At brighton middle school, mr. yule asked 50 randomly selected students from each grade level about their favorite subject, and 12 chose science. he used this data to draw the inference that about 25% of middle school students will indicate science is their favorite subject. if there are 200 students altogether, did he make a reasonable inference? a. no, mr. yule’s sample is biased and too small to be representative of the population. b. yes, mr. yule’s sample is small and biased, so it is representative of the population. c. no, mr. yule’s percentage is too large. he should have used 6%. d. yes, mr. yule’s sample is random and representative of the population.

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6

Which graph represents the same relation is the sa which graph represents the same relation as the set {(-3-2)}

Acell phone company offers two plans to its subscribers. at the time new subscribers sign up, they are asked to provide some demographic information. the mean yearly income for a sample of 40 subscribers to plan a is $45,000 with a standard deviation of $9,200. for a sample of 25 subscribers to plan b, the mean income is $64,300 with a standard deviation of $7,100. at the 0.025 significance level, is it reasonable to conclude the mean income of those selecting plan b is larger? assume unequal population standard deviations. hint: for the calculations, assume the plan a as the first sample. what is the decision rule? (negative amount should be indicated by a minus sign. round your answer to 3 decimal places.) compute the value of the test statistic. (negative amount should be indicated by a minus sign. round your answer to 2 decimal places.) what is your decision regarding h0 ? reject h0 fail to reject h0 compute the p-value. less than 0.01 between 0.01 and 0.025 between 0.025 and 0.05 between 0.05 and 0.10 greater than 0.10