A pharmacist wishes to determine the percentage of adults who take vitamins. He wishes to be...
A pharmacist wishes to determine the percentage of
adults who take vitamins. He wishes to be 99% confident that the
estimate is within 2 percentage points of the true proportion. A
recent study of 180 adults showed that 25% took vitamins.
a. How large should the sample size be?
b. If no estimate of the sample proportion is available, how large
should the sample be?
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A pharmacist wishes to determine the percentage of
adults who take vitamins. He wishes to be...
(11)) A medical researcher wishes to determine the percentage of females who take vitamins. He wishes...
(11)) A medical researcher wishes to determine the percentage of females who take vitamins. He wishes to be 99% confident that the estimate is within 2 percentage points of the true proportion. A recent study of 180 females showed that 25% took Vitamins How large should the sample size be? If no estimate of the sample proportion is available, how large should be the sample be? a. b.
medical researcher wishes to determine the percentage of females who take vita to be 99% confident...
medical researcher wishes to determine the percentage of females who take vita to be 99% confident that the estimate is within 2 percentage points of th survey showed that 25% of females took vitamins. How large should a sample size be? 3 A A medical researcher wishes to determine the percentage of females who take vitamins. He wishes e true proportion. A recent a) b) If no estimate of the sample proportion is available, how large should the sample be?
A researcher wishes to estimate the percentage of adults who support abolishing the penny.
A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 5 percentage points with 99% confidence if (a) he uses a previous estimate of 26%? (b) he does not use any prior estimates?
A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size...
A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 55 percentage points with 99% confidence if (a) he uses a previous estimate of 38%? (b) he does not use any prior estimates?
A researcher wishes to estimate, with 95% confidence, the percentage of adults who support abolishing the...
A researcher wishes to estimate, with 95% confidence, the percentage of adults who support abolishing the penny. His estimate must be accurate within 5% of the true proportion. a) Find the minimum sample size needed, using a prior study that found that 32% of the respondents said they support abolishing the penny . b) No preliminary estimate is available. Find the minimum sample size needed. a) What is the minimum sample size needed using a prior study that found that...
A researcher wishes to estimate the percentage of adults who support abolishing the penny. what size...
A researcher wishes to estimate the percentage of adults who
support abolishing the penny. what size sample should be obtained
if he wishes the estimate to be within 4 percentage points with 90%
confidence if:
a.) he uses previous estimate of 28%
b.) he does not use any prior estimates?
c a Arenewcher wishes to estimate the percentage of adults who support abolishing the penny Whatsze sample should be obtained if he wishes the estimate to be within 4 percentage...
A researcher wishes to estimate, with 99% confidence, the population proportion of adults who support labeling...
A researcher wishes to estimate, with 99% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 6% of the true proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 83% of the respondents said they support labeling legislation for GMOs. (c) Compare the results from parts (a) and (b).
2. A researcher wishes to estimate the population proportion of adults who are confident in the...
2. A researcher wishes to estimate the population proportion of adults who are confident in the U.S. banking system. He wishes to estimate the proportion to within 3% with 95% confidence. How many adults should be included in the sample? A. 384 B. 385 C. 73 D. 1068 E. Insufficient information to answer the question
A researcher wishes to estimate, with 99% confidence, the population proportion of adults who think Congress...
A researcher wishes to estimate, with 99% confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 2% of the true proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 18% of the respondents said they think Congress is doing a good or excellent job. (c) Compare the results from...
this region A researcher wishes to estimate the percentage of adults who support abolishing the penny....
this region A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 5 percentage points with 90% confidence if 5. he uses a previous estimate of 38% b. he does not use any prior estimates? Page 4 of 4
(11)) A medical researcher wishes to determine the percentage of females who take vitamins. He wishes to be 99% confident that the estimate is within 2 percentage points of the true proportion. A recent study of 180 females showed that 25% took Vitamins How large should the sample size be? If no estimate of the sample proportion is available, how large should be the sample be? a. b.
medical researcher wishes to determine the percentage of females who take vita to be 99% confident that the estimate is within 2 percentage points of th survey showed that 25% of females took vitamins. How large should a sample size be? 3 A A medical researcher wishes to determine the percentage of females who take vitamins. He wishes e true proportion. A recent a) b) If no estimate of the sample proportion is available, how large should the sample be?
A researcher wishes to estimate the percentage of adults who
support abolishing the penny. what size sample should be obtained
if he wishes the estimate to be within 4 percentage points with 90%
confidence if:
a.) he uses previous estimate of 28%
b.) he does not use any prior estimates?
c a Arenewcher wishes to estimate the percentage of adults who support abolishing the penny Whatsze sample should be obtained if he wishes the estimate to be within 4 percentage...
A researcher wishes to estimate, with 99% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 6% of the true proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 83% of the respondents said they support labeling legislation for GMOs. (c) Compare the results from parts (a) and (b).
2. A researcher wishes to estimate the population proportion of adults who are confident in the U.S. banking system. He wishes to estimate the proportion to within 3% with 95% confidence. How many adults should be included in the sample? A. 384 B. 385 C. 73 D. 1068 E. Insufficient information to answer the question
this region A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 5 percentage points with 90% confidence if 5. he uses a previous estimate of 38% b. he does not use any prior estimates? Page 4 of 4
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