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According to a recent survey by the National Retail Federation, men spent an average of $135.35 on Valentine's Day gifts (compared with $72.28 for women). Assume the standard deviation for this populations if $40 and that it is normally distributed. A random sample of 10 men who celebrate Valentine's Day was selected.
a. Calculate the standard error of the meanb. What is the probability that the sample mean will be more than $125?c. What is the probability that the sample mean will be more than $140?d. What is the probability that the sample mean will be between $120 and $160?e. Identify the symmetrical interval that includes 95% of the sample means if the true population mean is $135.35
So decide to exercise by playing at least one game every day. To avoid but very tired , decides not to play more than 12 games a week. Prove that there are a number of consecutive days that will just play 21 games.
A brief summary of the theories of Piaget and Vygotsky. Similarities in the theories of Piaget and Vygotsky
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Prostate cancer are actually proven correct through subsequent biopsy. JBGHI demands a sample large enough to ensure an error of ± 2% with 90% confidence. What is the necessary sample size?
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What is the underlying difference between the T-test and the Z-test? Provide an example of nominal information and write a work related survey question that would collect nominal data:
Calculation of Employees Productivity
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