Mathematics, 06.03.2020 23:48 NewKidnewlessons
According to an IRS study, it takes a mean of 330 minutes for taxpayers to prepare, copy, and electronically file a 1040 tax form. This distribution of times follows the normal distribution and the standard deviation is 80 minutes. A consumer watchdog agency selects a random sample of 40 taxpayers.
1. What is the standard error of the mean in this example?2. What is the likelihood the sample mean is greater than 320 minutes?3. What is the likelihood the sample mean is between 320 and 350 minutes?4. What is the likelihood the sample mean is greater than 350 minutes?
Answers: 2
Mathematics, 21.06.2019 20:30
Evaluate the expression for the given value of the variable. | ? 4 b ? 8 | + ? ? ? 1 ? b 2 ? ? + 2 b 3 -4b-8+-1-b2+2b3 ; b = ? 2 b=-2
Answers: 2
Mathematics, 21.06.2019 21:00
Choose the equation that represents the graph below: (1 point) graph of a line passing through points negative 3 comma 0 and 0 comma 3 y = x − 3 y = −x + 3 y = −x − 3 y = x + 3 will award !
Answers: 3
According to an IRS study, it takes a mean of 330 minutes for taxpayers to prepare, copy, and electr...
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