The MPG (miles per gallon) for a certain compact car is normally distributed with a mean of 31 and a standard deviation of 0.8. What is the probability that the MPG for a randomly selected compact car would be less than 32?
5. In Melanies Styling Salon, the time to complete…
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What proportion of brook trout caught will be between 12 and 18 inches in length?
8. The discrete random variable X is the number of students that show up for Professor Smiths office hours on Monday afternoons. The table below shows the probability distribution for X. What is the expected value E(X) for this distribution?
10. The time required for a citizen to complete the 2000 U.S. Census "long" form is normally distributed with a mean of 40 minutes and a standard deviation of 10 minutes. The slowest 10% of the citizens would need at least how many minutes to complete the form?
11. On average, a major earthquake (Richter scale 6.0 or above) occurs 3 times a decade in a certain California county. What is the probability that less than six months will pass before the next earthquake?
17. On a Sunday in April, dog bite victims arrive at Carver Memorial Hospital at a historical rate of 0.6 victims per day. On a given Sunday in April, what is the probability that exactly two dog bite victims will arrive?
19. If the mean time between unscheduled maintenance of LCD displays in a hospitals CT scan facility is 4,000 operating hours, what is the probability of unscheduled maintenance in the next 5,000 hours?
21. In Melanies Styling Salon, the time to complete a simple haircut is normally distributed with a mean of 25 minutes and a standard deviation of 4 minutes. What percent of customers require less than 32 minutes for a simple haircut?
22. A large number of applicants for admission to graduate study in business are given an aptitude test. Scores are normally distributed with a mean of 460 and standard deviation of 80. What fraction of applicants would you expect to have scores of 600 or above?
23. On average, a major earthquake (Richter scale 6.0 or above) occurs 3 times a decade in a certain California county. Find the probability that at least one major earthquake will occur within
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(“Business Statistics Homework Speech or Presentation”, n.d.)
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(Business Statistics Homework Speech or Presentation)
“Business Statistics Homework Speech or Presentation”, n.d. https://studentshare.org/miscellaneous/1568253-business-statistics-homework.
In other words, it is a measure of the preciseness of the results obtained using the sample population.
Yes, the sampling error can be equal to zero. In this case, it will mean that the sample selected is an ideal representation of the entire
At the .05 level of significance, can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p-value.
As the p-value is not lesser than 0.05, the null hypothesis is dropped. Hence we can conclude on the
The most important factor to consider when making this decision is the sample size of the students considered to obtain the various statistical values above. For instance, the mean that is considered in the statistical values is an average of samples
Out of the patients data a certain doctor treated, 45% never died. If a sample of 80 patients is selected from this population of patients, what is the probability that more than 40 patients never died?
Kincaid, C. D., Wackerly, D. D.,
with a standard deviation of 4.8. Tests are conducted on a new sample of 75 cars using the gasoline plus the additive. Which statistical test should be used to determine whether the additive results in more miles per gallon?
B. A researcher wants to determine whether