Reference no: EM13236075
1. A researcher hypothesizes that individuals who listen to classical music will score differently from the general population on a test of spatial ability. On a standardized test of spatial ability, µ = 58. A random sample of 14 individuals who listen to classical music is given the same test.
Their scores on the test are 52, 59, 63, 65, 58, 55, 62, 63, 53, 59, 57, 61, 60, 59.
a.Is this a one- or two-tailed test?
b.What are H0 and Ha for this study?
c.Compute tobt.
d.What is tcv?
e.Should H0 be rejected? What should the researcher conclude?
f.Determine the 95% confidence interval for the population mean, based on the sample mean.
2. A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in California and finds that the number who exercise regularly is 31 out of 120.
a.What isobt?
b.What is df for this test?
c.What iscv?
d.What conclusion should be drawn from these results?
3. Researchers at a food company are interested in how a new spaghetti sauce made from green tomatoes (and green in color) will compare to their traditional red spaghetti sauce. They are worried that the green color will adversely affect the tastiness scores. They randomly assign subjects to either the green or red sauce condition. Participants indicate the tastiness of the sauce on a 10-point scale. Tastiness scores tend to be skewed. The scores follow.
Participant Red Sauce Green Sauce
1 7 4
2 6 3
3 9 6
4 10 8
5 6 7
6 7 5
7 8 9
a. What statistical test should be used to analyze these data?
b. Identify H0 and Ha for this study.
c. Conduct the appropriate analysis.
d. Should H0 be rejected? What should the researcher conclude?
4. You notice in your introductory psychology class that more women tend to sit up front, and more men sit in the back. To determine whether this difference is significant, you collect data on the seating preferences for the students in your class. The data follow.
Men Women
Front of the Room 15 27
Back of the Room 32 19
a. What isobt?
b. What is df for this test?
c. What iscv?
d. What conclusion should be drawn from these results?
|
Explain agno3 is slowly added to a solution
: What is the Cl ? concentration just as Ag2CrO4 begins to precipitate when 2.0 M AgNO3 is slowly added to a solution containing 0.048 M Cl ? and 0.048 M CrO42-
|
|
What is the mass of the block of ice
: A dockworker applies a constant horizontal force of 82.0N to a block of ice on a smooth horizontal floor, What is the mass of the block of ice
|
|
Evaluate the kinetic energy of the electron in ev
: Pretend that an electron performs 1D motion in the field of the proton so that it's wavefunction is psi(x)=cos(x/a), where a=0.5 Angstrom.
|
|
What are main competitive advantages of using aggregate plan
: What are main competitive advantages of using aggregate planning at Frito-Lay? Provide at least three of them.
|
|
What statistical test should be used to analyze data
: To determine whether this difference is significant, you collect data on the seating preferences for the students in your class. A researcher hypothesizes that individuals who listen to classical music will score differently from the general popula..
|
|
What is nancys utility maximizing scores for exam 1
: Nancy Lerner is trying to decide how to allocate her time in studying for her Economics course.There are two examinations in this course. Her overall score for the course will be the minimum of her scores on the two examinations.
|
|
Western hemisphere
: How were Western Hemisphere (US and Canada, Latin America) and Australia successful in breaking free from European colonization? What form of government did they established followed by independence?
|
|
What is the skier''s launch speed
: The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end, What is the skier's launch speed
|
|
Determine the expenditure approach for economy
: Assume an economy with a coal producer, a steel producer, and some concumers (no gov.) in a given year, the coal producter produces 15M tons of coal and sells it for $5 a ton. the coal producer pay $50M in wages to consumers
|