A random sample of n = 9 scores is selected from a normal distribution with ? = 80 and ? = 12 . What is the probability that the sample mean will be between 76 and 84?
a. 0.9974 c. 0.3830
b. 0.6826 d. 0.2586
B
You might also like to view...
When a person's level of environmental press is slightly higher than their adaptation level, they will experience a(n) a. state of negative affect and maladaptive behavior. b. zone of maximum performance potential
c. adaptation level. d. zone of maximum comfort.
If you take 2 g of vitamin C every day, then your expected number of sick days is ______.
A. 3 B. 2 C. 1 D. 0
During the period before the Renaissance, which of the following was true??
a. ?Astrology was met with great skepticism. b. ?Superstition influenced most everyone from peasants to kings and the clergy. c. ?People were classified into three groups: believers, nonbelievers, or questioners. d. ?Scientific inquiry and reason were encouraged.
In his book, The Adolescent Society, sociologist James Coleman expressed deep concern that American adolescents
A) were becoming radicalized by the civil rights movement. B) rejected the importance of learning and academic success. C) were more interested in literature and the arts than in the sciences. D) were becoming sexually active at younger ages.