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Market research analyst suspects that average monthly household expenditure for long distance telephone service in City A exceeds average monthly household expenditure for long distance telephone service in City B by more than $20. Market research analyst thinks that monthly household expenditures for long distance telephone service are normally distributed both in City A and City B, and that two population variances are equal. Market research analyst took random sample of 12 City A households and random sample of 15 City B households and recorded following information regarding their monthly expenditures for long distance telephone service.
City A Mean = 843City B Mean = 54City A Std. Dev. = 18City B Std. Dev. = 12City A Sample Size = 12City B Sample Size = 15
If 99% confidence interval for mean difference between average monthly household expenditure for long distance telephone service in City A and average monthly expenditure in City B extends from X to Y, determine the value of X?
The number of passengers on the Carnival Sensation during one-week cruises in the Caribbean follows the normal distribution.
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A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.
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