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Data
Answer sheet
Round all calculations to at least 4 decimal places.
Briefly explain :
Solution
if sigma is unkowm we will use T distribution tables
if sigma is know we will use Z distribution table
1) confidence interval
alpha = 0.10 alpha/2 = 0.05
df = 41
critcal values : +/-1.684
2)
alpha = 0.01
df = 43
critical value : -2.423
3)
2 tailed test
alpha / 2= 0.025
df = 8
critical values : +/-2.306
4) confidence interval
alpha / 2 = 0.05
critical values : +/- 1.64
5) lower tailed
alpha = 0.01
critical value -2.32
6) upper tailed
alpha = 0.05
critical value : +1.64

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DataAnswer sheetRound all calculations to at least 4.pdf

  • 1. Data Answer sheet Round all calculations to at least 4 decimal places. Briefly explain : Solution if sigma is unkowm we will use T distribution tables if sigma is know we will use Z distribution table 1) confidence interval alpha = 0.10 alpha/2 = 0.05 df = 41 critcal values : +/-1.684 2) alpha = 0.01 df = 43 critical value : -2.423 3) 2 tailed test alpha / 2= 0.025 df = 8 critical values : +/-2.306 4) confidence interval alpha / 2 = 0.05 critical values : +/- 1.64 5) lower tailed alpha = 0.01 critical value -2.32 6) upper tailed
  • 2. alpha = 0.05 critical value : +1.64