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The 30 members of an orchestra were asked how many instruments each could play. The results are set out in the frequency distribution. Calculate the mean number of instruments played:
Number of instruments, x 1 2 3 4 5Frequency, f 11 10 5 3 1
If random sample of thirty six customer transactions points out that sample mean withdrawal amount is $172, is there evidence to think that population mean withdrawal amount is no longer $160? Determine the mean of data above?
A random sample of seven cars was selected; the cars were driven for two weeks without the booster and two weeks with the booster.
Employer wishes to interview only those applicants who score in top 15%. What must cut-off score be for interviews?
How much variability will you have if you predict sales with this model?
Explain why we need to use the t distribution. What assumption do you need to make?
The diameters of bolts produced by a certain machine are normally distributed with a mean of 0.30 Inches and a standard deviation of 0.01 inches.
An educational study utilizes a simple pre post design to assess the efficacy of a computer tutor for solving inequalities.
To test there is significant difference among the mean of income using ANOVA. A developer of real estate is considering investing in a shopping mall on the outskirts of Atlanta, Georgia.
Find out how to minimize cost of meeting demands in Houston and Tampa.
Is there a relationship between sales and newspaper?
What is the probability of randomly selecting a male from this group?
It took a contractor 5000 hours to manufacture their first unit of an item. If the contractor expects to achieve a 94% unit learning curve, how many hours would be required to manufacture units 76-100?
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