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The Federal Reserve reports that the mean lifespan of a five dollar bill is 4.9 years. Let's suppose that the standard deviation is 1.8 years and that the distribution of lifespans is normal
Find:
(a) the probability that a $5 bill will last less than 6 years.
(b) the probability that a $5 bill will last between 3 and 5 years.
(c) the 98th percentile for the lifespan of these bills (a time such that 98% of bills last less than that time).
(d) the probability that a random sample of 35 bills has a mean length of more than 5.5 years.
The mean score on a standardized psychology test is supposed to be 50. Believing that a group of psychologists will score higher, we test a random sample of 11 psychologists.
Test a hypothesis to see if this proportion has changed since 1985. I have the standard error and a t-score of 1.660. I need the test effect, test statistic and p-values.
Perform a MANOVA. data set perform a MANOVA. "Group" is your fixed factor, and LDL and HDL are your dependent variables - Exploratory Data Analysis.
If a simple random sample of 75 MBA graduates is to be taken. What is the probability that the sample mean salary will exceed $82,500?
find the indicated z score. the graph depict the standard normal distrubiton of blood count scores with mean of 0 and
Using data provided, test if there is a difference between means at alpha =.05.
The random variable x, which is the number of occurrences of an event over an interval of ten minutes. It can be assumed that the probability of an occurrence is the same in any two time periods of an equal length. It is known that the mean number..
find the indicated z score. the graph depicts the standard normal distrubtion with mean 0 and standard deviation 1. the
consider a situation where a die is rolled. which of the following explanations more closely describes the relative
What are three lessons you learned relative to ANOVA and nonparametric tests? As a result of using this simulation, what concepts and analytic tools will you be able to use in your workplace (i.e., how do you expect to apply what you learned)?
for each research situation described below decide what statistical procedure would most likely be used to answer the
Average salary of $27,839 with a standard deviation of $7,400. At the 0.01 significance level, do teachers with Master Degrees have higher salaries?
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