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Each day, the United States Customs Service has historically intercepted about $28 million in contraband goods being smuggled into the country, with a standard deviation of $16 million per day. On 64 randomly chosen days in 1992, the U.S. Customs Service intercepted an average of $30.3 mil lion in contraband goods. Does this sample indicate (at a 5 percent level of significance) that the Customs Commissioner should be concerned that smuggling has increased above its historic level?
1. Consider the following data on distances traveled by 60 people to visit the local amusement park.
The 260 business majors and 100 students from the 180 political science majors. Does this sampling plan result in a random sample? Simple random sample? explain."
A standard IQ test has mean of 98 and a standard deviation of 16. We want to be 99% certain that we are 8 IQ points of the true mean. Determine the sample size.
The proportion of people in the United States who speak Spanish is about 0.11; the proportion who speak Chinese is about 0.01.
Use the CLT to determine the probability that the economist's sample will have a mean between 620 and 670. Round interim values to the nearest hundredth as need
Utilizing any available disclosed database for SPSS, develop a researchable set of hypotheses related to the database.
A brewery claims that the mean amount of beer in its bottles is more than 12 ounces. Determine the nature of the hypothesis test.
Crowdedness. In a Chance magazine article (Summer 2005), Danielle Vasilescu and Howard Wainer used data from the United Nations Center for Human Settlements.
an aeroplane flies from a to b at the rate of 500kmhr and comes back from b to a at the rate of 700kmhr. what is the
In a recent national survey, the mean weekly allowance for a nine-year-old child from his/her parents was reported to be $3.65. A random sample of 45 nine-year-olds in northwestern Ohio revealed the mean allowance to be $3.69 with a standard devia..
Identify the dependent variable and the independent variables in this study. Also, state the Omnibus Null and Alternative hypotheses.
Tom Sevits is the owner of the Appliance Patch. Recently Tom observed a difference in the dollar value of sales between the men and women he employs as sales associates.
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