07/12/19

What is an ANOVA test used for?
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06/11/19

homework help please
If you want to ship something to Mars, you can now hire the SpaceX Corporation to send it there. The SpaceX website indicates that they will ship 37,040 pounds of material to Mars for the... more
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06/01/19

Doubt on a simple problem from Mankiw's Macroeconomics?
I've just started studying Macroeconomics and I have a quick doubt about the following problem from Mankiw's Macroeconomics 7th edition, page 81:> 8. Consider how each of the following events is... more
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05/31/19

If an incoming student has High School GPA = 3 and Letters = 8 what would his predicted College GPA be
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05/30/19

What is statistics all about?

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05/30/19

What is the simple definition of statistics?
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05/30/19

Axiomatic approach to the definition of variance?
I'm trying to grasp the intuition behind the definition of variance. It seems plausible that we want to measure how much a random variable deviates from it's expected value. But why using the... more
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05/29/19

expected value using random number generator
a carnival game has the possibility of scoring 50 points, 75, or 150 points per turn. The probability of scoring 50 is 60%, 75 is 30%, and 150 is 10%. The game operator designed a simulation... more
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05/28/19

stats questions help!!
1.) A particular fruit's weights are normally distributed, with a mean of 791 grams and a standard deviation of 8 grams.If you pick one fruit at random, what is the probability that it will weigh... more
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05/28/19

A card is drawn at random in an ordinary pack of 52 playing cards. What's the probability that the card is a club or a diamond?
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05/28/19

probability stat
If E and F are events with P(E)=0.32 and P(F)=0.37, what is P(E or F) if the probability that E and F both happen is 0.12?
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05/28/19

What would be the expected probability of making at least one Type I error when conducting twenty tests?
The full question is: If you ran 20 independent tests on the correlation between dataset1 and each of set A to T using an alpha of 5% what would be the expected familywise error rate? i.e. What... more
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05/27/19

Stat lab help??????
suppose the length of the pregnancies of a certain animal are approximately normally distributed with mean u=250 days and standard deviation o= 12 days. If 100 pregnant individuals were selected... more
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05/27/19

Why does zero correlation not imply independence?
Although independence implies zero correlation, zero correlation does not necessarily imply independence. While I understand the concept, I can't imagine a real world situation with zero... more
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05/26/19

Independent vs. mutually exclusive
Given the following information about events A, B, and C, determine which pairs of events, if any, are independent and which pairs are mutually exclusive. a) P(A)=0.26 ... more
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05/26/19

Two dice thrown, one comes up 6?
If my friend throws two dice, and covers them up, but I see that one of them was a 6, what's the probability that they were both 6s given this knowledge? I'm under the impression that the answer... more
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05/24/19

What is the probability of one more broken part in a system with 25 moving parts of which 7 have already broken and been replaced?
This is a probability math problem. Past a certain number of broken moving parts occurring in a system with 25 moving parts, the probability of one more breaking actually starts to increase, not... more
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05/24/19

An experiment finds that 27% of 103 subjects report improvement after using a new medicine. (read description))
An experiment finds that 27% of 103 subjects report improvement after using a new medicine.A. check conditions and create a 90% confidence interval for the actual cure rateB. Interpret the... more
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05/20/19

Jacob performed an experiment with a weighted die, numbered 1 to 6. He rolled the die 125 times and recorded the results. Complete the table below.
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