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Q1) A public bus company official claims that mean waiting time for bus number 14 during peak hours is less than 10 minutes. Karen took bus number 14 in peak hours on 18 different occasions. Her mean waiting time was 7.2 minutes with standard deviation of 1.6 minutes. At 0.01 significance level, test claim that the mean is less than 10 minutes. You may suppose that time spent waiting for bus 14 is normally distributed.
According to College Board's report, average tuition and fees at four year private colleges and universities in United States was $20,273 for academic year 2002 - 2003 and standard deviation was $4100. For random sample of 100 four year private U.S. colleges:
a) Compute the mean of the sampling distribution?
b) Compute the standard deviation of sampling distribution?
c) Compute the probability that mean tuition and fees of sample is greater than $20,000?
d) Determine probability that mean tuition and fees of sample is less than $18,000?
e) Compute the probability that mean tuition and fees of sample is within $410 of population mean?
If a group is chosen from a population on the basis of sharing the same percentages of trait features as known to exist in the population, then the group so chosen would constitute:
Consider the experiment of rolling a pair of dice. Suppose that we are interested in the sum of the face values showing on the dice.
What is the probability that a randomly chosen eight-week old baby smiles between 2 and 18 seconds?
Make for more scatter plots comparing GDP growth 1970-2000 to corruption, political rights, rule of law, and socio-political instability
Randomly select a sample of five rental agencies. Start with row two and column two. The number is 90935. Use the first two numbers starting with 90.
Iit is known that signal change in this brain area is normally distributed with mean of 35 and standard deviation of 10. By using .01 level, what must researcher conclude?
The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds.
Based on these results, the proportion of the variation in 1993 winnings that is explained by the average number of putts per round and driving distance
Compute the probability of exactly 0,1,2,3,4, and 5 arrivals per day.
Leggo's pesto is make from a recipe brought to America by an immigrant ancestor the present generation refers to as Bisnonna Maria.
Find out the variance for percentage of tickets? Determine the probability that your sample will have the average between 70 and 75?
The mean amount of time a (unnamed) computer server is down is 18.3 minutes with a standard deviation of 5.7 minutes.
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