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Use traditional hypothesis test approach. Draw a graph showing the test statistic and critical values. Assume the population has a distribution that is approximately normal and that the sample is a simple random sample. Use either the normal distribution or Student t distribution-check conditions to be sure which is appropriate.
List shows winning time in seconds of men in the 100 meter dash for consecutive summer games listed in order by row. Assuming that these results are sample data randomly selected from the population of all past and future Olympic games, test the claim that the mean time is = to 10.5 seconds. What do you observe about the precision of the numbers? What extremely important characteristic of the data set is not considered in this hypothesis test? Do the results from the hypothesis test suggest that the future winning times should be around 10.5 seconds and is such a conclusion valid?
12.0 11.0 11.0 11.2 10.8 10.8 10.8 10.6 10.8 10.3 10.3 10.3 10.4 10.5 10.2 10.0 9.95 10.14 10.06 10.25 9.99 9.92 9.96
Did you find any outliers on the dependent variables that were due to errors of coding? If so, what and why? How would you correct an error of coding?
Assume the arrival of these emails i3 approximated by the Poisson distribution.
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the oth..
Determine the highest and lowest scores and calculate the range. Determine an appropriate interval size (i) for grouping data. Draw a frequency polygon from the data. Are the data normal or skewed?
I need to collect both primary and secondary data regarding the research issue on salary of baseball players. (the aim of this research is to verify whether the salary of the baseball players varies with respect to the state)
Write an expression for the probability that during a given 1-min period, all of the operators receive exactly the same number of requests.
An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another 10,000 to their previous formula.
An automobile insurance company estimates the following loss probabilities for the next year on a $25,000 sports car:
Give an example of a hypothesis test you could perform at work or at home. State what the Null and the Alternative hypotheses would be in your test.
A test statistic is computed from sample data in hypothesis testing and is used in making a decision about whether or not to reject the null hypothesis. True or False
For the most recent year available the mean annual cost to attend a private university in the US was $26,889. Assume the distribution of annual costs follows a normal probability distribution and the standard deviation is $4,500. 95% of all studen..
Estimate the probability the store will gross over $850 a) Fewer than 5 out of 10 business days.
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