Mathematics, 22.10.2021 21:40 cocaineal
A random sample of 20 purchases showed the amounts in the table (in $). The mean is $49.44 and the standard deviation is $21.38. a) Construct a 99% confidence interval for the mean purchases of all customers, assuming that the assumptions and conditions for the confidence interval have been met. b) How large is the margin of error? c) How would the confidence interval change if you had assumed that the population standard deviation was known to be $22?
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Mathematics, 21.06.2019 20:20, redbeast677
The polynomial 10x3 + 35x2 - 4x - 14 is factored by grouping. 10x3 + 35x2 - 4x - 14 5x )-20 what is the common factor that is missing from both sets of parentheses?
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Mathematics, 21.06.2019 22:30, bradenhale2001
I’m really confused and need your assist me with this question i’ve never been taught
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