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Problem:
Nickels falling over. You may feel that it is obvious that the probability of a head in tossing a coin is about 1/2 because the coin has two faces. Such opinions are not always correct. Stand a nickel on edge on a hard, flat surface. Pound the surface with your hand so that the nickel falls over.
Required:
1. What is the probability that it falls with heads upward? Make at least 50 trials to estimate the probability of a head.
How many cities have a population of at least 100,000 but less than 1,000,000? What percentage of cities are in this group?
Correlation between the two variables - Evaluate the value of the correlation coefficient.
What is predicted value for National Health Expenditure as a % for 2010? What is the 95% confidence interval for your estimate? Does the trend continue? Does year impact expenditure?
the amount of money college students spend each semester on textbooks is normally distributed with a mean of 195 and a
Based on these data, is it plausible that the proportions of female office workers who often feel abused at work are the same for these countries?
prediction interval for the regression line.using the age and sick days data from table below find the 98 prediction
discover card would like to test the hypothesis that the average credit score for an adult in dallas is different from
the blood pressure measurements of a single patient were taken by twelve different medical student and the results are
Probability of a person being blood type b is 13%. What is the probability that 4 unrelated people in random selection will all be type b?
use the one-proportion z-test to perform an appropriate hypothesis test. be sure to check the conditions for using that
1. Suppose you are given a particular set of data and found that r = 2.5. How would you interpret this result?
Critically discuss the mean number of children per household for these families? Round your answer to at least one decimal place.
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