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Joan's nursery specializes in custom-designed landscaping for residential areas. the estimated labour cost associated with a particular landscaping proposal is based on the number of plantings of trees,shrubs and so on to be used for the project. for cost-estimated purposes, managers use two hours of labour time for the planting of a medium sized tree. actual times from a sample of ten plantings during the past month follow (times in hours)
1.7 1.5 2.6 2.22.4 2.32.6 3.0 1.42.3
with a 0.05 level of significance, test to see whether the mean tree-planting time differs from two hours.
1) state the null and alternative hypothesis
2) compute the sample mean
3) compute the sample standard deviation
4) compute the sample (test) statistic
5) formulate the decision rule
6) what is your conclusion
Form a frequency distribution and a percentage distribution that have class intervals with the upper class limits $99, $119, and so on.
Continuous random variable is uniformly distributed between a and b. The probability density function between a and b is.
The ANOVA table is given below,as well as a table of means and standard deviations for the three groups. Evaluate the t statistic for testing contrast
A large bakery buys flour in 25-pound bags. The bakery uses an average of 4,860 bags a year. Preparing an order and receiving a shipment of flour involves a cost of $10 per order. Annual carrying costs are $75 per bag.
We would like to test if the proportion of respondents that support the health care bill is less than 50% (a) what kind of hypothesis test is appropriate?
The state highway department is studying traffic patterns on one of the busiest highways in the state. As part of the study, the department needs to estimate the average number of vehicles that pass an intersection each day. A random sample of 64 ..
What score was earned by more students than any other score? Why? What was the highest score earned on the exam?
When studying the simultaneous responses to two categorical questions, we should set up a:
Research the topic of Job Satisfaction using the Business Source Premier Database (EBSCO) and/or the ABI Inform Global database from the Internet.
Using the probabilities above what is the expected size of family you draw?
Henry performed a two-tailed test for an experiment in which N = 24. He could not find his table of t critical values, but he remembered the tcv at df = 13. He decided to complete his obt.with this tcv. Is he more likely to make a type I or II err..
High School GPA is normally distributed with a mean of 3.06 and a standard deviation of 0.40. The probability of a randomly chosen student having a HS GPA between 3.54 and 3.80 is
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