Explain t test for independent means

Assignment Help Basic Statistics

Reference no: EM13154426

Twenty students randomly assigned to an experimental group receive an instructional program; 30 in a control group do not. After 6 months, both groups are tested on their knowledge. The experimental group has a mean of 38 on the test (with an estimated population standard deviation of 3); the control group has a mean of 35 (with an estimated population standard deviation of 5). Using the .05 level, what should the experimenter conclude? (a) Use the steps of hypothesis testing, (b) sketch the distributions involved, and (c) explain your answer to someone who is familiar with the t test for a single sample but not with the t test for independent means.

Reference no: EM13154426

Questions Cloud

What is the marginal product of men : Consider the same animation cel auction as in problem 1. If instead you decide to hold a Vickrey Auction, what will person 2's bid be, if he is behaving optimally?

Net proceeds of the bond issue at time of sale : \The bonds were quoted at 94 and pay interest quarterly on September 30th and December 31st. What were the total proceeds of the bond issue at the time of sale?

What is the heat change in j associated with of gaseous : What is the heat change in J associated with 74 g of gaseous butane at 91 oC changing to solid at -170 oC? c(butane) (gas) = 2.31 J/ (g.K) c(butane) (liq) = 1.65 J/(g.K) c(butane) (s) = 1.32 J/ (g.K) ?Hfus(butane) = 6.885 kJ/mol

Actual manufacturing overhead : At the beginning of the year, the estimated direct labor-hours were 17,900 hours and the total estimated manufacturing overhead was $341,890. At the end of the year, actual direct labor-hours for the year were 16,700 hours and the actual manufact..

Explain t test for independent means : Sketch the distributions involved, and (c) explain your answer to someone who is familiar with the t test for a single sample but not with the t test for independent means.

Gain on the sale of its current plant : Dean uses GAAP On its December 31, year 10 financial statements Dean will defer Gain on the sale of its current plant in the amount of?

How many grams of sodium oxide will be formed : how many grams of sodium oxide will be formed if 46 grams of sodium are used in the reaction. 4Na + O2 yields 2Na2O

Define what is the concentration of the hno solution : What is the concentration of the HNO3 solution? (b) How many moles of NaOH were in excess after the first addition?

Net deferred incoem taxes on balance sheet : Assuming that the enacted tax rate is 30% in both 2010 and 2011 and that krause paid 780,000 in income taxes in 2010, the amount reported as the net deferred incoem taxes on krauses balance sheet at dec 31 2010 should be:

User Account

All Pages