Suppose that in a certain chemical process the reaction time y (hr) is related to the temperature (°F) in the chamber in which the reaction takes place according to the simple linear regression model with equation y = 5.00 −.01x and 휎= .075.a. What is the expected change in reaction time for a 1°F increase in temperature? For a 10°F increase in temperature? (2 marks)b. What is the expected reaction time when temperature is 200°F? When temperature is 250°F? (2 marks)c. Suppose five observations are made independently on reaction time, each onefor atemperature of 250°F. What is the probability that all five observationsarebetween 2.4 and 2.6 hr? (6 marks)d. What is the probability that two independently observed reaction times for temperatures1°apart are such that the time at the higher temperature exceeds the time at the lower temperature

How many ordered pairs of positive integers satisfy xy=32?

Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.

The dance committee of pine bluff middle school earns $72 from a bake sale and will earn $4 for each ticket they sell to the spring fling dance. the dance will cost $400 write an inequality to determine the number, t of tickets the committee could sell to have money left over after they pay for this year's dance. what is the solution set of the inequality?