Normal distribution figurer

Enter mean (average), standard deviation, cutoff points, and this normal distribution calculator volition calculate the surface area (=probability) nether the normal distribution curve.

Normal distribution practice problems:

  • An insurance
    An insurance company receives, on average, two claims per week from a particular factory. Bold that a Poisson distribution can model the number of claims, find the probability it receives. three claims in a given week, more four claims in a given
  • Normal distribution GPA
    The average GPA is 2.78, with a standard difference of 4.5. What are students at the bottom of the 20% having what GPA?
  • Performance comparing
    A standardized test was administered to thousands of students with a mean score of 85 and a standard deviation of 8. A random sample of 50 students was given the same exam and showed an average score of 83.20. Is at that place bear witness to show that this grouping has
  • Statistical survey
    Write Truthful OR False for each question: i Standard deviation measures key location. two. The nigh frequent observation in a data set is known equally the mode. iii The almost passive method of data collection is observation. iv Access time for secondary information is sh
  • Assembly time
    The assembly fourth dimension for the toy follows a normal distribution with a mean of 75 minutes and a standard deviation of nine minutes. The company closes at 5 pm every day. If one starts assembling at 4 pm, what is the probability that he will finish earlier the com
  • Lifespan
    The lifetime of a calorie-free bulb is a random variable with a normal distribution of x = 300 hours, σ = 35 hours. a) What is the probability that a randomly selected lite bulb volition have a lifespan of more than 320 hours? b) To what value of 50 hours can the la
  • Life expectancy
    The life expectancy of batteries has a normal distribution with a mean of 350 minutes and a standard deviation of 10 minutes. What is the range in minutes 68% of the batteries will last? What is the range in minutes? How long will approximately 99.7% of b
  • Decides
    Decide by calculation how many candidates out of a total of 1000 candidates for the position of CEO run across the eligibility requirements for the desired performance of this acme management position with at least 67% probability - provided, of course, that the
  • SD - hateful
    The mean is ten, and the standard departure is 3.5. If the information set contains 40 data values, approximately how many of the data values will fall inside the range of 6.5 to 13.5?
  • 10km race
    Joan'south finishing fourth dimension for the bolder boulder 10 km race was ane.77 standard deviations faster than the women in her historic period group. 415 women ran in her age group. Assuming a normal distribution, how many women ran more chop-chop than Joan?
  • An exam - normal distribution
    V thousand students take an exam with a hateful of 59 and a deviation of 8. How many students volition score less than 75?

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