تم الحل ✓
categoryإحصاء
schoolبكالوريوس
event_available2026-07-15
السؤال
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Calculation:
m. When the mean is 79 and the standard deviation is 4, the z-score for the value 62 is equal to........
Calculation:
n. A delivery route must include stops at five cities. If the route is randomly selected, the probability that the
cities will be arranged in alphabetical order is equal to.
Calculation:
0.
Given that event E has a probability of 0.31, the probability of the complement of event E-.
Calculation:
p. If A and B are independent events with P(A)=0.65 and P(ANB) -0.26, then, P(B)-..
Calculation:
A and B are mutually exclusive events with P(A) = 0.3 and P(B) 0.5, then P(ANB)-
Calculation:
I. If A and B are mutually exclusive events with P(A)=0.3 and P(B)=0.5, then P(AUB)
Calculation:
8. For a certain manufacturing process, it is known that, on the average, 1 in every 100 items is defective. The
probability that the fifth item inspected is the first defective item found is equal to
Calculation: (Hint: Use the geometric distribution)
L
An individual has 3 different email accounts. Most of her messages, in fact 70%, come into account #1,
whereas 20% come into account #2 and the remaining 10% into account #3. Of the messages into account #1,
only 1% is spam, whereas the corresponding percentages for accounts #2 and #3 are 2% and 5%, respectively.
The probability that a randomly selected message is spam, is equal to......
Calculation: (Hint: Use the conditional probability)
1
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