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Suppose that 55% of all people prefer Coke to Pepsi. We randomly choose 500 people and ask them if they prefer Coke to Pepsi.
What is the probability that our survey will (erroneously) indicate that Pepsi is preferred by more people than Coke?
Does this probability increase or decrease as we take larger and larger samples? Why?
How many treatments are there? What is the total sample size? Is there a significant difference at the 5% Level of significance?
mike dreskin manages a large los angeles movie theater complex called cinema l ll lll lv. each of the four auditoriums
1.i want to know which of two manufacturing methods will be better. i create 10 prototypes using the first process and
If four days have passed without a breakdown, what is the probability that it will break down on the ?fth day? What is the probability that ?ve consecutive days will pass without any breakdown?
A gardener grow 20 of these plants and was pleasantly suprised to see 5 blue flowers, 10 red, 2 white and 2 pink. Calculated the probability of this event.
a random sample of 10 parking meters in a beach community showed the following incomes for a day. assume the incomes
The mean monthly expenditure on gasoline per household in Middletown is determined by selecting a random sample of 36 households. The sample mean is $68 with a random sample standard deviation of $17.?Calculate a 90% confidence interval for the me..
Find the mean, median, mode, and midrange for these data.
a national sample of 2728 adults aged 18 and older surveyed over the telephone using bother landlines and cell phones
1 a contractor has produced the first unit of a laser targeting device at a cost of 45k. historically their learning
At 95% confidence using the critical value approach, test to see if the percentage of defective systems produced by X-Game has exceeded the industry standard.
What is the probability that a bag of fertilizer will weigh between 38 and 50 pounds?
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