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When evaluating the teaching effectiveness of instructors in an academic department of public health, the average test scores obtained by students in their 15 biostatistics classes was recorded to be 78 with a standard error of 2.5. The national average for similar biostatistics courses is known to be 70. Based on this information, can you conclude that instructors in this specific department of public health perform score better than the national average. Justify your conclusion with statistical reasoning by conducting an appropriate test of hypothesis
Research hypothesis:
H1: H0:
Test statistic:
p-value (compare with alpha = .05):
Conclusion in terms of the problem:
Compare and contrast Taguchi's loss functions for the situations target is best, smaller is better, and larger is better. Give examples in the hospitality industry.
Create a scatterlpot of P_RFM and P_HELM. If drawing plot by hand, use graph paper to make sure accuracy. Be sure you label axes. After you have created the scatterplot, consider its form and direction. Recognize outliers, if any.
for the following situation find the mean and standard deviation of the population. list all samples with replacement
Which of the following conditions must be met to conduct a test for the difference in two sample means? Suppose we test the difference between two proportions at the 0.05 level of significance. If the computed z is -1.07, what is our decision?
past surveys reveal that 30 percent of tourists going to las vegas to gamble spend more than 1000. the visitors bureau
a quality control inspector will sample products obtained from a manufacturing process until two noncomforing products
The scatterplot shows data about the products of 40 corporate houses-the percentage of the market share for three or more products & the median annual turnover.
The population standard deviation is known to be 8 minutes. create a hypothesis test to determine if the mean commute time does in fact exceed 40 minutes.
Consider the RVP data presented in Table 15.3. Using the RSS approach discussed in Example 15.1 with set size k = 2, how many of the 36 samples obtained from the pump would we have needed to send to the laboratory for more formal RVP measurements?
Find the probability distribution for M.- Suppose two contestants independently select prize envelopes on two different days. What is the probability that both win the top prize?
An employer is involved in a lawsuit concerning work discrimination.- Does it appear that the employer favors some ethnicities over others when considering candidates for promotion?
Could you explain to me the manual calculation process instead of financial calculator or excel? And please explain in details.
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