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A chemist titrates 220.0mL of a 0.3139M pyridine C5H5N solution with 0.4370M HNO3 solution at 25°C. Calculate the pH at equivalence. The pKb of pyridine is 8.77 . Round your answer to 2 decimal places. Note for advanced students: you may assume the total volume of the solution equals the initial volume plus the volume of HNO3 solution added.
Draw to scale an ogive of the data represented by the above graph and use it to obtain estimates of the 70th percentile and the mid 75% range - What percentage of the pins will be acceptable to the customer?
What is the 99% confidence interval?
Write a program which simulates both cases for a run of 1000 trials, prints out the proportion of successes for each run, and repeats this process ten times.
A breakdown of the responses is shown in the accompanying table. Is there evidence at the 10% level to infer that the responses differ among the three groups of employees?
Instructions: Perform the 5-step hypothesis testing procedure, HERE ARE THE STEPS THAT NEED TO BE FOLLOWED & THE RAW DATA IS BELOW. Hypothesis Testing Steps given
dr. cardenas studied political attitudes among di erent groups of 20- 40- and 60- year-olds. political attitudes were
Test the null hypothesis that the telephone survey technique has a probability of selecting a household with no children that is equal to the value obtained by the census.
hen investigating a relationship between birth weight and IQ, researchers found that 258 subjects with extremely low birth weights (less than 1000 g) had Wechsler IQ scores at age 8 with a mean of 95.5 and a standard deviation of 16.0.
If quality control inspectors wish to estimate the % cacao to within 1% of the true mean with 95% confidence, how many pieces of chocolate should they sample?
An important issue facing Americans is the large number of medical malpractice lawsuits and the expenses that they generate. In a study of 1228 randomly selected medical malpractice lawsuits
If statistically significant, do you think the difference is large enough to be important?
a manufacturer claims the average life of a product is 500 hours. the lifetime of the product is assumed to follow an
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