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Scenario #1 (use this scenario for the first five questions)
Julius is interested in the volunteering activity of QU students. He predicts that QU students will be engaged in a different number of volunteer activities than the typical college student in the population. He asks a sample of 150 QU students to report how many volunteer activities they have completed while in college and finds that their mean number of volunteering activities completed is 5. The data are normally distributed. He then looks up the national average for volunteer activities among college students, and finds the following µ=6.15, σ=1.25.
Question: Based on the information in this scenario (and after considering the assumptions of each test), which of the following statistical tests would be the most appropriate for testing Julius's hypothesis?
a. Single-sample z test
b. Independent samples t test
c. Single-sample t test
d. Calculate z scores
Tuition of ?$1572 will be due when the spring term begins in 10 months. What amount should a student deposit? today, at 5.76?%, to have enough to pay.
a survey is conducted to verify whether there is a connection between smokers and cardiovascular diseases. 35 over 60
A knew which of his fellow prisoners were to be set free, then his own probability of being executed would rise from 1/3 to ½ because he would then be one of two prisoners. What do you think of the jailer's reasoning?
the eagle ridge contractors association claims the average price of a home in thier subdivision is 125150 with a
American youngsters aged 6 to 19, 15% were seriously overweight. Calculate and interpret a confidence interval using a 99% confience level for the proportion of all american youngsters.
Create a flow diagram for entire process. Include flow paths for students (solid lines) and prescriptions (dashed lines).
Customers arrive at a counter in accordance with a Poisson process of density three arrivals per minute. (a) What is the expected number of arrivals per minute?
A particular poll tracks daily the percentage of Americans who approve or disapprove of the performance by President 1.
In many situations researchers want to know the cut-off scores between which 95% of test takers will fall and 5% of test takers will fall above or below.
Use the .05 significance level and the six-step hypothesis-testing process to check if there is a difference in the mean flight times among the three airlines.
68% it will rain tomorrow. What is the probability it will not rain tomorrow?
New population of pilots has normally distributed weights with mean of 128 lb and standard deviation of 31.7 lbs. If the pilot is randomly selected, determine the probability that his weight is between 120 lb and 181 lb.
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