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Posted above is an article that includes some interesting and thought-provoking statistics. Personally, I find many of these quite fascinating (I hope you do too!). What are your thoughts regarding these? What statistical methods do you think were used to obtain this information and tabulate the data? Which one surprised you the most or were you most intrigued by? Feel free to add any of your own interesting statistics that you may know or have found!
What is the 95% confidence interval for the standard deviation of birth weights at County General Hospital, if the standard deviation of the last 25 babies born there was 1.1 pounds.
The Computer Systems Department has eight faculty, six of whom are tenured. Dr. Vonder, the chair, wants to establish a committee of three department faculty members to review the curriculum. If she selects the committee at random:
Make a List of type of possible errors. Assume that you were interested in knowing the mean score for a certain quiz in a statistics class.
Because of safety issues, we are more concerned about underestimating PCB in a specimen than about overestimating. Give the specimen number for each of the two suspected outliers. Which one corresponds to an overestimate of PCB?
Identify the independent variables in the experiment.- Write a model relating the mean milk production, E(y), to the independent variables. Identify and code all dummy variables.
A July 2009 Pew Research Center survey asked a variety of science questions of independent random samples of scientists and the public at-large.
Find the expected frequency to test the claim that walking and low, moderate, and high blood pressure are not related. Round to the nearest tenth if necessary.
consider the following.a the empirical rule indicates that we can expect to find approximately what percentage of the
If the player really can hit 80% now, and it takes at least 9 out of 10 successful shots to convince the coach, what's the power of the test?
A dish contains 20 gumballs - 9 blue, 6 red and 5 white. We randomly select two gumballs from the dish without replacement. a) Let X be the number of blue gumballs selected. Complete the probability distribution of X by filling in the appropriate p..
Making use of the fact that the chi-square distribution can be approximated with a normal distribution when ν, the number of degrees of freedom, is large, show that for large samples from normal populations is an approximate critical region of siz..
What are the two main types of probability?- What is an event? What is the union of two events? What is the intersection of two events?
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