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1. A fast-food restaurant in an urban area experiences a higher traffic rate during the early morning and lunch hours. In order to conduct a customer satisfaction survey, discuss possible sampling procedures.
2. Explain why it is important to obtain feedback from customers on both perceived satisfaction and importance of specified survey items.
Car A is known to have a maximum deceleration of 9.35 m/s2. How fast must car A have been going before its brakes were applied? Answer 97.5 km/h (27.1 m/s).
In addition, the gender of the respondent is noted. After analyzing the results the following table of joint probabilities was produced: Find the probability that a customer who rates Windsor as excellent is a man. 0.45
A square yard of carpet is examined for surface defects. Currently, the process produces an average of 2.4 defects per square yard. What is the probability of finding 2 or more surface defects in the sample.
A sample of 16 batteries reveals a mean of 3.45 years and a standard deviation of 0.3 years. Find a 95% confidence interval for the population mean.
Find Karl Pearson's correlation coefficient between the sales and expenses from the data given below: Sales (Rs. Lakhs) 50 50 55 60 65 65 65 60 60 50 Expenses (Rs. Lakhs) 11 13 14 16 16 15 15 14 13 13?"
Run a regression of sales against local income (only). Based on this regression, give an interval that you are 95% confident will contain your sales in a neighborhood with total income $200M. Do you think this regression is useful for planning you..
Use a 5% level of significance. Make sure to 1. give the null and alternative hypotheses, 2. Calculate the test statistic, and 3. give the conclusion (including a comparison to alpha or the critical value) to receive full credit.
1. a study of commuting times reports the travel times to work of a random sample of 17 employed adults in new york
Generate a 95 % confidence interval for the difference in proportions of patients who report pain relief.
If the distribution of movie admission charges is approximately normal with a standard deviation of $ 0.89 . What is the probability that a randomly selected admission charge is between 6 and 8.2 dollars?
a researcher wishes to be 99 confident that her estimate of the true proportion of individuals who travel overseas is
The probability that a publicity campaign increases the sales is .80. The probability that the cost of developing that campaign of publicity stays within the budget is .40. Suppose that the events are independent, determine the probability that th..
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