Answer:
60+4.5pi
Step-by-step explanation:
6×10 obv + area of circle pi(r^2) and half that for a semi cirxle
Answer:
The gold shipment truly is made of 75% gold, but the designer concludes that it is made of less than 75% gold. The designer will reject the shipment of gold and miss out on an honest business relationship with the supplier.
Step-by-step explanation:
Type I error is defined as the rejection of the true null hypothesis. It is also called as the 'false positive' conclusion or 'false positive' findings. The value of alpha or the significance level determines the probability of making the error type I.
In the context, it is given that for a gold piece to be of 18 karat , the piece of jewelry must be made of 75% of pure gold.
The null hypothesis is, H0: The proportion of metal that is gold is 75%
The alternative hypothesis is Ha: The proportion of metal that is gold is less than 75%.
Thus the type I error is when the gold shipment is made of 75% gold but the jewelry designer rejects the shipment thinking that the shipment is made of less than 75% gold.
Thus it shows the error of type I rejecting the null hypothesis.
Answer:
a) The confidence level is 95%.
b) If the confidence interval, in seconds, is (4.0, 202.2) and the claim is that the population mean is greater than 90 seconds, we conclude that there is no enough evidence for that claim.
Step-by-step explanation:
a) If the hypothesis test is performed with a significance level of α=0.05, the confidence level that corresponds to this significance level is 95%:
If the confidence interval, in seconds, is (4.0, 202.2) and the claim is that the population mean is greater than 90 seconds, we conclude that there is no enough evidence for that claim.
The reason is that, with this confidence level, the confidence interval includes values that are below 90 seconds.
To have evidence to support that claim, the lower bound of the interval shouold have been greater than 90 seconds.
The answer is -6. because 12,10,8,6,4,2,0,-2,-4,-6.
Answer:
$71
Step-by-step explanation:
Since x denotes the number of miles and we know that the car rode 100 miles, this means that x=100, and when we plug this in, we get C(x) = 0.5* 100 + 21 = 50 + 21 = $71. Hope this helps!