Answer:
(a) Probability he or she will answer all 10 problems correctly is 0.5
(b) Probability he or she will answer at least 9 problems correctly is 0.95
Step-by-step explanation:
(a) Probability is given by number of possible outcomes ÷ number of total outcomes
Number of possible outcomes = 10 problems
Number of total outcomes = 20 problems
Probability he or she will get all 10 problems correctly = 10 ÷ 20 = 0.5
(b) Probability he or she gets at least 9 problems correctly means he or she either gets 9 or the 10 problems correctly
Probability he or she gets at least 9 problems correctly = (9÷ 20) + (10÷20) = 0.45+0.5 = 0.95
Answer:
what the heck is that hard math what grade are you even in?
Step-by-step explanation:
<u>The alternative </u><u>hypothesis</u><u> that </u><u>H1 : µ > 519</u>
What is a hypothesis short answer?
- A hypothesis is an assumption, an idea that is proposed for the sake of argument so that it can be tested to see if it might be true.
- In the scientific method, the hypothesis is constructed before any applicable research has been done, apart from a basic background review.
The mean SAT score in mathematics = 519
: µ = 519 or : µ 519
: µ > 519
Learn more about hypothesis
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-2/3>-5/9
Negative two-thirds is less than negative five ninths. Convert both to a common denominator of twenty-sevenths. Negative two thirds would be -18/27 and -5/9 would be -35/27. Think about which one is less negative (negative two thirds). The one that is less negative is obviously larger.
*I do free online math tutoring if interested.