Garde 11 Statistics and Probability Assessment
Authored by Marilou Rojo
Mathematics
11th - 12th Grade
CCSS covered
Used 13+ times
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8 questions
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1.
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30 sec • 1 pt
The average weight of a newborn is 7.5 pounds, with a standard deviation of 1.25 pounds. Birth weight follows the standard normal curve. What percent of newborns weigh 5 pounds or less at birth?
Tags
CCSS.HSS.ID.A.4
2.
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30 sec • 1 pt
The amount of fuel used by jumbo jets to take off is normally distributed with a mean of 4000 gallons and a standard deviation of 125 gallons. What is the probability that the mean number of gallons of fuel needed to take off for a randomly selected sample of 40 jumbo jets will be less than 3950 gallons?
Tags
CCSS.HSS.ID.A.4
3.
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1 min • 1 pt
A group of 625 students has a mean age of 15.8 years with a standard deviation of 0.6 years. The ages are normally distributed. What is the probability that a randomly selected student is older than 16.5 years old?
Tags
CCSS.HSS.ID.A.4
4.
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1 min • 1 pt
A national achievement test is administered annually to 11th HS students. The test has a mean score of 100 and a standard deviation of 15. If Jane's z-score is 1.20, what was her score on the test?
Tags
CCSS.HSS.ID.A.4
5.
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1 min • 1 pt
The scores of a random sample of 100 high school students on a standardized mathematics test in school A gave a mean of 78 and a standard deviation of 20.
Find the 95% confidence interval estimate for the true average score in mathematics in this standardized test.
Tags
CCSS.HSS.IC.B.4
6.
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1 min • 1 pt
The number of motorcycles sold annually by salespeople is normally distributed with a standard deviation of 15. A random sample of 300 salespeople was taken and the mean number of motorcycles sold annually was found to be 75. Find the 99% confidence interval estimate of the population mean.(Round your answers to the nearest thousandths)
Tags
CCSS.HSS.IC.B.4
7.
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1 min • 1 pt
An independent group of researchers wants to estimate the daily household expenses on food. They want a 90% confidence level and P1,800 margin of error. How many households must be randomly selected if in the previous survey the standard deviation is P5,600?
Tags
CCSS.HSS.IC.B.4
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