Confidence intervals are a means of assessing the accuracy of sample data. If you read that the average expected range of birth weight of newborns in your area falls between 2 and 12 lbs, what additional information is required in order to predict a 95% confidence interval in terms of birth weights?
A. z-score and standard error of the sample
B. mean and standard deviations of the sample, and z-score
C. mean and standard deviations of the sample
D. mean and z-score of the sample
Answer: B
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Santiago lives in Sydney, Australia. His friend Carter currently lives in Berlin, Germany. Santiago and Carter often communicate with each other through Skype. To find a suitable time to chat, Mark looked up a chart of world times and found the following:
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Santiago and Carter are not able to chat between 9:00 am and 4:30 pm their local time as they have classes. Also, from 11:00 pm till 7:00 am their local time, they won’t be able to chat because they will be sleeping.
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When would be a good time for Santiago and Carter to chat? Write the local times in the table
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Place
Time
Sydney
Berlin
What will be an ideal response?
Before giving the essay test, write down what you regard as the best answer to each of your essay questions in order to
a. have a standard for evaluating students’ responses. b. ensure that anyone can grade the students’ exams. c. ensure that your questions are clear and concise. d. have a standard for evaluating the items.
A sociologist has gathered crime statistics relating socioeconomic status (SES) and annual salary of parents on the criminality in their offspring. The correlation between SES and criminality is .64. The correlation between salary and criminality is .43. The correlation between SES and salary is .68. Determine the multiple correlation for these data. If salary is held constant what is the effect of SES on criminality?
What will be an ideal response?
A student teacher should NOT be expected to run personal errands for the cooperating teacher
Indicate whether this statement is true or false.