Homework chapter 8 (1-15)
– Table 1 : z table
– Table 2: df table
1.
| A simple random sample of 25 observations is derived from a normally distributed population with a known standard deviation of 8.2. Use Table 1. |
| a. | Is the condition that |
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| b. | Compute the margin of error with 80% confidence. (Round intermediate calculations to 4 decimal places, “z” value and final answer to 2 decimal places.) |
| Margin of error | PRIVATE “<INPUT TYPE=”text” SIZE=”7” NAME=”Q_13252699393847617_ans2” VALUE=””>” MACROBUTTON HTMLDirect |
| c. | Compute the margin of error with 90% confidence. (Round intermediate calculations to 4 decimal places, “z” value and final answer to 2 decimal places.) |
| Margin of error | PRIVATE “<INPUT TYPE=”text” SIZE=”7” NAME=”Q_13252699393847617_ans3” VALUE=””>” MACROBUTTON HTMLDirect |
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