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Question: Refer to Exercise. Prepare the cumulative frequency, cumulative relative frequency, and cumulative percentage distributions using the frequency distribution table constructed for the data of that exercise.
Exercise: The following data give the numbers of orders received for a sample of 30 hours at the Timesaver Mail Order Company.
a. Construct a frequency distribution table. Take 23 as the lower limit of the first class and 7 as the width of each class.
b. Calculate the relative frequencies and percentages for all classes.
c. For what percentage of the hours in this sample was the number of orders more than 36?
a. Find the probability that a valve is ground only once. b. Given that a valve is not reground, what is the probability that it is scrapped? c. Find the probability that a valve is scrapped.
A population has a mean=83 and a standard deviation=9. Find the mean and standard deviation of a sampling distribution of sample means with sample size=81.
A random sample of 50 students from this school was selected, and the mean math SAT score was 530. Is the high school justified in its claim? Explain.
The following data are available (number of half-gallon containers sold per day): 48, 59, 45, 62, 50, 68, 57, 80, 65, 58, 79, 69. Assuming that this is a random sample of daily demand, give a 90% con?dence interval for average daily demand for mil..
the probability that a randomly selected pregnancy lasts less than 149 days is approximately .3821.the probability that
a histogram showing the different responses from five groups of government employees is used in a report to emphasize
Discuss at least three reasons why these predictions may not be accurate and offer three ways in which you can increase the likelihood of accurately predicting your customers' purchases.
on saturdays cars arrive at sami schmitts scrub and shine car wash at the rate of 6 cars per fifteen-minute interval.
List an advantage and a disadvantage of a survey conducted in this manner. What sampling technique is used in such a survey?
If it has been estimated that there is a 20% to 30% probability of the patient actually having the illness in question, how should the doctor advise her patient?
Construct a stem-and-leaf plot using the whole numbers as the stems. What advantages does the stem-and-leaf plot of these sales figures offer over the histogram
It is possible to have a sample space in which P(A) = 0.7, P(B) = 0.6, and P(A and B) = 0.35. Given this information, would events A and B be mutually exclusive? Would they be independent?
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