#A standard calculator code#

How many students will score less than 75? If the data set contains 40 data values, approximately how many of the data values will fall within the range of 6.5 to 13.5?įive thousand students take an exam with a mean of 59 and a deviation of 8. The mean is 10, and the standard deviation is 3.5. 3 The most passive method of data collection is observation. The most frequent observation in a data set is known as the mode. Write TRUE OR FALSE for each question: 1 Standard deviation measures central location. Is there evidence to show that this group has A random sample of 50 students was given the same test and showed an average score of 83.20. Assuming a normal distribution, how many women ran more quickly than Joan?Ī standardized test was administered to thousands of students with a mean score of 85 and a standard deviation of 8. Joan's finishing time for the bolder boulder 10 km race was 1.77 standard deviations faster than the women in her age group. a) What is the probability that a randomly selected light bulb will have a lifespan of more than 320 hours? b) To what value of L hours can the la The lifetime of a light bulb is a random variable with a normal distribution of x = 300 hours, σ = 35 hours.

What is the value of x if it is z = +1.50?ĭecide by calculation how many candidates out of a total of 1000 candidates for the position of CEO meet the eligibility requirements for the desired performance of this top management position with at least 67% probability - provided, of course, that the Suppose a distribution has a mean µ = 8 and standard deviation σ = 4. The participants receiving the top 5% of the s Consider that the scores in the exam are normally distributed with a mean of 78 and a standard deviation of 7.5. In a college entrance exam, the participants are rated as excellent, very good, good, and fair. three claims in a given week, more than four claims in a given Assuming that a Poisson distribution can model the number of claims, find the probability it receives. To clear the error message, users should press the “AC” button.An insurance company receives, on average, two claims per week from a particular factory. This happens most often when a user fails to hit the shift button when pressing keys that require this command.

#A standard calculator code#

Occasionally, it is possible to receive an error code on a calculator when the incorrect buttons are pushed. To access an equation stored in the memory bank of a calculator, users can press the “MR,” or memory recall, button.

To input an equation manually, users press “M+” to add an equation or “M-” to delete an equation stored in the memory bank. Most calculators have enough memory to store 10 equations or answers. The “Min” key allows users to save a displayed equation in the calculator’s memory. Most standard calculators also have memory buttons. The last standard key is the decimal (.), which allows a user to input an equation that includes a decimal. To get an exponent while entering an equation, users should press the “EXP” button immediately before entering the value of the exponent. The “pi” button displays the value of pi. Users must press the “shift” key before the “%” key to get an accurate answer. The “%” key is used to calculate percentages. Two very helpful keys on a calculator are “AC” and “CE.” The first key clears the entire memory, and the second key only clears the last numbers that were imputed.