Saturday

January 31, 2015

January 31, 2015

Posted by **mysterychicken** on Thursday, June 20, 2013 at 4:53pm.

1. The probability of a car in a population having faulty brakes is .05. If we take a sample of 150 cars, find the standard deviation of the sampling distribution.

2. The strength of ten I-beams produced in a steel mill is an example of a..?

I think it is STATISTIC but I am not sure.

The choices are parameter, statistic, sample, population

3. What can be used in selecting samples and dividing these samples into different treatments?

a. block design

b. random number generators

c. convenience sampling

d. group design

Thankss!

- Math -
**bobpursley**, Friday, June 21, 2013 at 5:31am1. A good estimate for the mean is .05*150=7.5

BEcause this is a Poisson Distribution, standard deviation=sqr 7.5

2. makes no sense to me.

3.I would go with answer b.

**Answer this Question**

**Related Questions**

Stats - Assume we draw a simple random sample from a population having a mean of...

stats - How large a sample should be taken if the population mean is to be ...

math - Can I gt some help on these questions! 1.Research subjects that are ...

Stats - A random sample of two hundred fifteen adults is selected from a certain...

Statistics - Hello, I have a few questions I'm working on for Statistics hw. ...

math statistics - please help me I've waited for hours The average price of a ...

Stats - Time/CNN voter polls monitored public opinion for the presidential ...

Statistics Emergency please - People end up tossing 12% of what they buy at the ...

stats - A normal population has mean 100 and variance 25. How large must the ...

math statistics - The average price of a gallon of unleaded regular gasoline was...