How many observations should a time study analyst plan for in an operation that has a...
How many observations should a time study analyst plan for in an operation that has a standard deviation of 1.8 minutes per piece if the goal is to estimate the mean time per piece to within .4 minute with a confidence of 95.5 percent? (Do not round intermediate calculations. Round up your final answer to the next whole number.)
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How many observations should a time study analyst plan for in an
operation that has a...
Problem 7-11 How many observations should a time study analyst plan for in an operation that has a standard deviation o...
Problem 7-11 How many observations should a time study analyst plan for in an operation that has a standard deviation of 1.4 minutes per piece if the goal is to estimate the mean time per piece to within .3 minute with a confidence of 95.5 percent? (Do not round intermediate calculations. Round up your final answer to the next whole number.) Number of observations
Problem 7-11 How many observations should a time study analyst plan for in an operation that...
A time study of a factory worker has revealed an average observed time of 3.20 minutes,...
A time study of a factory worker has revealed an average observed time of 3.20 minutes, with a standard deviation of 1.28 minutes. These figures were based on a sample of 45 observations. Assume that the firm wants to be 90% confident that the standard time is within 5% of the true value. (Round all intermediate calculations to two decimal places before proceeding with further calculations.) | Based on the given information and the given confidence level and accuracy level,...
In an initial survey designed to estimate the percentage of time air-express cargo loaders are idle,...
In an initial survey designed to estimate the percentage of time air-express cargo loaders are idle, an analyst found that loaders were idle in 8 of the 60 observations. a. What is the estimated percentage of idle time? (Round your answer to 2 decimal places. Omit the "%" sign in your response.) Estimated percentage of idle time 5 points b. Based on the initial results, approximately how many observations would you require to estimate the actual percentage of idle time...
A job in an insurance office involves telephone conversations with policyholders. The office manager estimates that...
A job in an insurance office involves telephone conversations with policyholders. The office manager estimates that about half of the employee's time is spent on the telephone. How many observations are needed in a work sampling study to estimate that time percentage to within 6 percent and have a confidence of 95.5 percent? (Round z values to 2 decimal places. Do not round other intermediate calculations. Round your final answer to the nearest whole number.) Number of observations
In an initial survey designed to estimate the percentage of time air-express cargo loaders are idle,...
In an initial survey designed to estimate the percentage of time air-express cargo loaders are idle, an analyst found that loaders were idle in 8 of the 45 observations. a. What is the estimated percentage of idle time? (Round your answer to 2 decimal places. Omit the "%" sign in your response.) Estimated percentage of idle time % b. Based on the initial results, approximately how many observations would you require to estimate the actual percentage of idle time...
A worker-machine operation was found to involve 3.6 minutes of machine time per cycle in the...
A worker-machine operation was found to involve 3.6 minutes of machine time per cycle in the course of 40 cycles of stopwatch study. The worker’s time averaged 2.1 minutes per cycle, and the worker was given a rating of 111 percent (machine rating is 100 percent). Midway through the study, the worker took a 10-minute rest break. Assuming an allowance factor of 11 percent of work time which is applied only to the worker element (not the machine element), determine...
A worker-machine operation was found to involve 40 minutes of machine time per cycle in the...
A worker-machine operation was found to involve 40 minutes of machine time per cycle in the course of 40 cycles of stopwatch study The worker's time averaged 25 minutes per cycle, and the worker was given a rating of 115 percent machine rating is 100 percent). Midway through the study, the worker took a 10-minute rest break. Assuming an allowance factor of 15 percent of work time which is applied only to the worker element not the machine element), determine...
A teacher wants to estimate the mean time (in minutes) that students take to go from...
A teacher wants to estimate the mean time (in minutes) that students take to go from one classroom to the next. His research assistant uses the sample time of 40 students to report the confidence interval as [7.40, 8.60]. a. Find the sample mean time used to compute the confidence interval. (Round intermediate calculations to 4 decimal places and final answer to the nearest whole number.) Sample Mean - b. Determine the confidence level if the sample standard deviation used...
Time Study: Consider the recorded observations of 10 cycles of the cup packaging operation in seconds,...
Time Study: Consider the recorded observations of 10 cycles of the cup packaging operation in seconds, shown in the figure below. Notice that the data reflects the continuous method in timing the elements. Determine the select times for each work element, the normal time for the cycle, and the standard time per package. Suppose we want a sample size that gives an average within + 2 percent of the true average 95 percent of the time. Did we make enough...
An advertising media analyst wants to estimate the mean weekly amount of time consumers’ spend watching...
An advertising media analyst wants to estimate the mean weekly amount of time consumers’ spend watching television daily. Based on previous studies, the standard deviation is assumed to be 20 minutes. The media analyst wasn’t to estimate, with 99% confidence, the mean weekly amount of time to within +/- 5 minutes. a) What sample sizes is needed b) If 95% confidence is desired, how many consumers need to be selected?
Problem 7-11 How many observations should a time study analyst plan for in an operation that has a standard deviation of 1.4 minutes per piece if the goal is to estimate the mean time per piece to within .3 minute with a confidence of 95.5 percent? (Do not round intermediate calculations. Round up your final answer to the next whole number.) Number of observations
Problem 7-11 How many observations should a time study analyst plan for in an operation that...
A time study of a factory worker has revealed an average observed time of 3.20 minutes, with a standard deviation of 1.28 minutes. These figures were based on a sample of 45 observations. Assume that the firm wants to be 90% confident that the standard time is within 5% of the true value. (Round all intermediate calculations to two decimal places before proceeding with further calculations.) | Based on the given information and the given confidence level and accuracy level,...
In an initial survey designed to estimate the percentage of time air-express cargo loaders are idle, an analyst found that loaders were idle in 8 of the 60 observations. a. What is the estimated percentage of idle time? (Round your answer to 2 decimal places. Omit the "%" sign in your response.) Estimated percentage of idle time 5 points b. Based on the initial results, approximately how many observations would you require to estimate the actual percentage of idle time...
A job in an insurance office involves telephone conversations with policyholders. The office manager estimates that about half of the employee's time is spent on the telephone. How many observations are needed in a work sampling study to estimate that time percentage to within 6 percent and have a confidence of 95.5 percent? (Round z values to 2 decimal places. Do not round other intermediate calculations. Round your final answer to the nearest whole number.) Number of observations
A worker-machine operation was found to involve 40 minutes of machine time per cycle in the course of 40 cycles of stopwatch study The worker's time averaged 25 minutes per cycle, and the worker was given a rating of 115 percent machine rating is 100 percent). Midway through the study, the worker took a 10-minute rest break. Assuming an allowance factor of 15 percent of work time which is applied only to the worker element not the machine element), determine...
Time Study: Consider the recorded observations of 10 cycles of the cup packaging operation in seconds, shown in the figure below. Notice that the data reflects the continuous method in timing the elements. Determine the select times for each work element, the normal time for the cycle, and the standard time per package. Suppose we want a sample size that gives an average within + 2 percent of the true average 95 percent of the time. Did we make enough...
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