Mathematics, 08.11.2019 01:31 juliannabartra
In a population, 68% of all tax returns lead to a refund. a random sample of 1000 tax returns is taken. (a)describe the distribution of the number of returns leading to refunds in the sample.(b)what is the expected number of returns leading to refunds in the sample? what is its variance? (c)what is the mean of the sample proportion of returns leading to refunds? (d)what is the variance of the sample proportion? (e)what is the standard error of the sample proportion? (f)what is the probability that the sample proportion exceeds 0.65? (assume clt holds)
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The school that imani goes to is selling tickets to the annual dance competition. on the first day of the ticket sales the school sold 7 adult tickets and 5 child tickets for a total of $96. the school took in $40 on the second day by seling 3 adult tickets . find the price of an adult ticket and the price of a child ticket. solve by using substitution elimination college prep algebra math heres the 2 equations i came up with 7x+5y=96 and 3x+2y= -40 show all workiv be stuck on this.
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In a population, 68% of all tax returns lead to a refund. a random sample of 1000 tax returns is tak...
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