Question
In: Statistics and Probability
A makeup test is given and the average (μX) score out of 100 was 85.0, with...
A makeup test is given and the average (μX) score out of 100 was 85.0, with a SD (σX) of 3.0. Assuming a normal distribution, find the dividing line (test scores) between the A's, B's, C's, D's, and E's. This time the highest 6% will be the A's, the next 16% B's, the next 26% C's, the next 36% D's.
Solutions
orchestra answered 2 years agoRelated Solutions
A makeup test is given and the average (μX) score out of 100 was 85.0, with...
A makeup test is given and the average (μX) score out of 100 was
85.0, with a SD (σX) of 3.0. Assuming a normal distribution, find
the dividing line (test scores) between the A's, B's, C's, D's, and
E's. This time the highest 6% will be the A's, the next 16% B's,
the next 26% C's, the next 36% D's.
A test is given and the average (μX) score out of 100 was only a 53.1,...
A test is given and the average (μX) score out of 100
was only a 53.1, with a SD (σX) of 8.9. Assuming the
grades followed a normal distribution, use the Z table or Excel and
formulas to find the dividing line (test scores) between the A's,
B's, C's, D's, and E's. Starting from the top, the teacher will
give the highest 15% A's, the next 10% B's, the next 30% C's, the
next 25% D's, and the bottom 20%...
A test is given and the average (μX) score out of 100 was only a 53.1,...
A test is given and the average (μX) score out of 100 was only a
53.1, with a SD (σX) of 8.9. Assuming the grades followed a normal
distribution, use the Z table or Excel and formulas to find the
dividing line (test scores) between the A's, B's, C's, D's, and
E's. Starting from the top, the teacher will give the highest 15%
A's, the next 10% B's, the next 30% C's, the next 25% D's, and the
bottom 20%...
A test is given and the average (μX) score was 190, with a SD (σX) of...
A test is given and the average
(μX) score was 190, with a SD (σX) of 50.
Assuming a normal distribution for the grades, find the dividing
line (test scores) between the A's, B's, C's, D's, and E's. The
bottom 13% will be assigned the E's, the next 13% will be the D's,
50% will be the C's, the next 15% the B's and the top 9% will be
the A's.
A sample of 50 females is given a test and they score an average of 75...
A sample of 50 females is given a test and they score an average
of 75 on it. A sample of 36 males is also given the test and score
an average of 72 on it. It is known from previous studies that the
females have a standard deviation of 10, while the males have on of
12 on this test. At an alpha of .05 is there a significant
difference in the true means for the females and the...
2. The average score on an exam is 78. A test is given to 40 students...
2. The average score on an exam is 78. A test is given to 40
students and the average on the exam was 82 with a standard
deviation of 14.
a) At the .01 level did the students do better than expected?
(p = .039)
b) How do you explain the 4 point increase?
C) Interpret the p-value:
D) What is the only type of error that could have
occurred
You wish to test the claim that the average IQ score is less than 100 at...
You wish to test the claim that the average IQ score is less
than 100 at the .05 significance level. You determine the
hypotheses are:
Ho: μ=100
H1:μ<100
You take a simple random sample of 38 individuals and find the
mean IQ score is 95.8, with a standard deviation of 15.2. Let's
consider testing this hypothesis two ways: once with assuming the
population standard deviation is not known and once with assuming
that it is known.
Round to three decimal...
You wish to test the claim that the average IQ score is less than 100 at...
You wish to test the claim that the average IQ score is less
than 100 at the .05 significance level. You determine the
hypotheses are:
Ho: μ=100
H1:μ<100
You take a simple random sample of 38 individuals and find the
mean IQ score is 95.8, with a standard deviation of 15.2. Let's
consider testing this hypothesis two ways: once with assuming the
population standard deviation is not known and once with assuming
that it is known.
Round to three decimal...
You wish to test the claim that the average IQ score is less than 100 at...
You wish to test the claim that the average IQ score is less
than 100 at the .01 significance level. You determine the
hypotheses are:
Ho: μ=100
H1:μ<100
You take a simple random sample of 79 individuals and find the
mean IQ score is 96.1, with a standard deviation of 14.8. Let's
consider testing this hypothesis two ways: once with assuming the
population standard deviation is not known and once with assuming
that it is known.
Round to three decimal...
You wish to test the claim that the average IQ score is less than 100 at...
You wish to test the claim that the average IQ score is less
than 100 at the .025 significance level. You determine the
hypotheses are:
Ho: μ=100
H1:μ<100
You take a simple random sample of 60 individuals and find the
mean IQ score is 95.7, with a standard deviation of 16. Let's
consider testing this hypothesis two ways: once with assuming the
population standard deviation is not known and once with assuming
that it is known.
Round to three decimal...
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