A newspaper find that the mean number of typographical error's per page is six find the probability that at most five topographical errors are found on page

A newspaper find that the mean number of typographical error's per page is six find the probability that at most five topographical errors are found on page

Typographic errors in a text are either nonword errors (as when "the" is typed as "teh") or word errors that result in a real but incorrect word. Spell-checking software will catch...

The standard deviation of a sample proportion p^ gets smaller as the sample size n increases. If the population proportion is p = 0.45, how large a sample is needed to reduce the standard...

It is a striking fact that the first digits of numbers in legitimate records often follow a distribution known as Benford's Law, shown below. First digit 1 2 3 4 5 6 7 8 9 Proportion 0.289...

Sheila's doctor is concerned that she may suffer from gestational diabetes (high blood glucose levels during pregnancy). There is variation both in the actual glucose level and in the blood test that...

The College Board finds that the distribution of students' SAT scores depends on the level of education their parents have. Children of parents who did not finish high school have SAT math scores...

a corporation calculates that the cost of photcopies follows a normal distrubution with a mean of 500$ per month and a standard deviation of $50 per month.

a machine fills cough syrup bottles. the distribution for the amount of cough syrup filled by the machine follows a normal distribution with a mean of 12.2 ounces and a standard devation of 0.10 ounces...

a machine fills cough syrup the distrutbution for the amount of cough sryup is filled by the machine folliws a normal distubtion with a mean of 12.2 ounces and a standard deviation of 0.10 ounces...

A state has a lottery game where a person picks one of the 1000? three-digit numbers between 000 and 999. The lottery selects a? three-digit number at random. With a bet of? $1, a person wins $500...

Assuming you are rolling a pair of fair six-sided dice so that your random variable X is the sum of the two up faces. Recall that the population mean and standard deviation are: μX=7, σX= 1.707825 If...

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The test scores on the quantitative portion of the Scholastic Aptitude Test (SAT) are normally distributed with a mean score of 570 and SD of 70. Using the empirical rule, approximately what percent...

An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an estimate at the 80% level of confidence. For a sample of 448 third graders,...

a statistics professor plans classes so carefully that the lengths of her classes are uniformly between 47.0 and 57.0. Find the probability that a given class period runs between 50.25 and 51.0 m...

What units would you expect to see if you were calculating the sample STANDARD DEVIATION of sales from a convenient store?

he amount of money that a student at harvard university carries on his/her person is normally distributed with a mean of $25 and a standard deviation of $5. What is the probability that a randomly...

in a standard normal distribution find the area under the cure for z -scores less than -1.23 round to the 4 decimal places?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 X1 6 2 5 3 2 5...

A bank manager decides to study waiting times of customers for teller service at the noon lunch hour (noon to 1pm). He selects one customer every 20 minutes to measure the time the customer enters...

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