Question about Texas Instruments TI-30XA Calculator

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Finding standard deviation of samples!!

Here are the shopping times in minutes for a sample of 6 shoppers at a shoe store:
34,39,32,36,30,33

find the standard deviation of this sample, please show steps on how to figure out standard deviation step.

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34 σ+
39 σ+
32 σ+
36 σ+
30 σ+
33 σ+
2nd ÷ (σxn)

Posted on Jun 22, 2009

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I have DCA analyzer from Siemens healthcare and i have problem E24 ,How Can Solve it


Manual is available in PDF format from here

http://docslide.us/download/link/dca-operators-guide


http://docslide.us/download/document/?id=%2FJKJQj2KkZIjS9Tn4Jm5CAbRibVv%2BGl%2BT9wi7I03ZyGSjZf8c1bXQnPy2%2FSc3BFIu8t3mvccp4VXj23OQyX8pQ%3D%3D

DCA Vantage Operator's Guide 109
Troubleshooting
E22 - Optical
reading is out
of range
A Sample or Reference
channel reading taken
during an Air
measurement is too
high.
1. Discard the sample.
2. Run an optical test.
3. If you are unable to run an
optical test, contact your local
technical support provider.
E23 -
Excessive
noise on the
Sample
channel
The standard deviation
of the 16 readings at the
Sample channel for Dark
or Air reading is too
large.
1. Discard the sample.
2. Run an optical test.
3. If you are unable to run an
optical test, contact your local
technical support provider.
E24 -
Excessive
noise on the
Reference
channel
The standard deviation
of the 16 readings at the
Reference channel for
Dark, Air or Sample
reading is too large.
1. Discard the sample.
2. Run an optical test.
3. If you are unable to run an
optical test, contact your local
technical support provider.
E26 -
Excessive
noise in sample
reading
The standard deviation
of the 16 readings at the
Sample channel during a
reading taken is too
large in Sample read
position.
1. Discard the sample.
2. Run an optical test.
3. If you are unable to run an
optical test, contact your local
technical support provider.
E27 -
Excessive
Lamp Drift
The change in mean
signal between
successive Air readings
is too large at either the
Sample channel or the
Reference channel.
1. Discard the sample.
2. Run an optical test.
3. If you are unable to run an
optical test, contact your local
technical support provider.
E30 - Thermal
control system
error - low
The temperature
measured by one of the
cartridge holder
thermistors is ?2?C.
1. Discard the sample.
2. Restart the system.
3. If you are unable to perform a
successful restart, contact
your local technical support
provider.
E

Sep 21, 2015 | Siemens Dishwashers

1 Answer

Deviation standard


For a sample this smaller size there are two std deviations. Sample std deviation s(n-1) = 0.550, and population std deviation s(n) = 0.541

Dec 22, 2013 | Audio Players & Recorders

1 Answer

How to get sample size


Count the number of items in the sample whose statistics you're calculating. For example, if you're calculating the mean and standard deviation of seven items then the sample size is seven.

Apr 18, 2012 | Casio FX-9750GPlus Calculator

1 Answer

How do I put my calculator in statistics mode?


The TI-30XA does not have to be switched to a statistics mode, the operations are available all the time. The choice of operations are somewhat limited; the calculator offers statistics functions for one dimensional data sets only (no linear interpolation of (x,y) value pairs, for example):
  • [2nd] [CSR] - erase statistics data
  • [mib8888_17.gif] - add a number to the sample set
  • [2nd] [mib8888_18.gif] - remove a number from the sample set
  • [2nd] [FRQ] - multiple entry of the same sample value
  • [2nd] [n] - sample set size
  • [2nd] [mib8888_19.gif] - sum of all sample elements
  • [2nd] [mib8888_20.gif] - sum of the squares of all sample elements
  • [2nd] [mib8888_21.gif] - average of the sample set
  • [2nd] [mib8888_22.gif] - standard deviation (sample set is a complete set)
  • [2nd] [mib8888_23.gif] - standard deviation (sample set is a subset of a larger set)
The calculator displays "STAT" if the current sample set is non-empty.

Example: calculate the average and standard deviation of the set { 3, 4, 5, 5, 5, 5, 6 }.
  1. [2nd] [CSR] - erase stat memory
  2. 3 [mib8888_17.gif] 4 [mib8888_17.gif] 5 [2nd] [FRQ] 4 [mib8888_17.gif] 6 [mib8888_17.gif] - enter the data, note the use of [2nd] [FRQ] to enter the four occurrences of "5". Entering 5 [mib8888_17.gif] four times would have done the same.
  3. [2nd] [mib8888_21.gif] - display the average of the set, (4.714...)
  4. [2nd] [mib8888_22.gif] - display the standard deviation of the set (0.8806...)

Jan 25, 2011 | Texas Instruments TI-30XA Calculator

1 Answer

How to i do std deviation and sample mean


Example: Enter the following x variables, and determine the sample and population standard deviations.
x = {1,2,3}
  • Press [DATA] and begin to enter the data as indicated into the L1, L2 or L3 lists. To input a data point, type the value and press [ENTER]. Press the down arrow key to move on to the next data point.
  • Press [2nd], [STAT], and then choose 1-VAR.
  • For the "DATA" option, choose the listname the data is stored in (L1, L2 or L3). For the "FRQ" option, choose "ONE" since this data does not include a frequency list.
  • Arrow down to "CALC" and press [ENTER].

    Answers should be as follows:
    3:Sx (Sample Standard Deviation) = 1
    4:sx (Population Standard Deviation) = 0.816497
  • Press [2nd] [MODE] to exit STAT mode.

Oct 20, 2010 | Texas Instruments TI30XS Scientific...

1 Answer

Does this calculator comes with a standard deviation or population standard deviation button


Yes. The sample standard deviation is 2nd [sigma x n-1] and the population standard deviation is 2nd [sigma x n].

Apr 02, 2010 | Texas Instruments TI-30XA Calculator

2 Answers

Standard Deviation


Hello,
If you want to do statistics with this calculator you press [MODE][3:STAT]. You have then 8 options 1:1-var, 2:A+BX, etc.
For one variable statistics you press 1. Enter the values for the X variable in the template. Once finished you press [SHIFT][1](STAT) then select the value you want ( n, x bar , and the standard deviations (X sigma n) and (X sigma n-1).
Hope it helps.

Jul 30, 2009 | Casio fx-300ES Calculator

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