The 90% confidence interval estimate of a population standard deviation when a sample variance of 50 is obtained from a sample of 15 items is
A. 26.8 to 124.356.
B. 5.177 to 11.152.
C. 5.436 to 10.321.
D. 29.555 to 106.529.
Answer: C
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What will be an ideal response?
An 
chart could be used if the quality of the output of the process is measuring a process using sample
A. means. B. variances. C. ranges. D. proportions.
Which of the following is NOT a way to establish feelings of goodwill for your audience?
a. The sincerity of your voice b. Telling them what they want to hear c. Your facial expressions and eye contact d. Your gestures