Homework Answers
sample proportion, = 0.44
sample size, n = 36
Standard error, SE = sqrt(pcap * (1 - pcap)/n)
SE = sqrt(0.44 * (1 - 0.44)/36) = 0.0827
Given CI level is 95%, hence α = 1 - 0.95 = 0.05
α/2 = 0.05/2 = 0.025, Zc = Z(α/2) = 1.96
Margin of Error, ME = zc * SE
ME = 1.96 * 0.0827
ME = 0.162
Margin of error = 16.2%
CI = (pcap - z*SE, pcap + z*SE)
CI = (0.44 - 1.96 * 0.0827 , 0.44 + 1.96 * 0.0827)
CI = (0.278 , 0.602)
CI = 27.8% to 60.2%
Add Answer to:
A new fertilizer was applied to the soil of 36 bean plants. 44% showed increased growth....
A new fertilizer was applied to the soil of 81 bean plants. 52% showed increased growth....
A new fertilizer was applied to the soil of 81 bean plants. 52% showed increased growth. Find the margin of error and 95% confidence interval for this statistic. (Round all answers to 1 decimal place.) Margin of Error (as a percentage):_?_% Confidence Interval: _?_% to _?_%
A new fertilizer was applied to the soil of 81 bean plants. 52% showed increased growth....
A new fertilizer was applied to the soil of 81 bean plants. 52% showed increased growth. Find the margin of error and 95% confidence interval for this statistic. (Round all answers to 1 decimal place.) Margin of Error (as a percentage):_?_% Confidence Interval: _?_% to _?_%
A new fertilizer was applied to the soil of 36 bean plants. 52% showed increased growth....
A new fertilizer was applied to the soil of 36 bean plants. 52% showed increased growth. Find the margin of error and 95% confidence interval for this statistic. Round all answers to 1 decimal place. Margin of Error (as a percentage): % Confidence Interval: % to Add Work Submit Question A sample of voters were polled to determine the likelyhood of measure 324 passing. The poll determined that 37 % of voters were in favor of the measure with a...
A random sample of ?=80 in-coming college freshmen showed that 44 were planning to bring a...
A random sample of ?=80 in-coming college freshmen showed that 44 were planning to bring a car with them to campus next fall. Suppose that we are interested in forming a confidence interval at 95 percent for the proportion of all in-coming college freshmen who are planning to bring a car to campus next fall. Where appropriate, express your answer as a proportion (not a percentage). Round answers to three decimal places. Estimate: _______ Standard error: ________ Multiplier:_________
It is said that happy and healthy workers are efficient and productive. A company that manufactures...
It is said that happy and healthy workers are efficient and productive. A company that manufactures exercising machines wanted to know the percentage of large companies that provide on-site health club facilities. A sample of such 240 companies showed that 98 of them provide such facilities on site. Construct a 95% confidence interval for the percentage of all such companies that provide such facilities on site. What is the margin of error for this estimate? Round your answers to one...
A website is trying to increase registration for first-time visitors. Of 957 randomly sampled visitors over...
A website is trying to increase registration for first-time visitors. Of 957 randomly sampled visitors over a month who saw the new design, 210 registered. Find the margin of error and confidence interval for the percentage of visiters who register, at the 90% level of confidence. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval: *% to Find the margin of error and confidence interval for the percentage of visiters who register, at the...
You may need to use the appropriate appendix table or technology to answer this question A...
You may need to use the appropriate appendix table or technology to answer this question A center for education statistics reported that 44% of college students work to pay for tuition and living expenses. Assume that a sample of 440 college students was used in the study (a) Provide a 95% confidence interval for the population proportion of college students who work to pay for tuition and living expenses. (Round your answers to four decimal places.) (b) Provide a 99%...
Recorded here are the germination times in days) for ten randomly chosen seeds of a new type of bean: 14, 21, 11, 1...
Recorded here are the germination times in days) for ten randomly chosen seeds of a new type of bean: 14, 21, 11, 14, 15, 17, 13, 13, 12, 14 Assuming that germination times are normal distributed, find a 95% confidence interval for the mean germination time for all beans of this type. Then complete the table below Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (if necessary, consulta list of formules.)...
A random sample of ?=80n=80 in-coming college freshmen showed that 44 were planning to bring a...
A random sample of ?=80n=80 in-coming college freshmen showed that 44 were planning to bring a car with them to campus next fall. Suppose that we are interested in forming a confidence interval at 90 percent for the proportion of all in-coming college freshmen who are planning to bring a car to campus next fall. Where appropriate, express your answer as a proportion (not a percentage). Round answers to three decimal places. (a) The estimate is: . (b) The standard error...
It is said that happy and healthy workers are efficient and productive. A company that manufactures...
It is said that happy and healthy workers are efficient and productive. A company that manufactures exercising machines wanted to know the percentage of large companies that provide on-site health club facilities. A sample of 240 such companies showed that 101 of them provide such facilities on site. Construct a 96% confidence interval for the percentage of all such companies that provide such facilities on site. What is the margin of error for this estimate? Round your answers to one...
A new fertilizer was applied to the soil of 36 bean plants. 52% showed increased growth. Find the margin of error and 95% confidence interval for this statistic. Round all answers to 1 decimal place. Margin of Error (as a percentage): % Confidence Interval: % to Add Work Submit Question A sample of voters were polled to determine the likelyhood of measure 324 passing. The poll determined that 37 % of voters were in favor of the measure with a...
A website is trying to increase registration for first-time visitors. Of 957 randomly sampled visitors over a month who saw the new design, 210 registered. Find the margin of error and confidence interval for the percentage of visiters who register, at the 90% level of confidence. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval: *% to Find the margin of error and confidence interval for the percentage of visiters who register, at the...
You may need to use the appropriate appendix table or technology to answer this question A center for education statistics reported that 44% of college students work to pay for tuition and living expenses. Assume that a sample of 440 college students was used in the study (a) Provide a 95% confidence interval for the population proportion of college students who work to pay for tuition and living expenses. (Round your answers to four decimal places.) (b) Provide a 99%...
Recorded here are the germination times in days) for ten randomly chosen seeds of a new type of bean: 14, 21, 11, 14, 15, 17, 13, 13, 12, 14 Assuming that germination times are normal distributed, find a 95% confidence interval for the mean germination time for all beans of this type. Then complete the table below Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (if necessary, consulta list of formules.)...
It is said that happy and healthy workers are efficient and productive. A company that manufactures exercising machines wanted to know the percentage of large companies that provide on-site health club facilities. A sample of 240 such companies showed that 101 of them provide such facilities on site. Construct a 96% confidence interval for the percentage of all such companies that provide such facilities on site. What is the margin of error for this estimate? Round your answers to one...
Most questions answered within 3 hours.
-
the
total pressure for a mixture of N2O4 and NO2 is 2.20 atm. If Kp=
7.10...
asked 9 minutes ago -
23. Which molecule has only covalent bonds? A. CO2 B. Al2O3 C.
Mg3N2
24. The octet...
asked 6 minutes ago -
Delaware Corp. prepared a master budget that included $22,385
for direct materials, $28,600 for direct labor,...
asked 6 minutes ago -
For pesticide HCB (hexachlorobenzene), its logarithmic partition
coefficient log Kow is 5.6. What would be the...
asked 9 minutes ago -
A chemist requires 0.422 mil Na2CO3 for a reaction. How many
grams does this correspond to?
asked 13 minutes ago -
If the vapor pressure of carvone is approximately 9.4 torr at 99
°C, approximately how much...
asked 32 minutes ago -
A juice bottling company is carrying out a test at 10%
significance that the mean population...
asked 43 minutes ago -
What is the reflectivity (in percent) needed to keep water at a
temperature near its freezing...
asked 46 minutes ago -
Suppose that the average surface temperature of Earth is 300K.
Assume this is uniform over its...
asked 47 minutes ago -
Draw the condensed structural formula for alkenes and alkynes or
the line-angle structural formula for cycloalkenes...
asked 47 minutes ago -
M. Laing has suggested a new arrangement of the periodic table
(J.Chem.Ed.1989, 66,
746). Answer the following...
asked 1 hour ago -
Café Michigan's manager, Gary Stark, suspects that demand for
mocha latte coffees depends on the price...
asked 1 hour ago