A researcher wishes to study whether an antibiotic will inhibit the growth of bacteria in a...
A researcher wishes to study whether an antibiotic will inhibit the growth of bacteria in a culture. The researcher inserts the antibiotic into 40 cultures and finds that 30 have reduced growth. A control group of 40 cultures is not given the antibiotic, and 10 of these have reduced growth. Find the margin of error for a 99% confidence interval of the difference in proportion of antibiotic and non-antibiotic cultures.
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A researcher wishes to study whether an antibiotic will inhibit
the growth of bacteria in a...
A biologist wishes to estimate the effect of an antibiotic on the growth of a particular...
A biologist wishes to estimate the effect of an antibiotic on the growth of a particular bacterium by examining the mean amount of bacteria present per plate of culture when a fixed amount of the antibiotic is applied. Suppose he estimates that s = 14 cm2 and that he has a sample size of 35 with sample mean equal to 110 cm2. Assume all conditions are met. (a) What is the the t* value needed to construct a 99% confidence...
A biologist wishes to estimate the effect of an antibiotic on the growth of a particular...
A biologist wishes to estimate the effect of an antibiotic on the growth of a particular bacterium by examining the mean amount of bacteria present per plate of culture when a fixed amount of the antibiotic is applied. Suppose he estimates that s = 10 cm2 and that he has a sample size of 35 with sample mean equal to 110 cm2. (a) What is the standard error of the sample mean? b) What is the the t* value needed...
part a: ***the answer is not*** 2.19 2.728 2.73 2.44 2.14 2.13 part b: ***the answer is not**** (108.005, 119.995) (108, 120) Please help. i will rate A biologist wishes to estimate the...
part a:
***the answer is not***
2.19
2.728
2.73
2.44
2.14
2.13
part b:
***the answer is not****
(108.005, 119.995)
(108, 120)
Please help. i will rate
A biologist wishes to estimate the effect of an antibiotic on the growth of a particular bacterium by examining the mean amount of bacteria present per plate of culture when a fixed amount of the antibiotic is applied. Suppose he estimates that s 13 cm2 and that he has a sample size of...
Suppose Tom, an education researcher, wishes to determine the effects of mandatory study days prior to...
Suppose Tom, an education researcher, wishes to determine the effects of mandatory study days prior to exams upon students in his state. Tom randomly selects 400 of the approximately 85,000 undergraduate students in his state and divides them into two groups of equal size. The first 200 students take a standardized chemistry examination and are graded as either passing or failing. The second 200 students take the same exam but participate in an exam study day immediately prior to the...
show work please Problem 4: Errors in medical prescriptions occur and a study examined whether electronic...
show work please
Problem 4: Errors in medical prescriptions occur and a study examined whether electronic prescribing may help reduce errors. Two groups of doctors used written prescriptions and had similar error rates before the study. One group switched to e-prescriptions while the other continued to use written prescriptions, and error rates were measured one year later. The results are given in the following table. Electronic 254 354 38 3078 2370 a. Find a 99% confidence interval for the difference...
Problem 4: Errors in medical prescriptions occur and a study examined whether electronic prescribing may help...
Problem 4: Errors in medical prescriptions occur and a study examined whether electronic prescribing may help reduce errors. Two groups of doctors used written prescriptions and had similar error rates before the study. One group switched to e-prescriptions while the other continued to use written prescriptions, and error rates were measured one year later. The results are given in the following table. Error No Error Total Electronic 254 3594 3848 Written 1478 2370 3848 a. Find a 99% confidence interval...
Question 9 (1.5 points) A medical researcher wants to construct a 99% confidence interval for the...
Question 9 (1.5 points) A medical researcher wants to construct a 99% confidence interval for the proportion of knee replacement surgeries that result in complications. An article in the Journal of Bone and Joint Surgery suggested that approximately 8% of such operations result in complications. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of o.023 2 Write only an integer as your answer. Your Answer Answet Save Question 10...
A researcher examined a random sample of 300 homes in a small city and found that...
A researcher examined a random sample of 300 homes in a small city and found that 52 had solar panels installed on their roofs. Use the sample to construct a 99% confidence interval for the proportion of all homes in the city that have solar panels installed on their roofs. What is the margin of error for the 99% confidence interval? Round to three decimal places.
A researcher examined a random sample of 300 homes in a small city and found that...
A researcher examined a random sample of 300 homes in a small city and found that 52 had solar panels installed on their roofs. Use the sample to construct a 99% confidence interval for the proportion of all homes in the city that have solar panels installed on their roofs. What is the margin of error for the 99% confidence interval? Round to three decimal places.
True or False? A researcher wants to estimate the impact prenatal care during pregnancy can have...
True or False? A researcher wants to estimate the impact prenatal care during pregnancy can have on premature deliveries by conducting a retrospective case-control study on new moms. If the prevalence of premature births is approximately 10.9%, the researcher should enroll a total of 586 women in the study if the researcher wants to construct a 90% confidence interval for the difference in proportions that has a margin of error of no more than 3%. Please show the calculations for...
part a:
***the answer is not***
2.19
2.728
2.73
2.44
2.14
2.13
part b:
***the answer is not****
(108.005, 119.995)
(108, 120)
Please help. i will rate
A biologist wishes to estimate the effect of an antibiotic on the growth of a particular bacterium by examining the mean amount of bacteria present per plate of culture when a fixed amount of the antibiotic is applied. Suppose he estimates that s 13 cm2 and that he has a sample size of...
show work please
Problem 4: Errors in medical prescriptions occur and a study examined whether electronic prescribing may help reduce errors. Two groups of doctors used written prescriptions and had similar error rates before the study. One group switched to e-prescriptions while the other continued to use written prescriptions, and error rates were measured one year later. The results are given in the following table. Electronic 254 354 38 3078 2370 a. Find a 99% confidence interval for the difference...
Problem 4: Errors in medical prescriptions occur and a study examined whether electronic prescribing may help reduce errors. Two groups of doctors used written prescriptions and had similar error rates before the study. One group switched to e-prescriptions while the other continued to use written prescriptions, and error rates were measured one year later. The results are given in the following table. Error No Error Total Electronic 254 3594 3848 Written 1478 2370 3848 a. Find a 99% confidence interval...
Question 9 (1.5 points) A medical researcher wants to construct a 99% confidence interval for the proportion of knee replacement surgeries that result in complications. An article in the Journal of Bone and Joint Surgery suggested that approximately 8% of such operations result in complications. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of o.023 2 Write only an integer as your answer. Your Answer Answet Save Question 10...
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