this as a positive number. If the student GPA is lower than his school average, enter this as a negative number. Thuy is Number standard deviations from Thuy's school average. Vichet is Number standard deviations from Vicheť's school average. Kamala is Number standard deviations from Kamala's school average. Which student had the best GPA when compared to other students at his school? O Thuy O Vichet O Kamala

Pls. answer all the given questions with solutions. will upvote if complete, thanks!