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1. It was stated in the background that 63% of all US Hispanics are Mexican American. Suppose 850 US Hispanics are randomly selected using US Census Bureau information. 575 state that they are Mexican American. Test the population proportion at the 5% significance level.
2. What proportion of Hispanics listen primarily to ads in Spanish? Suppose one source says that in the past the proportion has been about 0.83. A random sample of 438 Hispanics is selected and 347 said they listen primarily to ads in Spanish. Test the past proportion at the 5% significance level.
3. What is the average age of a purchaser of Doritos Salsa Verde? Suppose initial tests indicate it is 31 years. A researcher wants to test this at the 1% significance level. She contacts 24 purchasers of Doritos Salsa Verde and finds that their mean age is 28.81 years with standard deviation 7.09. Assuming that the ages of purchasers are normally distributed in the population, what can the researcher conclude?
Use the Poisson Distribution the indicated probabilities in one year, there were 116 homicide deaths in Richmond VA. For a randomly selected day
1.in the table below we examine the relationship between final grade and the reported hours per week each student said
the american restaurant association collected information on the number of meals eaten outside the home per week by
Some authorities claim that globalization has led to greater income inequality in the U.S. and globally while others claim that inequality is due to improvements in technology and productivity. Using the Library and Internet sources, do the follow..
Descriptive statistics for each of the four variables along with a discussion of what the descriptive statistics tell us about the motion picture industry?
the mean weight of loads of rock is 50.0 tons with a standard deviation of 12.0 tons. if 16 loads are chosen at random
a survey of 131 investment managers in barrons big money poll revealed the followingbull 43 of managers classified
A ski shop manager claims that the average of the sales for her shop is $1800 a day during the winter months. Fifty winter days are selected at random
A test of 45 capsules had a mean weight of 20.9 milligrams and a standard deviation of 0.3 milligrams. Test the makers claim at the 95% confidence level.
Compute the 99% confidence interval for the percentage of packages that are delivered damaged in the population.
What statistical test did the researchers use to determine if there was a statistically significant difference in levels of self-esteem between the boys and the girls?
A person claims to have ESP (extrasensory perception). A coin is tossed 16 times, and each time the person is asked to predict in advance whether the coin will land heads or tails.
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