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The data is online. This is from question 14.45 in the textbook. Zagat's publishes restaurant ratings for various locations in the United States. The file Restaurants contains the Zagat rating for food, décor, service and cost per person for a sample of 50 restaurants located in a city and 50 restaurants located in a suburb. Develop a regression model to predict the cost per person, based on a variable that represents the sum of the ratings for food, décor, and service and a dummy variable concerning location (city versus suburban).
Tay-Sachs couples. Approximately 1 in 28 people of Ashkenazi Jewish descent are Tay-Sachs carriers. In randomly sampling one man and one woman from this population, what is the probability neither is a Tay-Sachs carrier?
Do a two-sided Fisher's exact test at the 0.05 level of the null hypothesis that the lady is guessing randomly. Do a one-sided test at the 0.05 level.
This process occurs twenty times, so that twenty spheres have been placed in bins. What is the expected number of empty bins at the end?
The network is said to be robust if at least one of the three servers operate more than 2 years. What is the probability that the network is robust?
For a sample of 35 nails, the mean length is 2.025 inches. Using the 0.01 level of significance, examine the null hypothesis that the machine is adjusted properly. Determine and interpret the p-value for the test.
Find the 98% confidence interval for the mean number of peaches per tree. How many trees does she need to sample to be accurate within 10 peaches per tree?
a) What is the mean number of stops per hour? b) What is the standard deviation of stops per hour?
a manufacturer has designed a process to produce pipes that are 10 feet long. the distribution of the pipe length
if a person bought one share of google stock within the last year what is the probability that the stock on that day
You are investigating the flight characteristics of different kinds of birds. You collect a sample of 33 European swallows (Hirundo rustica) and measure their air-speed velocity in a borrowed wind tunnel.
The correlation between Age and Income as measured on 100 people is r = 0.75. Explain whether or not each of these possible conclusions is justified:
Explain how they would conduct this experiment using a completely randomized design.- Explain how they would conduct this experiment using a randomized block design.
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