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IQ scores are normally distributed with a mean of 100 and a std dev of 15. If 25 people are randomly selected for an IQ test, find the probably that their mean score is between 95 and 105.
Standard deviation of 0.7 inches. If 21 items is chosen at random, what is the probability that their mean length is less than 10.5 inches.
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level.
Conclude whether the given conditions justify using the methods of this section when testing a claim about a population mean µ.
Avid poker player sees 100 hands a week, 52 weeks a year, for 20 years. What is the probability that she sees a royal straight flush dealt at least once?
A research repot from an independent-measures study states that there are significant differences between treatments, F(2, 54) =3.58, p
Solve the following questions involving fundamental operations on polynomials. Solve the following problems involving applications of polynomials.
A coin was flipped 60 times and came up heads 38 times (a) at the time .10 level of significance is the coin based towards heads? show your decision rule and calculations (b) calculate a p value and interpet.
Find the discrete probability distribution for the random variable X and compute the corresponding mean and standard deviation.
"Give an example of a statistic that you have heard quoted in the media that you do not believe is accurate either due to bias or other incorrect statistical methods. Describe the relevant population and the source (e.g. newspaper, TV, radio, inte..
The critical F value with 6 numerator and 60 denominator degrees of freedom at α = .05 is:
Determine the coefficient of determination (Use Megastat or Excel, Tools, Data Analysis, Regression function). Interpret the result.
Federal administration stated that unemployment level in US is 8.6% (population proportion = 0.086). A hypothesis test is to be performed to decide whether unemployment level in NY State differs from national level.
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