Microsoft Office Tutorials and References

In Depth Information

Fig. 4.5 Worksheet data for

Chap. 4: practice

problem #1

(a) Write the null hypothesis and the research hypothesis on your spreadsheet.

(b) Use Excel to ﬁnd the sample size, mean, standard deviation, and standard

error of the mean to the right of the data set. Use number format (2 decimal

places) for the mean, standard deviation, and standard error of the mean.

(c) Enter the critical t from the t-table in Appendix E onto your spreadsheet,

and label it.

(d) Use Excel to compute the t-value for these data (use 2 decimal places) and

label it on your spreadsheet.

(e) Type the result on your spreadsheet, and then type the conclusion in plain

English on your spreadsheet.

(f) Save the ﬁle as: PETAL3.

2. Suppose that you wanted to study the mass (in grams) of rainbow trout (On-

corhynchus mykiss) in a river in southern Colorado in the U.S. Five years ago,

the average mass was 112 grams (g). You would like to know if the average

mass has changed since then. You have collected data on a sample of rainbow

trout from the same river, and you want to test your Excel skills on a small

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