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Suppose that 30% of a group of people have hazel eyes. Assume that passengers boarding the plane form a randomly chosen group.
What is the probability that passenger 17 is the 3th one having hazel eyes.
a national magazine claims that the average college student watches less tv than the general public. the national
1.a recent study investigated the extent to which hypertension is affected by alcohol consumption. among other things
The number of customers at a specialty meat store averages about 1500/day. The exact number varies from day to day. On Fridays before long weekends, the number of customers increases to about 3000. Which of the following statements is correct
the state test scores for 12 randomly selected high school seniors are shown on the right. assume the population is
When would you use hypothesis testing and when would you use confidence intervals?
brian smith sells a set of movie posters 12 and baseball cards 8 at a local flea market. on last sunday brians total
Develop a 95% confidence interval estimate of the mean amount spent per day by a family of four visiting Niagara Falls (to 2 decimals).
In a 1993 survey of 560 college students, 171 said that they used illegal drugs during the previous year. In a recent survey of 720 college students, 263 said that they used illegal drugs during previous year.
He surveys several businesses and finds the standard deviation in monthly advertising costs is $23 for 12 hair salons, and $43 for 8 nail salons.
in the following problem check that it is appropriate to use the normal approximation to the binomial. then use the
The wheat harvesting season is short. Farmers deliver their truck loads of wheat to a giant central storage bin within a two-week span. Because of this, wheat-filled trucks waiting to unload and return to the fields have been known to back up for ..
Airlines monitor the causes of flights arriving late. 75% of flights are late because of weather, 35% of flights are late because of ground operations. 10% of flights are late because of weather and ground operations.
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