Question

In: Statistics and Probability

Marketing companies are interested in knowing the population percent of women who make the majority of...

Marketing companies are interested in knowing the population percent of women who make the majority of household purchasing decisions.

a) When designing a study to determine this population proportion, what is the minimum number you would need to survey to be 90% confident that the population proportion is estimated to within 0.05? (Round your answer up to the nearest whole number.)

b) Suppose a marketing company did do a survey. They randomly surveyed 200 households and found that in 120 of them, the woman made the majority of the purchasing decisions. We are interested in the population proportion of households where women make the majority of the purchasing decisions.
Identify the following. (Enter exact numbers as integers, fractions, or decimals.)

1) x

2) n

3) p'

Solutions

Expert Solution


Related Solutions

Insurance companies are interested in knowing the population percent of drivers who always buckle up before...
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 404 drivers and find that 301 claim to always buckle up. Construct a 91 % confidence interval for the population proportion that claim to always buckle up. Use interval notation, for example, [1,5]
Insurance companies are interested in knowing the population percent of drivers who always buckle up before...
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 399 drivers and find that 283 claim to always buckle up. Construct a 90% confidence interval for the population proportion that claim to always buckle up.
Insurance companies are interested in knowing the population percent of drivers who always buckle up before...
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly surveyed 400 drivers and found that 320 claimed they always buckle up. What is the sample statistic and what is its distribution? Include the parameters of this distribution. Construct a 97% confidence interval the population percent of drivers who always buckle up before riding in a car. Interpret the above confidence interval What is the minimum number you...
Insurance companies are interested in knowing the population percent of drivers who always buckle up before...
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 415 drivers and find that 286 claim to always buckle up. Construct a Invalid variable% confidence interval for the population proportion that claim to always buckle up. Use interval notation, for example, [1,5]
Insurance companies are interested in knowing the population percent of drivers who always buckle up before...
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 415 drivers and find that 286 claim to always buckle up. Construct a 95% confidence interval for the population proportion that claim to always buckle up. Use interval notation, for example, [1,5]
Insurance companies are interested in knowing the population percent of drivers who always buckle up before...
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 401 drivers and find that 319 claim to always buckle up. Construct a 92% confidence interval for the population proportion that claim to always buckle up.
Insurance companies are interested in knowing the population percent of drivers who always buckle up before...
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 387 drivers and find that 287 claim to always buckle up. Construct a 91 % confidence interval for the population proportion that claim to always buckle up. Use interval notation, for example, [1,5] ___________
Insurance companies are interested in knowing the population percent of drivers who always buckle up before...
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 382 drivers and find that 283 claim to always buckle up. Construct a 85% confidence interval for the population proportion that claim to always buckle up. Use interval notation, for example, [1,5]
Insurance companies are interested in knowing the population percent of drivers who always buckle up before...
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. a) When designing a study to determine this population proportion, what is the minimum number of drivers you would need to survey to be 95% confident that the population proportion is estimated to within 0.02? (Round your answer up to the nearest whole number.) _______ drivers b) If it was later determined that it was important to be more than...
Insurance companies are interested in knowing the population percent of drivers who always buckle up before...
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 410 drivers and find that 282 claim to always buckle up. Construct a 95% confidence interval for the population proportion that claim to always buckle up.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT