According to the data released by the Chamber of Commerce of a certain city, the weekly...
According to the data released by the Chamber of Commerce of a certain city, the weekly wages (in dollars) of female factory workers are normally distributed with a mean of 625 and a standard deviation of 50. Find the probability that a female factory worker selected at random from the city makes a weekly wage of $620 to $695. (Round your answer to four decimal places.)
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According to the data released by the Chamber of Commerce of a certain city, the weekly...
4. According to the Bureau of Labor Statistics, the average weekly pay for a U.S. production...
4. According to the Bureau of Labor Statistics, the average weekly pay for a U.S. production worker was $441.84. Assume that available data indicate that production worker wages were normally distributed with a standard deviation of $90. What is the probability that a worker earned between $400 and $500? (Round to four decimal places) How much did a production worker have to earn to be in the top 20% of wage earners? (Round to two decimal places) For a randomly...
The average hourly wage of workers at a fast food restaurant is $10.00/hr. Assuming that the...
The average hourly wage of workers at a fast food restaurant is $10.00/hr. Assuming that the wages are normally distributed with a standard deviation of $0.55. If a worker at this fast food restaurant is selected at random, what is the probability that the worker earns less than $8.70 per hour?
9) Electricity bills in a certain city have mean $104.88. Assume the bills are normally distributed...
9) Electricity bills in a certain city have mean $104.88. Assume the bills are normally distributed with standard deviation $12.40. A sample of 69 bills was selected for an audit. Find the 38 percentile for the sample mean. Round to two decimal places. 10) According to one survey, the mean serum cholesterol level for US adults was 197.4 with a standard deviation 51.9. A simple random sample of 96 adults is chosen. Find the 46 percentile for the sample mean....
V. Simple and joint events Following are success data for businesses in one city. Not profitable...
V. Simple and joint events Following are success data for businesses in one city. Not profitable Profitable 23 29 Company size Large Medium Small Total 59 14 Total 52 73 212 337 180 262 32 75 A company is randomly selected. Which of these outcomes are simple events and which are joint events? Large but not profitable • Medium sized Small sized • Profitable and small size 52 Company size Large Medium Small Total Profitable 23 59 180 262 Not...
Example 2.9 In a certain large city, household annual incomes are considered approximately normally distributed with...
Example 2.9 In a certain large city, household annual incomes are considered approximately normally distributed with a mean of s40,o00 and a standard deviation of s6,ooo. What proportion of households in the city have an annual income over $30,0oo? . If a random sample of 6o households were selected, how many of these households would we expect to have annual incomes . between $35,000 and $45,000?
1. The average amount parents and children spent per child on back-to-school clothes in Autumn 2010...
1. The average amount parents and children spent per child on back-to-school clothes in Autumn 2010 was $527. Assume the standard deviation is $160 and that the amount spent is normally distributed. What is the probability that the amount spent on a randomly selected child is more than $700? (Round to four decimal places) What is the probability that the amount spent on a randomly selected child is less than $100? (Round to four decimal places) What is the probability...
Question 2 (4.2 points) In a certain city, the monthly water bill amount is normally distributed...
Question 2 (4.2 points) In a certain city, the monthly water bill amount is normally distributed with mean 25 and standard deviation 15. A sample of 36 bills was selected. What is the probability that the average water bill amount for the sample was between 28.7 and 30? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage. Your Answer:
The Chamber of Commerce in a Canadian city has conducted an evaluation of 300 restaurants in...
The Chamber of Commerce in a Canadian city has conducted an evaluation of 300 restaurants in its metropolitan area. Each restaurant received a rating on a 3-point scale on typical meal price (1 least expensive to 3 most expensive) and quality (1 lowest quality to 3 greatest quality). A crosstabulation of the rating data is shown below. Forty-two of the restaurants received a rating of 1 on quality and 1 on meal price, 39 of the restaurants received a rating...
Use your calculator to determine the probabilities. State what you put in for the lower limit,...
Use your calculator to determine the probabilities. State what you put in for the lower limit, upper limit, mean and standard deviation. 1. Maple tree diameters in a forest area are normally distributed with mean 10 inches and standard deviation 2.5 inches. Find the percentage of trees having a diameter greater than 11 inches 2.White blood cell (WBC) count per cubic millimeter of whole blood follows approximately a Normal distribution with mean 7500 and standard deviation of 1750. What percentage...
Workers at a certain soda drink factory collected data on the volumes (in ounces) of simple...
Workers at a certain soda drink factory collected data on the
volumes (in ounces) of simple random sample of 15 cans of the soda
drink Those volumes have mean of 12.19 oz and a standard deviation
of 0.14 oz and they appear be from a normally distributed
population. If the workers Want the filling process to work so that
almost all cans have volume between 11.88 and 12.52, and the
standard deviation should be less than 0.16 oz. use the...
V. Simple and joint events Following are success data for businesses in one city. Not profitable Profitable 23 29 Company size Large Medium Small Total 59 14 Total 52 73 212 337 180 262 32 75 A company is randomly selected. Which of these outcomes are simple events and which are joint events? Large but not profitable • Medium sized Small sized • Profitable and small size 52 Company size Large Medium Small Total Profitable 23 59 180 262 Not...
Example 2.9 In a certain large city, household annual incomes are considered approximately normally distributed with a mean of s40,o00 and a standard deviation of s6,ooo. What proportion of households in the city have an annual income over $30,0oo? . If a random sample of 6o households were selected, how many of these households would we expect to have annual incomes . between $35,000 and $45,000?
Question 2 (4.2 points) In a certain city, the monthly water bill amount is normally distributed with mean 25 and standard deviation 15. A sample of 36 bills was selected. What is the probability that the average water bill amount for the sample was between 28.7 and 30? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage. Your Answer:
Workers at a certain soda drink factory collected data on the
volumes (in ounces) of simple random sample of 15 cans of the soda
drink Those volumes have mean of 12.19 oz and a standard deviation
of 0.14 oz and they appear be from a normally distributed
population. If the workers Want the filling process to work so that
almost all cans have volume between 11.88 and 12.52, and the
standard deviation should be less than 0.16 oz. use the...
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