Answer:
This is a left-tailed test about a population's mean claim, with known population standard deviation.
c) Claim is alternative, fail to reject the null and cannot support calim as test statistic (-0.89) is not in the rejection region defined by the critical value (-2.05)
Step-by-step explanation:
The claim is alternative because it does not contain an equality. Since we are testing a claim about a population mean when the population standard deviation is known, the statistic in this case is z.
x is the sample mean, u is the population parameter, s is the population standard deviation and n is the number of items sampled.
z = -0.89
The rejection region is going to be the 0.02 (the alfa level) that is to the left of the probability distribution because this is a left-tailed test since the claim is that the population mean is less than 2.8 years. This region is going to be limited by the critical value -2.05.
In a z-core table we can see that for a z = -2.05 the area to the left of the distribution is 0.0202 ≈ 0.02 which is the significance level.
(Bc)/(ab)=tan1
(Ef)/(ec)=tan2
Angle 1= angle 2
Tan1=tan2
(Bc)/(ab)=(ef)/(ec)
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Answer:
Remember that 6x^2 and -4x are not like terms. I drew a circle around them since those two will come first then goes the 5 and 3. Hopw this helps, thank you !!
Answer:
Step-by-step explanation:
sector area = angle/360 * pi * r^2
14.14 = angle/360 * 22/7 * 6^2
14.14 = angle/360 * 22/7 * 36
(360 * 14.14 * 7)/(22 * 36) = angle
angle = 44.99 = 45 degrees