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One study based on responses from 1013 teenagers concluded that 42% cite grades as their greatest source of pressure. Use .05 significance level to test the claim that fewer than half of all teenagers in the population feel that their greatest source of pressure. Find test statisctic and P value.
the probability that a certain kind of scratch-off lottery ticket will win a prize is 0.22. kendra received 8 tickets
What are some critical decisions involved in selecting an appropriate measurment scale? How might these decisions influence the research design?
The high school GPA of applicants for admission to a college program are recorded and relative frequencies are calculated for the categories.
When we take the sample of 100 of these average is $500 and SD is $100. (a) Determine statement to make about range $300 to $700?
the local bakery bakes more than a thousand 1-pound loaves of bread daily and the weights of these loaves vary. the
Express each of the following relationships in terms of probabilities or conditional probabilities relating to the population of animals.
given xn02 where ?2 what is the 25th percentile of this distribution?a -0.67b0.67c -1.34d 1.34e none of the
An automobile manufacturer wants to estimate the mean gasoline mileage that its customers will obtain with its new compact model.
First explain what the Gini coefficient is and what hypothetical Gini values of 0 and 1 mean. Sort the data by the Gini coefficient in 2000 and look at the list of countries.
On the morning of March 5, 1996, a train with 14 tankers of propane derailed near the center of the small Wisconsin town of Weyauwega. Six of the tankers were ruptured and burning when the 1700 residents were ordered to evacuate the town.
Assume the likelihood that any flight on Northwest Airlines arrives within 15 minutes of the scheduled time is 0.90. We choose four flights from yesterday for study.
Perform the 5 steps of hypothesis testing procedure. Please present the calculations and results and Graphs. Make all possible observations and interpret the results
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