# 1. A random sample of 10 miniature Tootsie Rolls was taken …

1. A random sample of 10   miniature Tootsie Rolls was taken from a bag. Each piece was weighed on a   very accurate scale. The results in grams were:   3.087,   3.131, 3.241, 3.241, 3.270, 3.353, 3.400, 3.411, 3.437, 3.477                              (a)   Construct a 90 percent confidence interval for the true mean weight.

2. Using this   frequency distribution, answer this question using an insert into a comment   box into a cell in your excel file. Find comment in your Excel menu under ‘insert’. (Or send a Word   file for this question.) Question: Describe how   the number 20 was determined for this frequency distribution? What does it really mean? What is the n value for this frequency   distribution?                         Age Frequency             18-20 4             21-23 8             24-26 11             27-29 20             30-32 7

3. What level of data is   shown here? (hint, by level, I am looking for Nominal, Ordinal, Interval, or   Ratio as an answer).                 Raw data   collected at a NASCAR speed track for the average speed of these cars.                       Day 1 Trial Day 2 Trial             220 222             219.8 215.6           221 229.8             222 235.4             210.9 198.7             222.7 250.2

4. Below are two data   sets. Using descriptive statistics,   discuss the two data sets in relation to each other. I am looking for calculations and a written   analysis.. Both data sets come from an   operation where potato chips are being placed in small connivance store bags   that are to hold 6.0 oz. Note, both   calculations and text response is required. You may insert into a comment box into a cell in your excel file. Find comment in your Excel menu under   ‘insert’. (Or send a Word file for this question.)

Data from   Machine #1 Data from Machine   #2   6.1 6.4   5.9 5.6   6.1 6.1   5.8 5.8   6.2 6.7   5.9 5.4   6 6   6 6.4   6.3 6.4   6 6   5.8 5   5.9 5.2   6.1 4.9   6.3 4.8

5. Calculate the   confidence interval for this problem.
A sample of 64 observations is taken from a normal population. The sample mean is 55, and the sample   standard deviation is 10. Determine   the 95% confidence interval for the population mean.

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