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a. The marks on a statistics midterm test are normally distributed with a mean of 78 and a standard deviation of 6.
b.What is the probability that a class of 50 has an average midterm mark that is more than 75?
c.What is the mark of the top 10% students?
In a study of the differentiation process, 26 juvenile animals were reared in smooth plastic trays, 18 were reared in trays containing several oyster chips, and 23 were reared in trays with only one oyster chip.
What are the differences between a two sample t-test and ANOVA hypothesis testing? What is an example of a research idea that would need to be analyzed using an ANOVA?
The most important material reclaimed from beverage bottles is PET plastic. A serious impurity is aluminum, which later can clog the filters in extruders when the recycled material is used.
Prove that a and b are coprime if and only if no prime numbers divides both a and b. Show that [a,m] = m if and only if a divides m
What proportion of sample means would be between 1.31 and 1.33 inches?
A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%.
In a bag there are 20 marbles. The colors of the marbles are as follows: red - 5; blue - 8; green - 3; yellow - 4.
Calculate estimated Cohen's d to measure size of treatment effect.
To cross a single lane of moving traffic, we require at least a duration d. Successive car interarrival times are independently and identically distributed with probability density function fT (t).
Critically discuss the lower control limit for a proportion defective if the average daily production is 5000 units and the average fraction defective is .02?
What are the assumptions of regression analysis and how do you evaluate them?
Decide whether the normal sampling distribution can be used. If it can be used, test the claim about the population proportion p at the given level of significance α using the given sample statistics.
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