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1. An article in Baltimore Sun claimed that the typical supermarket trip takes a mean of 22 minutes. Suppose that in an effort to test this claim, you select a sample of 50 shoppers at a Baltimore City Giant. The mean shopping time for the sample of 50 shoppers is 25.36 minutes, with a standard deviation of 7.24 minutes (estimated from the sample). Using the 0.10 level of significance, is there evidence that the mean shopping at the Baltimore City Giant is different from the claimed value of 22 minutes?
Suppose the horses in a large stable have a mean weight of 1464 lbs, and a standard deviation of 111. What is the probability that the mean weight of the sample horses would differ from the population mean by less than 11 lbs if 34 horses are samp..
Here are fifty observations on the weight of tea bags. Create mean, mode and median.
A business owner decides to use a binomial distribution to solve one of his problems.
How would you find the normal approximation to the binomial probability P(x = 5) in part A? Please show how you would calculate u and standard deviation in the formula for the normal approximation to the binomial
One flight daily to a certain destination. The following information shows the probability distribution of late arrivals for that flight in the past month:
Suppose it has been determined that the average number of customers waiting for service is 1.929. There are two servers. Determine:
At the .05 significance level, can she conclude that there is a difference in the mean amount of weight loss among the three diets?
What is the proportion of people surveyed that rated the subway system from 3 to 4. What is the proportion of people surveyed rated the Subway System from 1 to 3.
You perform a one sample mean hypothesis test on a random sample of data and observe a p-value of 0.2157. What is the appropriate conclusion? Conclude at the 5% level of significance.
Electric utility customer service representative answers a call is 210 seconds. The Gigantic Kilowatt Energy Company randomly sampled 30 calls and found that, on average, they were answered in 183 seconds with a population standard deviation of 30..
If there are 500 students in the school, what is the probability that everyone will pass the exam?
Mean and standard deviation are 584.6 and 34.28
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