Mukiwa

A quality control expert wants to estmate the proportion of defective components being maufactured by his company to within 2.5%. A sample of 300 components showed that 20 were defective. Howlarge a sample is needed to estimate the true proportion of defective compnents with 99% confidence?

A quality control expert wants to estmate the proportion of defective components being maufactured by his company to within 2.5%. A sample of 300 components showed that 20 were defective. Howlarge a sample is needed to estimate the true proportion of defective compnents with 99% confidence?

A teacher hypothesizes that the final grades in her class are distributed as 10%- A's, 23%-B's, 45%-C's and 8% F's. If at the end of the semester she has the following grades was she correct in her hypothesis? Use alpha= 0.05

Grades at semester end- A-6, B-14, C-22, D-8, F-4

A quality control expert wants to estimate the proportion of defective components that are being manufactured by his company to within 2.5%. A sample of 300 components showed that 20 were defective. How large a sample is needed to estimate the true proportion of defective components with 99% confidence?

Dr. Johnson a nutritionist claims that the average number of calories in a serving of popcorn is 75 with a standard deviation of 7. A sample of 50 servings of popcorn yields an average of 78 calories. Check Dr. Johnsons claim at Alpha= 0.05?

a quality control expert wants to estimate the proportion of defective components that are being manufactured by his company to within 2.5%. A sample of 300 components showed that 20 were defective. How large a sample is needed to estimate the true proportion of defective components with 99% confidence?

A survey of lobster fishermen found that they catch an average of 32 pounds of lobster per day with a standard deviation of 4 pounds. If a random sample of 30 lobster fishermen is selected, what is the probability that their average catch is less than 31.5 lbs?

A survey of lobster fishermen found that they catch an average of 32 pounds of lobster per day with a standard deviation of 4 pounds. If a random sample of 30 lobster fishermen is selected, what is the probability that their average catch is less than 31.5 lbs?

A class can read an average 175 words per minute with a standard deviation of 20 words per minute. The top 3% get an award. What is the minimum number of words a student must read in order to get an award?