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During WWII, starting in 1944, american bombers flew over Germany and bombed industrial sites. Planes would come back, and some of them had been shot at. Some had holes in wings but most had holes
Base upon these data, determine an unbiased estimate for mean.
Assume the weights of Golden Retrievers are normally distributed with mean of 64 lbs and standard deviation of 4 lbs. What proportion of Golden Retriever weighs between 58 lbs and 70 lbs?
Four draws are made with replacement from a bowl which haves 10 candies: 7 red and 3 green. (With replacement means the candies are drawn one at a time, and each drawn candy is replaced and candies
A computer manufacturer purchases parts from supplier who claims to have a 2% defect rate on their parts. The manufacturer samples 25 parts at random from manufacturer. Determine the probability the
Assume that the distribution of speeds at interstate highway location is bell-shaped with a mean of 70 mph and a standard deviation of 8 mph. Use the appropriate Excel functions to answer the follow
The widget making time for some widget samples are normally distributed with mean of 2250 minutes, and standard deviation of 10.2 minutes. Determine the proportion of the mean widget making time fo
Determine the probability that it takes between 5 and 15 minutes to fall asleep after taking tablet. Determine the mean and standard deviation of the number of minutes its takes to fall asleep after t
The plant manager wants to know what proptio of all batteries produced that day lasted less than 16 hours, which he has declared "unsuitable". From past experience, regarding 10% of batteries made a
Determine each of the following statements as True or False. Briefly discuss each of your answers. For every symmetric random variable X, the median of X equals the average of the first and third quar
A normal distribution has mean of 40 and standard deviation of 6. What percent of scores are between 22 and 58?
How many thermostats should be sampled so that 90% confidence interval specifies the mean to within +- 0.8 F. How many thermostats should be sampled so that 95% confidence interval specifies the mean
Bags checked for certain airline flight have mean weight of 15 kg and standard deviaiton of 5 kg. A random sample of 60 bags is drawn. Determine the probability that sample mean weight is less than
Suppose that a procedure yields a binomial distribution with a trial repeated n times. Use the binomial probability formula to find the probability of x successes given the probability p of success
Assume 13% of American adults think that the highest priority of America is to protect freedom of speech. We will take a random sample of 20 American adults and ask them question. Then the sampling
The vast majority of the world employ a 95% confidence in building confidence intervals. Give your opinion on why 95% confidence is so commonplace. Justify your response.
Determine the probability an individual large-cap domestic stock fund had three-year return of at least 20% (to 4 decimals)? Determine the probability an individual large-cap domestic stock fund had t
Given that z is standard normal random variable, calculate the following probabilities (to 4 decimal places).
New York City is the most expensive city in the United States for lodging. The mean hotel room rate is $204 per night (USA Today, April 30, 2012). Assume that room rates are normally distributed wi
Determine the probability that the hotel room costs between $200 and $300 for each night (to 4 decimal places)
Determine the probability an individual large-cap domestic stock fund had a three-year return of at least 20% (to 4 decimals)? What is the probability an individual large-cap domestic stock fund had a
Discuss why it is significant to update the control charts as soon as new data become available.
How much should be budgeted for weekly repairs, cleaning, and maintenance so that the probability that the budgeted amount will be exceeded in a given week is only0.08? (Round your answer to the nea
Suppose the population is normally distributed. Given the sample size of 25, with sample mean 740 and sample standard deviation 80, we carry out the following hypothesis test. Is this test for popu
Find out the P-value for this test. (Show work and round the answer to three decimal places) Is there sufficient evidence to justify the rejection of at the level? Explain.