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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?
there are four cards in a pocket and each of them is marked with 3 numbers. these numbers are 110 101 011 and 000. you
Construct a contingency table or a Venn diagram to evaluate the probabilities of a warranty-related repair. What is the probability that a new car selected at random
She wants to be 90% confident and be accurate within 5% of the true proportion. Find out the minimum sample size necessary.
For each of the three factors (smoking, alcohol, and body mass index), rearrange the data into a 3 x 2 table; the other column is for those without gallstones.
1. a quiz has 5 multiple-choice questions where each question has 4 possible answers but only 1 is the correct
The dimension is supposed to be 224 mm and the variability of the manufacturing process is unknown. Is there evidence that the mean dimension is not 224 mm?
A local Junior High principal has decided to give an award to any student who scores in the top 15% of statewide scores. How high should a student score be to win this award?
Does this data provide evidence at the .05 significance level that there is a difference in the proportion of humorous ads in British versus American trade magazines? Please show work.
At the .05 significance level, can she conclude that there is a difference in the mean amount of weight loss among the three diets?
advertisements for an instructional video claim that the techniques will improve the ability of little league pitchers
If the weekly average expenditure of all households is $53,000 but an expert argues that the weekly expenditure is more than $53,000, test his claim at a 5% level of significance and interpret your results.
What percent of batteries have a life span that is more than 2275 hours? Would it be unusual for a battery to have a life span that is more than 2275 hours? Explain your reasoning.
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