If you learn that your score on an exam was 81 and the mean was 69, would you be more satisfied if the standard deviation was 6 or if it was 15?

Question 4Your instructor tells you that the recent exam had a mean of 80 points and a standard deviation of 2.3. Interpret the standard deviation value in everyday language.1 pointThe maximum score was 82.3.Most students earned an 80 on the exam.The typical score was 2.3 points away from the mean.The range of scores was 4.6.

On a nationwide test taken by high school students, the mean score was 49 and the standard deviation was 12. The scores were normally distributed. Complete the following statements.(a) Approximately 95% of the students scored between and .(b) Approximately of the students scored between 13 and 85.

Question 16Not yet answeredMarked out of 1.00Flag questionTipsQuestion text"A class of 50 students scored an average of a 73 on the final exam. Given the standard deviation is 5, what is the value of t for a student who scored a 67?"Question 16Answera.-8.49b.-16.97c.-17.5d.-7.07Clear my choiceQuestion 17Not yet answeredMarked out of 1.00Flag questionTipsQuestion textTI=83 graphing calculators are more useful in which of the following subject functions?Question 17Answera.Statistics, trigonometry, and algebrab.Only statistics and algebrac.Only statisticsd.Only statistics and trigonometryClear my choiceQuestion 18Not yet answeredMarked out of 1.00Flag questionTipsQuestion textWhat is an outlier?Question 18Answera.an observation that may indicate that the distribution is skewed and that one should be very cautious in using tools or intuitions that assume a normal distributionb.an observation that is numerically distant from the rest of the datac.an observation that is often indicative either of measurement error or of the population having a heavy-tailed distributiond.all of these answersClear my choiceQuestion 19Not yet answeredMarked out of 1.00Flag questionTipsQuestion textWhen is the root-mean-square especially useful?Question 19Answera.when a data set includes both positive and negative numbersb.when a data set includes both discrete and continuous valuesc.when a data set includes exclusively positive numbersd.when a data set includes exclusively negative numbersClear my choiceQuestion 20Not yet answeredMarked out of 1.00Flag questionTipsQuestion textLooking at a scatter plot and seeing how close the points are to a line helps to determine what about the statistical relationship?Question 20Answera.verticalityb.strengthc.horizontalityd.direction

Suppose the scores on an exam are normally distributed with a mean μ = 75 points, and standard deviation σ = 8 points.The instructor wanted to "pass" anyone who scored above 69. What proportion of exams will have passing scores? 0.1587 0.75 0.2266 0.7734 −0.75

Question 14A random sample of 61 Basic Statistics students were asked what they thought of statistics on a scale of 0 (very stupid) to 100 (very nice). Interestingly, students seem to find statistics quite nice: the sample mean equals 83. The sample standard deviation equals 7. We know that the standard deviation in the population (all BS students) is 8. Calculate the 90% confidence interval. 1 point(81.53, 84.47) (81.24, 84.76) (81.32, 84.68) (80.99, 85.01)