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1. Consider the random variable X with the probability mass function p(i)=e-22i/i!
What is P{X=0}?
2. Consider a fair coin. We define the random variable X=0 if the outcome is tail and X=1 if the outcome is head.
What is FX(0)? In other words, what is the CDF at X=0?
3. Consider a fair coin. We define the random variable X=0 if the outcome is tail and X=1 if the outcome is head.
What is FX(1/2)? In other words, what is the CDF at X=1/2?
4. Consider a fair coin. We define the random variable X=0 if the outcome is tail and X=1 if the outcome is head.
What is E[X]?
10 parts produced by this machine are randomly selected, what is the probability that more than 2 turn out to be defective? Round your answer to four decimal places.
A production process produces 90% non-defective parts. A sample of 10 parts from the production process is selected. What is the probability that the sample will contain 7 non-defective parts?
You take a random sample of pizzas sold during a one hour period over the next week. Group 1 and Group 2 The results are shown in the table to the at the bottom of this. Does the ad campaign make a difference? Can you suggest a different methodology ..
Problems on Sampling Variability and Standard Error and Confidence Intervals
Their average age was 19.1 years with a standard deviation of 1.5 years. What is the best point estimate for the population mean?
Find the z-score for a car driving 20 mph in this construction zone. It is an outlier (assume the data is bell shaped, so dont actually test it with pearsons index).
currently available medication is -9.4 minutes with a standard deviation of 2.8 minutes. Construct a 95% CI for the mean difference in times between the experimental and currently available medication.
Determine the value of test statistic z using z = ^p-P ^pq/n. Claim is that proportion of drowning deaths of children attributable to beaches is more than 0.25, and sample statistics.
3 section of a statistics class containing 28,32 and 35 students averaged 83,80 and 76 respectively on same final exam. what 's the combined population means of all the 3 sections ?
Ball bearings are mannormally distributed with a meanufactured with a diameter of 5 mm. But the process has variation, so the diameter is normally distributed with a mean of 5 mm and a standard deviation of .02 mm. A) What proportion of ball beari..
Suppose that 55 percent of the people in a population of 500,000 support your candidate. If you conduct a poll of 1,000 people, what is the interval that has a 95 percent chance of containing the results of your poll?
Ethics. The one-time fling! Have you ever purchased an article of clothing (dress, sports, jackets, etc.) worn the item once to a party, then returned the purchase?
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