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Question: When should a researcher use a z test compared to one sample t test? in other words what circumstances is each test considered appropriate? The dean of the school of science dept. is interested in finding out if facility in the psychology dept. publish at different rates than the national average of 8 publication for every 10 years. a random sample of size 5 was taken from academic staff. the data obtained were: 3, 21, 1, 15 and 7 the sample mean is 9.4 standard deviation is 8.41 is the sample mean of 9.4 publication for science facility at school is significantly different than the national average of 8 state both null and alternative hypothesis in symbols and words test your hypothesis (alpha=.05)?
A video store charges a monthly membership fee of $7.50, but the charge to rent each movie is only $1.00 per movie. Another store has no membership fee, but it costs $2.50 to rent each movie. How many movies need to be rented each month for the to..
Prepare a complete statement of cash flows for calendar-year 2011 using the indirect method.
A is the event that a prime number comes up, B is the event that a number divisible by three comes up, C is the event that a perfect square number comes up. Find the sample space S, find complementary events, mutually exclusive events.
The plan is to randomly identify 100 students and obtain their total textbook costs. The average cost for the 100 students will be used to estimate the average cost for all students.
a basketball team won 50 games of 75 played. the team still has 45 games to play. how many of the remaning games must
Find the general solution to the differential equation: t2dy/dt+t(t+2)y=et t>0
Please solve for the following system of equations. Include all of the steps which are involved:
Three particlesof mass 6kg,3kg and 2.5kg are attached to a light rod PR of length 3 meters at the point PQR where PQ=0.9 M .Find the position of the center of the system
Four interpretations are offered below. Three are incorrect and one is correct. Find the three incorrect interpretations and explain the error in each of them
How many urban and suburban families should Trendex interview in order to maximize its profit?
A pineapple is 7 times as heavy as an orange. The pineapple weighs 870 grams more than the orange. What is the weight in grams for the pineapple and orange
A 5000-lb wrecking ball hangs from a 20-ft cable of density 5 lb/ft attached to a crane. Calculate the work done if the crane lifts the ball from ground level to 20 ft in the air by drawing in the cable.
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