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The following data are ordered systolic blood pressures in millimeters of mercury (mmHg) from 48 young adult males:
(a) Compute the mean and standard deviation using the formulas given in this book. Check your results by entering the data into a statistical package and obtain their results for the means and standard deviations.
(b) Compute the median and quartiles.
(c) Display a histogram and a box plot of the data above using a statistical package. Check if your median and quartiles coincide with the box plot obtained from a statistical package.
(d) State whether or not you think the data follow a symmetric distribution, and give the reason for your answer.
(e) Which observations might you check to see if they were outliers?
How many different sets of exactly 20 of the 23 people with reservations for coach seats are possible? (do you use permutations or combinations?)
You suspect that this claim is too high and decide to test the claim. You select a random sample of 75 incoming freshman and find the mean SAT math score to be 645. If you assume that the population mean is 650, find the standardized test statisti..
twelve different video games showing substance use were observed and the duration times of game play in seconds are
a random sample of 16 csn students is taken. the average age in the sample was 27 years with a standard deviation of 4
We denote by N(t) the number of failures of a machine in the interval [0, t]. We suppose that N(0) = 0 and that the time τ0 until the first failure has a uniform distribution on the interval (0,1].
there are thirty-five 35 members in the kalamazoo travel club. four 4 people will be chosen to win a vacation.how many
Use an appropriate test to determine if the reason for component failures is independent of their designs. Show your manual calculations here.
Using the results from Problem 2, draw the cumulative frequency in percent. What percent of the observations are below 240 mg/mL using this display?
An election will be held next week and, by polling a sample of the voting population, we are trying to predict whether the Republican or Democratic candidate will prevail.
All standard IQ test scores are normally distributed and are set up so that the mean score is 100. However, the standard deviation differs from test to test.
random variable x denotes the number of daughters in a family of 2 children. the probability of having one daughter is
Assume that the number of left-handers is a binomial random variable. (Refer to the formula for mean and standard deviation for binomial prob. Distribution)
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