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Desrcribe situations where a normal distribution provides a good approximatioon of the sampling distribution of the mean?
Assume that standard deviation is $3,204 and that 36 four-year institutions are arbitarily selected. Determine the probability that sample mean cost for these 36 schools is less than $25,000.
A survey of 600 non-fatal accidents showed that 111 involved the use of a cell phone. Find a point estimate for p, the population proportion of accidents that involved the use of a cell phone.
Use of linear regression is a critical tool for a managers decision-making ability - Using a level of significance of .01, is there evidence that the out of state students may be receiving lower grades? Fully explain your answer.
A sample of 64 account balances from a credit card company showed an average balance of $1,040. A previously determined population standard deviation is $200.
Madison Metals recently reported $9,000 of sales, $6,000 of operating costs other than depreciation, and $1,500 of depreciation. The company had no amortization charges and no non-operating income.
A random sample of size 25 is taken from a normal population having a mean of 80 and a standard deviation of 5. A second random sample of size 36 is taken from a different normal population having a mean of 75 and a standard deviation of 3.
Let X equal the number of "ones" if a fair dice is tossed two independent times by someone out in the hall. If X=x that person gives the player a bowl consisting of 10-3x red chips and 3x white chips.
Find the mean number of radioactive atoms lost through decay in a day. Find the probability that on a given day, 50 radioactive atoms decayed.
question 1. select any two qualitative data of your survey. from your qualitative data carry out at least two
in a bumper test three types of autos were deliberately crashed into a barrier at 5 mph and the resulting damage in
Car A is known to have a maximum deceleration of 9.35 m/s2. How fast must car A have been going before its brakes were applied? Answer 97.5 km/h (27.1 m/s).
Estimated proportion is within 2.5 percentage points of the true proportion. A previous poll suggests that the proportion is 85%. How large must your sample be?
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