• Oct 4th 2008, 08:43 PM
asdfg
I have never learned stat and i was asked to do all these without learning anything... - -;;

Calculate:
(a) 23.043 ± 4.321
(b) 67 ± 9.023
(c) 33.1492934 ± 2
a = 40 ± 5
b = 30 ± 3
c = 20 ± 1
t = 1.2 ± 0.1
Calculate a + b, a + b + c, a / t, and (a + c) / t.

Calculate (1.23 ± 0.03) +pi . (pi is the irrational number 3.14159265…)

Calculate (1.23 ± 0.03) × pi

You are determining the period of oscillation of a pendulum. One procedure would be to measure the time for 20 oscillations, t20, and repeat the measurement 5 times. Another procedure would be to measure the time for 5 oscillations, t5, and repeat the measurement 20 times. Assume, reasonably,that the error in the determination of the time for 20 oscillations is the same as the error in the determination of the time for 5 oscillations. Calculate the error in the period for both procedures to determine which will give the smallest error in the value of the period?

What is the probability of rolling a seven 10 times in a row?

Amazingly, you have rolled a seven 9 times in a row. What is the probability that you will get a seven on the next roll?
Y
ou have a large dataset that is normally distributed. If you choose one data point at random from the dataset, what is the probability that it will lie within one standard deviation of the
mean?
• Oct 5th 2008, 03:17 AM
CaptainBlack
Quote:

Originally Posted by asdfg
I have never learned stat and i was asked to do all these without learning anything... - -;;

Calculate:
(a) 23.043 ± 4.321
(b) 67 ± 9.023
(c) 33.1492934 ± 2
a = 40 ± 5
b = 30 ± 3
c = 20 ± 1
t = 1.2 ± 0.1
Calculate a + b, a + b + c, a / t, and (a + c) / t.

Calculate (1.23 ± 0.03) +pi . (pi is the irrational number 3.14159265…)

Calculate (1.23 ± 0.03) × pi

These are not stats, just interval arithmetic a ± b means the interval a-b to a+b.

RonL
• Oct 5th 2008, 03:19 AM
CaptainBlack
Quote:

Originally Posted by asdfg
I have never learned stat and i was asked to do all these without learning anything... - -;;

Calculate:
(a) 23.043 ± 4.321
(b) 67 ± 9.023
(c) 33.1492934 ± 2
a = 40 ± 5
b = 30 ± 3
c = 20 ± 1
t = 1.2 ± 0.1
Calculate a + b, a + b + c, a / t, and (a + c) / t.

Calculate (1.23 ± 0.03) +pi . (pi is the irrational number 3.14159265…)

Calculate (1.23 ± 0.03) × pi

You are determining the period of oscillation of a pendulum. One procedure would be to measure the time for 20 oscillations, t20, and repeat the measurement 5 times. Another procedure would be to measure the time for 5 oscillations, t5, and repeat the measurement 20 times. Assume, reasonably,that the error in the determination of the time for 20 oscillations is the same as the error in the determination of the time for 5 oscillations. Calculate the error in the period for both procedures to determine which will give the smallest error in the value of the period?

What is the probability of rolling a seven 10 times in a row?

Amazingly, you have rolled a seven 9 times in a row. What is the probability that you will get a seven on the next roll?
Y
ou have a large dataset that is normally distributed. If you choose one data point at random from the dataset, what is the probability that it will lie within one standard deviation of the
mean?

This looks like a pre-course test to determine what you already know, in which case we should not help you with them, its better that your teacher knows what you do and do-not know.

RonL