Question
In: Statistics and Probability
Grades assigned by an economics instructor have historically followed a symmetrical distribution: 5% A’s, 25% B’s,...
Grades assigned by an economics instructor have historically followed a symmetrical distribution: 5% A’s, 25% B’s, 40% C’s , 25% D’s, and 5% F’s. This year, a sample of 150 grades was drawn and the grades (1 = A, 2 = B, 3 = C, 4 = D, and 5 = F) were recorded. Can you conclude, at the 10% level of significance, that this year’s grades are distributed differently from grades in the past? *****I dont want the excel table answer..I need all the steps.. Thank-you!
Solutions
orchestra answered 1 year agoRelated Solutions
Grades assigned by an economics instructor have historically followed a symmetrical distribution: 5% A’s, 25% B’s,...
Grades assigned by an economics instructor have
historically followed a symmetrical distribution: 5% A’s, 25% B’s,
40% C’s, 25% D’s, and 5% F’s. This year a sample of 150 grades were
drawn and the grades were recorded. The sample had 11 A’s; 32 B’s;
62 C’s; 29 D’s; and 16 F’s. Can you conclude, at the 10% level of
significance, that this year’s grades are
distributed differently from grades in the past?
5. Of the 9-letter passwords formed by rearranging the letters AAAABBCCC (4 A’s, 2 B’s, and...
5. Of the 9-letter passwords formed by rearranging the letters
AAAABBCCC (4 A’s, 2 B’s, and 3 C’s), I select one at random.
Determine the following probabilities.
(a) Prob (my word is a palindrome and has no two C’s next to
each other). 4 points
(b) Prob (my word has two C’s next to each other and the other C
not next to them).
(c) Prob (my word has the three C’s next to each other and the
B’s apart...
5. Of the 9-letter passwords formed by rearranging the letters AAAABBCCC (4 A’s, 2 B’s, and...
5. Of the 9-letter passwords formed by rearranging the letters
AAAABBCCC (4 A’s, 2 B’s, and 3 C’s), I select one at random.
Determine the following probabilities.
(a) Prob (my word is a palindrome and has no two C’s next to
each other).
(b) Prob (my word has two C’s next to each other and the other C
not next to them).
(c) Prob (my word has the three C’s next to each other and the
B’s apart from each...
Microsoft historically followed the practice of recognizing 25% of revenue from its Windows software over three...
Microsoft historically followed the practice of recognizing 25%
of revenue from its Windows software over three or four years as it
promises future upgrades and addons. With the launch of Vista in
2008, it changed the policy to record most of the revenue in the
period in which the software was sold. In the third quarter for
fiscal year 2008, Microsoft reported an increase in earnings of
65%. The increase came from sales of the new Vista program and also...
Sally, Roda, Yousef and Nasser were assigned as a team by their instructor. They have a...
Sally, Roda, Yousef and Nasser were assigned as a team by their
instructor. They have a project to work on for 2
weeks. They met 5 times so far, and it seems that
everything the team discusses becomes an argument. Yousef keeps
accusing Sally of being late and careless. Roda agrees with Yousef
and thinks Sally is putting useless effort on the research. Nasser
on the other hand is supporting Sally's perspective by being
flexible and supporting her approach to the...
What are the four rules that have to be followed to use a Poisson distribution?
What are the
four rules that have to be followed to use a Poisson
distribution?
Suppose we have assigned grades for the 11 students in our data: Grade A for students...
Suppose we have assigned grades for the 11 students in our data:
Grade A for students who scored ≥ 90; B for students who scored ≥
80 and < 90; C for students who scored ≥ 70 and < 80; D for
students who scored ≥ 60 and < 70; F for students who scored
< 60.
Following the above grade scheme, we observe that we have
8 students who received grade A,
2 student received grade B,
0 students...
Data 105, 91, 52, 86, 100, 96, 98, 109, 96, 88,70 Suppose we have assigned grades...
Data 105, 91, 52, 86, 100, 96, 98, 109, 96, 88,70 Suppose we
have assigned grades for the 11 students in our data:Grade A for
students who scored ≥ 90; B for students who scored ≥ 80 and <
90; C for students who scored ≥ 70 and < 80; D for students who
scored ≥ 60 and < 70; F for students who scored < 60.
Following the above grade scheme, we observe that we have 7
students who...
Data 105, 91, 52, 86, 100, 96, 98, 109, 96, 88,70 Suppose we have assigned grades...
Data 105, 91, 52, 86, 100, 96, 98, 109, 96, 88,70
Suppose we have assigned grades for the 11 students in our
data:Grade A for students who scored ≥ 90; B for students who
scored ≥ 80 and < 90; C for students who scored ≥ 70 and <
80; D for students who scored ≥ 60 and < 70; F for students who
scored < 60.
Following the above grade scheme, we observe that we have 7
students who...
You have been assigned to design an experiment to test the effect of 5 different kinds...
You have been assigned to design an experiment to test the
effect of 5 different kinds of fertilizer on the yield of
strawberries grown hydroponically (using water rather than
soil).
How many plants would you use in this study and why? (2
points)
What would you do for a control and why ? (2 points)
How would you assign plants between control and treatment
groups and why would you do it that way ? (2 points)
What would be your...
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