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For the data in the following sample:
8, 1, 5, 1, 5
a. Find the mean and the standard deviation.
b. Now change the score of X 8 to X 18, and find the new mean and standard deviation.
c. Describe how one extreme score influences the mean and standard deviation.
Girls are needed to ensure that a 95% confidence interval estimate for the differncein mean BMI between boys and girls has a margin of error not exceeding 2 units?
Use appropriate Excel functions to solve the following questions: Compute the probability of receiving four calls in a five-minute interval of time.
Consider a hypothesis test that uses a 0.05 significance level to test the claim that the mean body tem of the population is less than 98.6
Yyielding a $20,000 profit, and a 30% chance that the building will sell for $230,000, yielding a $70,000 profit. What is the expected profit? = E( X - ) = ( xi - What is Var(X)?
How many city residents must be surveyed in order to have a 95 percent with a precision of plus/minus 3 trips per month.
Not take SRS of 25 students who took test. What are the mean and standard deviation of sample mean score xbar of these 25 students?
At the level of significance, is there evidence that the population mean force is greater than 1500 pounds?
instead of rolling a die 100 times use statcrunch to simulate 100 rolls of a die. use statcrunch to create a random
The mean value of her net gain/loss will again be $2000? What if she repeats the experiment 10 times? Respond to at least two of your classmates' postings.
Let m denote a natural number. Use any properties of the natural numbers to argue that m x m is not equal to m + m.
a seven-year medical research study reported that women whose mothers took the drug diethylstilbestrol des during
Draw a tree diagram representing this experiment. Use this tree diagram to find the probabilities below.
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