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A bank is comparing the quality of service given by its two most important branches. In branch A, 192 out of a random selection of 300 of its customers said that they were satisfied with the service. In branch B, 138 out of 50 randomly selected customers said that they were satisfied with the service.
At the 5% level of significance, can we infer that the difference in the level of satisfaction with service between the two branches is wider than 5 p.c. points?
Using α = .05 test for significance differences among the population mean wasted time for theses three urban areas. What is the p-value? What is your conclusion?
Which is the probability that the median of the sample is between $17 and $20?
Determine the probability that person selected has blood type O? Given that person selected is a male, determine the probability that their blood type is AB?
Show the graph of the probability density function for flight time.
Use a 0.05 significance level to test the claim that these credit rating are from a population with a mean that is equal to 700.
Compute the median number of dependents?
An experiment was conducted to determine the effects of three different pesticides (P1,P2,P3) on the yield of three different varieties of citrus tree (V1,V2,V3).
In a poll of 1,004 adults, 93% indicated that restaurants and bars should refuse service to patrons who have had too much to drink. Construct the 90% confidence interval for the proportion of all adults who feel the identical way.
Find the maximum and minimum prices of the houses a contractor will build to include the middle 65% of the market.
This model is fit to the data using the method of least squares using statistical software, and the following parameter estimates and their standard errors are obtained.
Calculate correlation coefficient for these sample data.
The mean maximum oxygen uptake for elite athletes has been found to be 80 with a standard deviation of 8.1. Assume that the distribution is approximately normal.
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