Thirty students in a science class each perform the same experiment and measure the temperature of a solution. Which will provide the most valid inference about the temperature of the solution? A.
averaging the temperatures measured by five students whose names were picked from a stack of shuffled cards

B.
averaging the temperatures measured by five students who work together as a lab team

C.
averaging the temperatures measured by the six students with the highest scores on the last test

D.
averaging the temperatures measured by the first six students who enter the classroom the day after the experiment

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?

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

Two numbers have a sum of 93. if one number is p, express the other number in terms of p.