9514 1404 393
Answer:
(b) It means that the results that Tessa obtained are too unusual to be explained by chance alone
Step-by-step explanation:
The test for statistical significance is a comparison of the result to the probability that it occurred by chance. The probability of a chance occurrence is usually set at 1% or 5%. The lower the percentage, the less likely a chance occurrence is, and the more difficult showing statistical significance becomes.
Answer:
45,90,135,180,225
Step-by-step explanation:
Answer:
(7 + 11) - (4 x 2)
Step-by-step explanation:
Adding 7 and 11 gets you to 18
To get to 10 from 18, you need 8
8 can be created by multiplying 4 and 2
Hence, the answer is (7 + 11) - (4 x 2)
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Answer:
a) 0.5763 b)0.2119 c)0.2119
Step-by-step explanation:
In order to find find the probability that the battery lasts between 24 and 28 months, we have to find z
Z = (x – mean)/standard deviation
Le x be hours a battery last
P (24<x<28) = P((24– 26)/2.5 < z < (28– 26)/2.5)
P (24<x<28) = P(-0.8< z < 0.8)
Then we use the z table to find the area under the curve.
P (24<x<28) = 0.5763
the probability that the battery lasts longer than 28 hours
P (x>28) = P(z > (28– 26)/2.5)
P (x>28) = P(z > 0.8)
Then we use the z table to find the area under the curve.
P (x>28) = 0.2119
the probability that the battery lasts less than 24 hours
P (x<24) = P(z < (24– 26)/2.5)
P (x<24) = P(z < -0.8)
P (x<24) = 0.2119