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The American Airlines flights would like to study the departure delay time. They would like to test the claim that the mean departure delay time for all flights from New York to Los Angeles is less than 12 min. They recorded 64 different departure delay times and found the mean is 10 min and the standard deviation is 30 min. Use a 0.01 significance level to test the claim.
3. what is the degree of freedom?
Question 9 options:
30
64
63
8
A study revealed that the probability a judge acquitting a randomly chosen defendant was 0.17 while the probability that a jury would acquit a randomly chosen defendant was 0.33. Further, the probability that both a judge and a jury would have ..
Binge drinking and alcohol-related behaviours amongst Pacific youth: a national survey of secondary school students
if mouse weights are normally distributed with a mean weight of 23 and SD of 4. With 10 mice per box, what weight should they use so that no more than 8% of the boxes will have an average mouse weight below that weight?
Quarterly billing for water usage is shown below.
question 1a marine biologist has evidence from other studies that the number of fish is declining in certain lakes
a new program is developed to enrich thekindergarteneperience of children in prepararion doe first grade. hillmont
What are the assumptions made in performing the hypothesis test in Question 3? Are these assumptions reasonable? Provide explanation to substantiate your view.
Find the minimum sample size required to estimate a population mean m from an underlying normal distribution. Margin of error: 5; confidence level: 95%; σ = 20. Round your answer up to the nearest integer
Find the probability of getting five successes out of the eight trials.
Jane Peterson has taken Amtrak to travel from New York to Washington, DC, on six occasions, of which three times the train was late. Therefore, Jane tells her friends that the probability that this train will arrive on time is 0.50. Would you label t..
Question: 1) Suppose that the frequency distribution of daily high temperatures in a city are normally distributed with a mean of 60 degrees. Suppose that roughly one day every two years has a high temperature of 90-degrees or warmer. If this is the ..
1) A random sample of customer order totals with an average of $78.25 and a population standard deviation of $22.50. Calculate a 90% confidence interval fro the mean, given a sample size of 75 orders
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