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Use the frequency distribution table below showing a sample data set for 10 students on a test with a maximum score of 20 to answer questions 8 and 9:
Score Frequency Midpoint Midpoint x Frequency Midpoint squared x Frequency1 - 5 46 - 10 311 - 15 216 - 20 1Totals
2. Find the mean score, X , of the data in the frequency distribution above.
3. Find the standard deviation of the scores in the frequency distribution above.
In a few sentences, describe two designs that can address the research question, can international quality system standards reduce the number of medical device failures that cause injury or death to users? The designs must involve two different stati..
In a clinical study of an allergy drug, 112 of the 210 subjects reported experiencing significant relief from their symptoms. At the 0.01 significance level,
Determine the probability that number of requests in 10 hour work day is between 68 and 80 inclusive? Give your answer to four decimal places.
Compute mean absolute percentage error (MAPE) of the forecasts.
After a series of training sessions the restaurant determined the average waiting time was 86 min (s- 12 min) assume the population is normal. what % of patrons waited less than 90 min?
If the top 15% of the test scores are usually good enough for admission to law school, find the cut off score for gaining admission.
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank-sum test, evaluate the significance of the results, assuming there are no ties.
Do the data indicate that the distribution of preferences for older adults is significantly different from the distribution for college students? Test with .05.
Using the .01 significance level you will test to conclude if the analyst finds evidence that the boast of dealership A is correct. What will be your critical value?
Service A delivers the document with probability 0.9, Service B with probability 0.9 and Service C with probability 0.8. What is the probability that at least one copy of the document will be delivered on time?
The one time fling. Have you ever bought the article of clothing (dress, sports jacket, etc.) worn item once to a party, and then returned purchase?
What percent of the sample means will be greater than 162 seconds? What percent of the sample means will be greater than 153 but less than 162 seconds?
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