Question
In: Statistics and Probability
A University found that 27% of its graduates have taken an introductory statistics course. Assume that...
A University found that 27% of its graduates have taken an introductory statistics course. Assume that a group of 15 graduates have been selected.
- Compute the probability that from this group, there are exactly 2 graduates that have taken an introductory statistics course.
- Compute the probability that from this group, there are at most 3 graduates that have taken an introductory statistics course.
- Compute the probability that from this group, there are at least 4 graduates that have taken an introductory statistics course.
- Compute the expected number, the variance and the standard deviation of graduates that have taken an introductory statistics course.
Solutions
orchestra answered 2 years agoRelated Solutions
A University found that 27% of its graduates have taken an introductory statistics course. Assume that...
A University found that 27% of its graduates have taken an
introductory statistics course. Assume that a group of 15 graduates
have been selected.
Compute the probability that from this group, there are exactly
2 graduates that have taken an introductory statistics course.
Compute the probability that from this group, there are at most
3 graduates that have taken an introductory statistics course.
Compute the probability that from this group, there are at
least 4 graduates that have taken an...
A university found that 20% of its students withdraw without completing the introductory statistics course. Assume...
A university found that 20% of its students withdraw without
completing the introductory statistics course. Assume that 20
students registered for the course.
If required, round your answers to four decimal places.
a. Compute the probability that 2 or fewer will
withdraw.
b. Compute the probability that exactly 4 will
withdraw.
c. Compute the probability that more than 3
will withdraw.
d. Compute the expected number of
withdrawals.
Starting salaries of 90 college graduates who have taken a statistics course have a mean of...
Starting salaries of 90 college graduates who have taken a
statistics course have a mean of $43,993 and a standard deviation
of $9,144. Using 99% confidence level, find the following:
A. Margin of error E
B. The confidenxe interval for the mean u
Starting salaries of 140 college graduates who have taken a statistics course have a mean of...
Starting salaries of 140 college graduates who have taken a
statistics course have a mean of $43,910. The population standard
deviation is known to be $10,625. Using 99% confidence, find both
of the following:
A. The margin of error:
B. Confidence interval: , .
Starting salaries of 64 college graduates who have taken a statistics course have a mean of...
Starting salaries of 64 college graduates who have taken a
statistics course have a mean of $43,500 with a standard deviation
of $6,800. Find an 80% confidence interval for ? μ . (NOTE: Do not
use commas or dollar signs in your answers. Round each bound to
three decimal places.) Find upper and lower bounds.
Starting salaries of 60 college graduates who have taken a statistics course have a mean of...
Starting salaries of 60 college graduates who have
taken a statistics course have a mean of 43,515. Suppose the
distribution of this population is approximately normal and has a
standard deviation of 10,863. Using the 98% confidence level, find
both the following:
the margin error
the confidence interval for the mean ų:________
<ų<_______
Starting salaries of 120 college graduates who have taken a statistics course have a mean of...
Starting salaries of 120 college graduates who have taken a
statistics course have a mean of $44,449. Suppose the distribution
of this population is approximately normal and has a standard
deviation of $9,768.
Using a 99% confidence level, find both of the following:
(NOTE: Do not use commas nor dollar signs in your answers.)
(a) The margin of error E:
(b) The confidence interval for the mean :
Starting salaries of 60 college graduates who have taken a statistics course have a mean of...
Starting salaries of 60 college graduates who have taken a
statistics course have a mean of $44,600. Suppose the distribution
of this population is approximately normal and has a standard
deviation of $8,985.
Using an 81% confidence level, find both of the following:
(NOTE: Do not use commas nor dollar signs in your answers.)
(a) The margin of error:
(b) The confidence interval for the mean μ: <μ<
Starting salaries of 41 college graduates who have taken a statistics course have a mean of...
Starting salaries of 41 college graduates who have taken a
statistics course have a mean of $44,753 and a sample
standard deviation of $10,905.
Using 99% confidence, find both of the following:
A. The margin of error ?
B. The confidence interval for the mean ?:
? <?< ?
Starting salaries of 64 college graduates who have taken a statistics course have a mean of...
Starting salaries of 64 college graduates who have taken a
statistics course have a mean of $44,500 with a standard deviation
of $6,800. Find a 99.7% confidence interval for ?. (NOTE: Do not
use commas or dollar signs in your answers. Round each bound to
three decimal places.)
Lower-bound: Upper-bound:
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