What speed is at least 1.5 standard deviation units above the mean?
A national survey of speeds on interstate highways found that the average speed of 9,549 automobiles was 73 mph, with a standard deviation of 10 mph.
Ans: 88 mph
You might also like to view...
Which work culture would best suit your nature if your primary motive was one of power?
a) Bureaucratic b) Innovative c) Supportive d) Conventional
Children who are less attractive are naturally more friendly than children who are physically appealing
Indicate whether the statement is true or false.
A teacher observed that during the weeks when the children in her class used computer drills the boys made much higher scores on the spelling quizzes. The teacher wished to investigate this observed relationship in a systematic way. Which of the following research hypotheses would be appropriate for this investigation?
a. Computer drills are superior in teaching boys to spell. b. Use of computer drills results in higher spelling achievement for boys than the use of traditional materials. c. There will be no significant difference in the spelling achievement of boys taught by computer drills and those taught by traditional materials. d. Classroom teachers do not use appropriate materials in teaching boys to spell. e. Boys have fewer opportunities to respond and to receive reinforcement in the traditional classroom, which affects their spelling achievement.
A(n) ______ evaluation is conducted while the evaluand is being implemented in order to provide information to improve it.
A. delayed B. formative C. internal D. practical