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Suppose the weights of seventh graders at a certain school vary according to a Normal distribution, with a mean of 100 pounds an
d a standard deviation of 7.5 pounds. A researcher believes the average weight has decreased since the implementation of a new breakfast and lunch program at the school. She finds, in a random sample of 35 students, an average weight of 98 pounds.
What would the P?value tell the researcher in this situation?
a.) the probability that a random sample of students would have a mean of 100 pounds, if the true population mean is 98 pounds
b.) the probability that a random sample of students would have a mean of 98 pounds, if the true population mean is 100 pounds
c.)the probability that a random sample of students would have a mean less than or equal to 100 pounds, if the true population mean is 98 pounds
d.)the probability that a random sample of students would have a mean less than or equal to 98 pounds, if the true population mean is 100 pounds
What would the P?value tell the researcher in this situation?
a.) the probability that a random sample of students would have a mean of 100 pounds, if the true population mean is 98 pounds
b.) the probability that a random sample of students would have a mean of 98 pounds, if the true population mean is 100 pounds
c.)the probability that a random sample of students would have a mean less than or equal to 100 pounds, if the true population mean is 98 pounds
d.)the probability that a random sample of students would have a mean less than or equal to 98 pounds, if the true population mean is 100 pounds
1 answer:
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Answer:
Step-by-step explanation:
Given:
Vertex of the parabola is,
Equation of the parabola in vertex form is given as:
Plug in . This gives,
Therefore, the equation of the given graph is
.
Given:
The probability for success of an event is P(A)
The probability of success of a second, independent event is P(B).
To find:
The probability of both events occurring, in that order.
Solution:
If A and B are two independent events, then
It is given that,
The probability for success of an event is P(A)
The probability of success of a second, independent event is P(B).
Since A and B both are independent event and we need to find the probability of both events occurring, in that order, i.e., , therefore
.
Hence, the correct option is A.