To find how many pennies Ella has in all, just do 50 * 10. Cross the two zeros out and drop them as part of the answer. Then do 5 * 1 to get 5. When you do this, your answer is 500. Ella has 500 pennies in all.
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Answer:
D. 60%
Step-by-step explanation:
Of the 65% who study either time, 47% study on weekends. That means 65%-47% = 18% study on weeknights only.
The fraction who study on weeknights is the total of the fraction who study on weeknights only (18%) and the fraction who study on weeknights and weekends (42%). That total is ...
18% +42% = 60% . . . . fraction who study on weeknights
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It can be helpful to draw yourself a Venn diagram.
Mean of older groups = 16
Mean of younger groups = 14
If you tested two age groups on the number of details, Further suppose that you fail to reject the null hypothesis for this independent samples t-test.
the difference between these sample means,
As we fail to reject the null hypothesis, the sample means probably came from the same population, and the difference is just due to sampling error.
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The probability that a sample of size n will have a mean,
, less that a given value, X, where the population mean,
, and the population standard deviation,
, is known is given by:
Therefore, the required probability is given by: