Why do you need a different formula what calculating a confidence interval for a sample with an unknown standard deviation than for a sample with a known standard deviation?
What will be an ideal response?
When the population standard deviation is unknown, we can only use an estimate of that value from our sample, changing the sigma-sub-x-bar to an s-sub-x-bar. This is the first change to the formula. However, extreme values are more common in samples. This changes the shape of the sampling distribution, requiring a t-distribution instead of a z-distribution. This is the second change to the formula.
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Dividends that are paid to owners would affect both the
A) balance sheet and statement of cash flows. B) balance sheet and income statement. C) income statement and statement of changes in equity. D) income statement and statement of cash flows.
Julius Holt, manager of operations at SigmaScan Industries, has decided to change careers. For years, SigmaScan has been a market leader in manufacturing DVD players, but sales-and Julius's advancement opportunities-have been declining for years. He told his wife, "Recent ________ have allowed smartphones and streaming to emerge as substitutes for DVD players. That's reality, and I need to face it."
A. smoothing strategies B. benchmarking trends C. barriers to entry D. technological advances E. buffering strategies
Katie is 16 years old. If she is part of the statistical majority, she reasons at ______.
a. the conventional level b. the preconventional level c. the postconventional level d. stage 2
Which of the following describes the classification and normal balance of the fees earned account?
A) asset, credit B) liability, credit C) owner's equity, debit D) revenue, credit