A random sample of 100 drivers was asked how many times they had to take driving test to gain their driving licence. It was found that more than half of them needed to take the test exactly 2 times and nobody needed to take the test more than 6 times. Which of the following are valid conclusions about the mean of the number of times they had to take the driving test? Answers: It is greater than 2. It is equal to 2. It is not equal to 5. It is greater than 1 but less than 4.

Results from of a survey of 50 students indicated that 30 like red jelly beans,29 like green jelly beans, and 17 like both red and green jelly beans. How many of the students surveyed like no green jelly beans ?

Last semester, Bonnie took a different Biology teacher than her friend Tony. After the final exam, they compared test scores. Bonnie earned an 83 (mean = 75.6, sd = 5), and Tony earned an 87 (mean = 80.3, sd = 7). Who did better? Why?

The reaction times of ten subjects was measured. The median reaction time was 3.7s seconds.  The reaction times of nine of the subjects were  3.5s, 3.5s, 3.5s, 3.6s, 3.7s, 3.8s, 3.8s, 3.9s, 3.9s.   Was the tenth reaction time?

Suppose that 10 students have taken an exam and that the mean and median scores are both 60. (Since 10 is an even number you can assume that two scores in the middle are both 60.) Two more students take it and one scores 70 and the other scores 26. If these students are now included, what is the new mean? What is the new median?

th Last year over 8000 students took an entrance exam at a certain state university. Tom's score was at the 55 percentile. Leila's score was at the 86 percentile. (a) Which of the following must be true about Tom's and Leila's scores? O Tom scored higher than Leila. O Both Tom and Leila scored higher than the median. O Leila answered 31 more questions correctly than Tom. O Tom's and Leila's scores were both in the bottom half of all scores. (b) Which of the following must be true about Tom's score? O Tom scored lower than about 55% of the students who took the exam. O Tom got about 55% of the questions correct. Tom scored higher than about 55% of the students who took the exam. Tom got about 55% of the questions wrong. Submit Assignme Continue iert 144 %23 4. 6. 8 R Y U H K L A. D paus V. B M alt ctri alt USE YOUR Dew de LL

The dean at a large college wants to determine the average SAT scores for students who apply from New York. She surveyed 80 students from New York and discovered a mean SAT score of 1,512. Which of the statements below represent the statistic and the sample, respectively, of the survey?  I. The mean SAT score of all students from New YorkII. The mean SAT score of 80 students from New YorkIII. The 80 students who apply to the college from New YorkIV. All students who apply to the college from New York a Statements I and II b Statements II and III c Statements I and IV d Statements II and IV

A mathematics professor lost a test paper belonging to one of her students. She remembered that the mean score for the class of 20 was 81 and that the sum of the 19 other scores was 1530. What was the grade on the paper she lost?

The Computer Anxiety Rating Scale (CARS) measures an individual’s level of computer anxiety, on a scale from 20 (no anxiety) to 100 (highest level of anxiety). Researchers at a large university administered CARS to 80 business students. One of the objectives of the study was to determine whether there is a difference between the level of computer anxiety experienced by female students and male students.     Of the 80 student survey takers, 40 were male, 40 were female. The results are in the table below for statistical analysis of variability between the two samples. All of these analyses are run with a 95% level of confidence.         Males Females Sample Mean 40.26 36.85 Sample Standard Deviation 13.35 9.42        Perform the test chosen in part (d) of the previous problem and supply this information:       a. What is the value of the test statistic?   b. Find the probability of getting these results if there is no difference in anxiety ratings between the…

8 students took a test. 3 of them scored 4, 4 and 7 marks respectively. Given that the median and mode is 5, the upper quartile is 8 and the largest score is thrice the smallest score, find the scores of the other 5 students.