The weekly demand for a product is believed to be normally distributed. Compute the degrees of freedom. Use ?=0.10. The sample mean is 24.5 and the sample standard deviation is 3.
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18
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20
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22
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27
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22
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25
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22
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27
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25
|
24
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|
26
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23
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20
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24
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26
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27
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25
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19
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21
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25
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26
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25
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31
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29
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25
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|
25
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28
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26
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28
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24
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