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Question
The table below provides summary information about students in a class. The sex of each individual and their age is given.| Male | Female | Total | |
Under 20 yrs old |
10 | 8 | 18 |
Between 20 and 25 yrs old. |
12 | 18 | 30 |
| Older than 25 yrs. | 26 | 26 | 52 |
| Total | 48 | 52 | 100 |
If a student is randomly selected from this group, what is the probability that the student is a female who in under 20 years old?
a) 0.08
b) 0.18
c) 0.52
d) 0.26
e) 0.78
Answer
This answer is hidden. It contains 1 characters.
Related questions
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Q:
The mean square error (MSerr) is calculated by dividing the sum of squares error (SSerr) by the number of error degrees of freedom (dferr).
Q:
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0.292143
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1
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4
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5
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Q:
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1
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4
0.224675
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5
3.775 Annie's sample size is __________.
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Q:
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Q:
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Q:
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Q:
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Q:
A random sample of 400 items from a population shows that 160 of the sample items possess a given characteristic. A random sample of 400 items from a second population resulted in 110 of the sample items possessing the characteristic. Using this data, a 99% confidence interval is constructed to estimate the difference in population proportions which possess the given characteristic. The resulting confidence interval is _______.
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Q:
A researcher is interested in estimating the difference in two population proportions. A sample of 400 from each population results in sample proportions of .61 and .64. A 90% confidence interval for the difference in the population proportions is _______.
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Q:
Maureen McIlvoy, owner and CEO of a mail order business for wind surfing equipment and supplies, is reviewing the order filling operations at her warehouses. Her goal is 100% of orders shipped within 24 hours. In previous years, neither warehouse has achieved the goal, but the East Coast Warehouse has consistently out-performed the West Coast Warehouse. Her staff randomly selected 200 orders from the West Coast Warehouse (population 1) and 400 orders from the East Coast Warehouse (population 2), and reports that 190 of the West Coast Orders were shipped within 24 hours, and the East Coast Warehouse shipped 372 orders within 24 hours. Assuming a= 0.05, the observed zvalue is ___________________.
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