Wednesday
December 11, 2013

# Posts by tracy

Total # Posts: 705

Elmentary Math for Teachers II
From a set of eight marbles, five red and three white, we choose one at random. What are the odds in favor of choosing a red marble?

Elmentary Math for Teachers II
From a set of eight marbles, five red and three white, we choose one at random. What are the odds in favor of choosing a red marble?

Elmentary Math for Teachers II
In a class of seven students, a teacher spins a seven-sectored spinner (with equal-sized sectors) to determine which students to ask questions. Determine about how many times a student can expect to be called on when 100 questions are asked.

stat
Explain why using the t statistic may be an appropriate alternative to using a z-score

Math
I need help with this these two problem PLEASE!!! For a population with a mean of μ  80 and a standard deviation of   12, find the z-score corresponding to each of the following samples. a. M  83 for a sample of n  4 scores b. M  83 for a sample of...

Math
If the population standard deviation is   8, how large a sample is necessary to have a standard error that is: a. less than 4 points? b. less than 2 points? c. less than 1 point?

chemistry 101
pls can anybody check my answers

chemistry 101
If 15g of NaOh is dissolved in 285 g of water, calculate the following. Assume the density of the solution is 1.06 g/cc. a) Calculate the moles of NaOH in the solution? My answer is 15gNaOH/40g NaOH= .0375 mole NaOH b) Waht is the mass % w/w of the solution? My answer is 15g N...

Math Help
It takes Andy and Ben the same amount of time to eat 1 large piece of chocolate. It takes Charlotte 3 more mins than Andy and Ben to eat the same piece of chocolate. One day, Andy, Charlotte and Ben share 2 pieces of chocolate among them. It takes them 5 mins to eat 2 pieces o...

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