Ch 1 and 3
Identify the type of sampling that is used.
A tax auditor selects every 1000th income tax return that is received.
Systematic
In a Survey of consummers, respondents were asked how many cell phones were in use by the household. Among the respondents, 202 answered 'none', 281 said 'one', 366 said 'two', 149 said ' three', and 114 answered 'four or more'. Find the probability that a household has four or more cell phones in use.
0.103
The probability that a radish seed will germinate is 0.7. Estimate the probability that of 140 randomly selected seeds, exactly 100 will germinate. Round to four decimal places.
0.0687
A data set lists earthquake depths. The summay of statistics are n = 600, x-bar is 5.78, s = 4.87 km. Use a 0.01 significance levle to test the claim that these earthquakes are from a po;ulation with a mean equal to 5.00. What is the p-value?
0.0000
When does Summer I 5 week began?
June 9, 2025
Determine whether the given description corresponds to an observational study or an experiment.
A doctor gives a new medication to half of his patients with the flu and a placebo to the other half of his patiene with the flu.
Experiment
In a Survey of consummers, respondents were asked how many cell phones were in use by the household. Among the respondents, 202 answered 'none', 281 said 'one', 366 said 'two', 149 said ' three', and 114 answered 'four or more'. Find the probability that a household has four or more cell phones in use. is it unlikely for a household to have four or more cell phones? Why or why not? Consider the probablity of 0.05 to be unlikely.
No, because the probability of a respondent with foru or more cellphones in use is greater that 0.05.
A laboratory tested twelve chicken eggs and found that the mean amount of cholestol was 185 milligrams with s = 17.6 milligrams. Construct a 95% confidence interval for the true mean cholestrol of all such eggs.
173.8<mu<196.2
A data set lists earthquake depths. The summay of statistics are n = 600, x-bar is 5.78, s = 4.87 km. Use a 0.01 significance levle to test the claim that these earthquakes are from a po;ulation with a mean equal to 5.00. What is the test statistic?
3.92
When does the 1st eight weeks begin for fall?
August 25, 2025
A student earned grades of B, B, A, C, and D. Those courses had these corresponding numbres of credit hours: 4, 5, 1, 5, 4. The grading system assigns quality points to letter grades as follows: A=4, B=3, C=2, D=1 and F=0. Compute the grade point average (GPA) and round the result to two decimal places.
2.37
When a couple has four children, find the probability of getting four girls and no boys.
0.0625
Of 380 random selected medical students, 21 said that they planned to work in a rural community. Find a 95% confidence interval for the true proportion of all medical students who planned to work in a rural community.
0.0323<p<0.0782
A data set lists earthquake depths. The summay of statistics are n = 600, x-bar is 5.78, s = 4.87 km. Use a 0.01 significance levle to test the claim that these earthquakes are from a po;ulation with a mean equal to 5.00. State the final conclusion
There is sufficient evidence to warrant rejection of the claim that the mean of the population of earthquake depths is 5.00 km.
When is the final exam due?
Hilsboro - Tuesday, May 13, 2025
Abbott - Friday, May 9, 2025
Listed below are the top 10 annual salaries (in millions of dollars) of TV personalities. Find the standard deviation for the sample data.
39, 38, 36, 29, 21, 20, 17, 15, 14.8, 13.9
10.17
A presidential candidate plans to begin her campaign by visiting the capitals in 4 of 48 states. What is the probability that she selects the route of four specific captials?
1/(4,669,920)
Find the linear correlation coefficient r.
0.708
In clinical trials among 6099 patients treated with a drug, 166 developed the adverse reaction of nausea. Use a 0.05 significance level to test the claim that 3% of users develop nausea. Identify the null and alternative hypothesis.
H_(0): p = 0.03, H_(1): p ne0.03
What dates are supplemental instructions for this class?
Thurs. 5/1, Tues. 5/6 at 12 p.m.
Listed below are the top 10 annual salaries (in millions of dollars) of TV personalities. Find the variance for the sample data.
39, 38, 36, 29, 21, 20, 17, 15, 14.8, 13.9
103.36
There is a 0.9989 probability that a random selected 28-year-old male lives through the year. A life insurace company charges $191 for insuring that male will iive through the year. If the male does not survive the pokicy pays out $110,000. If a male purchases the policy, what is his expected value?
-70.00
Find the equation of the regression line.
haty=0.494+3.26
In clinical trials among 6099 patients treated with a drug, 166 developed the adverse reaction of nausea. Use a 0.05 significance level to test the claim that 3% of users develop nausea.Should you reject or fail to reject the null hypothesis?
Fail to reject
Where will the supplemental instruction be located for this class?
BHEC Commons