Gregor Mendel crossed two breeds of peas and examined the crop. He found 892 wrinkled green peas, 378 smooth green peas, 618 wrinkled yellow peas, and 241 smooth yellow peas.
a. If he picked a smooth pea at random from his crop, what is the probability that it was yellow?
b. If he picked a pea at random from his crop, what is the probability that it was yellow or smooth?
c. If he picked a pea at random from his crop, what is the probability that it was green and wrinkled?
Data set 28 shows the weight, in grams, of a sample of sugar packets.
a. What is the sample standard deviation?
b. What is the median of the sample?
c. Give a boxplot of the sample.
d. Give a histogram with seven classes for the sample.
e. Test whether the sample came from a normally-distributed population, and justify your conclusion.
f. Give a 92%-confidence interval for the mean of the population of packets from which this sample was drawn.
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