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The scores on a certain test are normally distributed with a mean score of 45 and a standard deviation of 3. What is the probability that a sample of 90 students will have a mean score of at least 45.3162?
You're trying to explain null and alternative hypotheses to one of the senior managers at Company W and he's not "getting it" when you use snack food sales.
An instructor in a Statistics course teaches in two classes: Class A and Class B. Class A has 16 students while class B has 25 students. On the same examination, although there was no significant difference in the mean grades, class A had a standa..
What is the probability that the number of granite selected for analysis is within 1 standard deviation of it means value.
Determine whether P constitutes a Bayesian network with the DAG X -> Y -> Z: Determine whether P constitutes a Bayesian network with the DAG X -> Z
I read that a range of expression is a set of values of a given expression. This set may consist of the whole set of cardinals numbers xy or of a proper subject of the set of cardinals (as the expression 2x, whose range is the even cardinals).
The average age of the students in the sample was 23 with a standard deviation of 3.5: a) Formulate the hypotheses for this problem.
Use the Internet to find a website that shows an example or application correlation or regression in the area of your interest or in your profession. Discuss how correlation or regression was used and summarize your finding.
Derive the standard error of proportion, the margin error and the 95% confidence interval for the proportion indicating preference to flirting.
When testing for a difference between the means of a treatment and a placebo group, the computer display below is obtained. using a 0.05 significance level, is there sufficient evidence to support the claim that the treatment group (variable 1) co..
Compute a 3-month moving average forecast of demand for April through January (of the next year).
It is used when it doesn't make sense to look at the mean of such variables. Explain analysis of variance, multivariate statistics, and non-parametric methods.
If the following expression (5t+5)/(2t+5) is to make sense, the values that t can take must be restricted. State the restriction on it.
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