Question
In: Statistics and Probability
For a certain year a study reports that the percentage of college students using credit cards...
For a certain year a study reports that the percentage of college students using credit cards was 87%. A college dean of student services claims that this is too high for her university, so she randomly selects 50 students and finds that 40 of them use credit cards. At = 0.10 is she correct?
State:__________________________________ CV: use table E, F, G, CV=___________________ TV: z, t, or 2 (circle one), TV=________________ Decide:________________________________ Summary: (remember to circle the correct description before completing the statement) There is/is not enough evidence to reject/support the claim that______________________ ________________________________________________________________________ _______________________________________________________________________
Solutions
orchestra answered 2 years agoRelated Solutions
In a study entitled How Undergraduate Students Use Credit Cards, it was reported that undergraduate students...
In a study entitled How Undergraduate Students Use Credit Cards,
it was reported that undergraduate students have a mean credit card
balance of $3173 (Sallie Mae, April 2009). This figure was an
all-time high. Assume that a current study is being conducted to
determine if it can be concluded that the mean credit card balance
for undergraduate students has continued to increase compared to
the April 2009 report. Based on previous studies, use a population
standard deviation σ= $1000.
State...
In a study of government financial aid for college students, they need to estimate the percentage...
In a study of government financial aid for college students,
they need to estimate the percentage of students who graduate in
four years. Find the sample size needed to estimate the percentage.
Use a 4% margin of error, and 90% confidence level.
1. A previous study showed that 60% graduate in four years.
2. We don't know the percentages at all
In a study entitled How Undergraduate Students Use Credit Cards, Sallie Mae reported that undergraduate students...
In a study entitled How Undergraduate Students Use Credit Cards,
Sallie Mae reported that undergraduate students have a mean credit
card balance of $3173. This figure was an all-time high and had
increased drastically over the previous five years. Assume that a
current study is being conducted to determine whether it can be
concluded that the mean credit card balance for undergraduate
students has continued to increase compared to the April 2009
report (i.e. greater than 3173). Based on previous...
In a study entitled How Undergraduate Students Use Credit Cards, Sallie Mae reported that undergraduate students...
In a study entitled How Undergraduate Students Use Credit Cards,
Sallie Mae reported that undergraduate students have a
mean credit card balance of $3173. This figure was an all-time high
and had increased 44% over the previous five years. Assume that a
current study is being conducted to determine whether it can be
concluded that the mean credit card balance for undergraduate
students has continued to increase to the April
2009 report.
Based upon previous studies, the population standard deviation...
Many students graduate from college deeply in debt from student loans, credit cards, and so on....
Many students graduate from college deeply in debt from student
loans, credit cards, and so on. Curious about the impact of debt on
decisions about the future, a WCU sociologist took a random sample
of 401 single students at WCU, classified them by a binary view of
gender, and asked, “Would you consider marrying someone who was
$25,000 or more in debt?” The results of this survey are shown in
the following table. Test at a 1% significance level if...
Eight male and eight female college students who have credit cards were surveyed and asked their...
Eight male and eight female college
students who have credit cards were surveyed and asked their total
credit card debt. The responses are given below in dollars:
Males
1000
2100
900
1200
1300
500
1400
700
Females
1300
500
2000
1800
1300
1000
2600
1400
1. Is this an observational study or a designed experiment?
Explain your answer.
2. Is it reasonable to use Welch’s t-test? Explain your
answer.
3. Is there a difference in the mean credit card debt...
10% of all college students volunteer their time. Is the percentage of college students who are...
10% of all college students volunteer their time. Is the
percentage of college students who are volunteers smaller for
students receiving financial aid? Of the 339 randomly selected
students who receive financial aid, 17 of them volunteered their
time. What can be concluded at the αα = 0.01 level of
significance?
For this study, we should use Select an answer t-test for a
population mean z-test for a population proportion
The null and alternative hypotheses would be:
H0:H0: ? p...
17% of all college students volunteer their time. Is the percentage of college students who are...
17% of all college students volunteer their time. Is the
percentage of college students who are volunteers smaller for
students receiving financial aid? Of the 329 randomly selected
students who receive financial aid, 39 of them volunteered their
time. What can be concluded at the αα = 0.05 level of
significance?
For this study, we should use Select an answer z-test for a
population proportion t-test for a population mean
The null and alternative hypotheses would be:
H0:H0: ? μ...
10% of all college students volunteer their time. Is the percentage of college students who are...
10% of all college students volunteer their time. Is the
percentage of college students who are volunteers smaller for
students receiving financial aid? Of the 322 randomly selected
students who receive financial aid, 26 of them volunteered their
time. What can be concluded at the αα = 0.05 level of
significance?
For this study, we should use Select an answer t-test for a
population mean z-test for a population proportion
The null and alternative hypotheses would be:
H0:H0: ? μ...
The time needed for college students to complete a certain puzzle is modelled using a normal...
The time needed for college students to complete a certain
puzzle is modelled using a normal distribution with a mean of 30
seconds and a standard deviation of 3 seconds. You wish to see if
the
population mean time µ is changed by vigorous exercise, so you have
a group of nine college students
exercise vigorously for 30 minutes and then complete the puzzle.
What is the rejection region at the
significance level 0.01?
What is the power of the...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Question #1 C4H10O with a butanol combustion cycle (formation enthalpy-332,000 kJ / kmol) 25 per cent...
- Suppose a survey revealed that 19% of 494 respondents said they had in the past sold...
- Topic: Choose a company which are you are starting, and a main product or service that...
- 4. Why did the United States and the Soviet Union find themselves in a “Cold War”...
- The Facts: Ann and Bill decided to start a coffee shop. They agreed Bill would provide...
- MARGI sells different types of wine. Customers place orders to the most popular “Summer Wine” at...
- A firm's bonds have a maturity of 8 years with a $1,000 face value, have an...
ADVERTISEMENT