Confidence interval for mean penetration resistance
Fifteen measurements, expressed as the multiple of standad quantity, had mean of 2.64 and standard deviation of 1.02. Determine a 95% confidence interval for mean penetration resistance for this soil.
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The following molarities were computed from replicate standardization of a solution: 0.5026, 0.5029, 0.5023, 0.5031, 0.5025, 0.5032, 0.5027, and 0.5026. Within what range are you 95% certain that the true mean value of molarity falls?
You have surveyed 30 people and asked whether they are male (M) or female (F), and how many large personal purchases ($5,000 or more per purchase) they've made in the past 6 months. Your survey results in following raw data:
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