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How can you tell when you should use the ANOVA versus a t-test? What is one problem with using the ANOVA when the t-test is the appropriate data analysis?
Assign probabilities to the sample points and then find the probability that the first envelope purchased contains less than $100.
Estimate the indicated probability by using the normal distribution as an approximation to the binomial distribution.
Make a relative frequency histogram by using ten-point intervals to show the distribution of the scores.
The random variable x has a normal distribution with mean=30 and standard deviation=30, find the probability that x assumes a value more than two standard deviations from its mean. more than three standard deviations from the mean.
Describe expected value (EV) of an investment if there is a 20% chance of realizing a return of $20,000 or a 55% chance of realizing a return of $25,000, or there could be a loss of $15,000?
Use a scatter plot to determine the relationship between the x values and the y values.
Explain distribution of sample means (shape , Expected value , and standard error ) for samples of n=36 selected from population with a mean of m =100 and standard deviation of s=12.
A sample of students attending Southeast Florida University is asked the number of social activities in which they participated last week. The chart below was prepared from the sample data.
Calculate the mean number and median number of apples in a bag.
What is the probability that among 10 true hypertensives at least 50% are being treated appropriately and are complying with this treatment?
How does a t test differ from a z test in terms of when it is used, how it is calculated, and how we determine significance?
In a test of a gender-selection method, 14 babies are born and 10 of them are girls. Find the number of different possible sequences of genders that are possible when 14 babies are born
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