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There are charts as well – but only for some probabilities so you need to know the formula.

The probability that a person will subscribe to Statistics Monthly is 48%. Find the probability that out of a group of seven, at least one person subscribes. There are charts as well – but only for some probabilities so you need to know the formula. More Binomial Using Calculator.

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There are charts as well – but only for some probabilities so you need to know the formula.

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  1. The probability that a person will subscribe to Statistics Monthly is 48%. Find the probability that out of a group of seven, at least one person subscribes.

  2. There are charts as well – but only for some probabilities so you need to know the formula.

  3. More Binomial Using Calculator Section 6.3B

  4. Using the calculator to find binomial probabilities. • To find exactly 1 probability: binompdf(n, p, x) Press: 2nd Distribution 0 binompdf(n,p,x) n – for number of trials p – for given percent x - # we want

  5. A tourist bureau for a western state conducted a study, which showed that 65% of the people who seek information about the state actually come for a visit. The office receives 15 requests for information on the state. Find the probability that exactly 10 visit. • Binompdf(15, 0.65, 10) • You should get 0.2123 or 21.2%

  6. Remember: PDF is for exactly

  7. To accumulate probabilities – adding more than one- we use binomcdf. • It accumulates starting with x = 0 up to the value you want. • It’s under 2nd distribution A binomcdf (n, p, x)

  8. A survey found that 30% of teens get spending money from part time jobs. If 5 teens are selected at random find the probability that at most 3 of them have part time jobs. 0.96922 On the calculator: Binomcdf(5, 0.30,3)

  9. A survey found that 30% of teens get spending money from part time jobs. If 5 teens are selected at random find the probability that at least 3 of them have part time jobs. On the calculator: Binomcdf(5, 0.30,2)= 0.83692 0.16308 1 - Binomcdf(5, 0.30,2) = 0.16308

  10. To do the bottom of the list: • You accumulate the top part of the distribution. • Subtract from 1.

  11. A survey found that 30% of teens get spending money from part time jobs. If 5 teens are selected at random find the probability that more than 3 of them have part time jobs. On the calculator: Binomcdf(5, 0.30,2)= 0.96922 0.03078 1 - Binomcdf(5, 0.30,3) = 0.03078

  12. Tim did not study for his quiz with 5 multiple choice (A, B, C, D) questions. Hint: Probability of correct choice is ¼ = 0.25! • What is the probability that he got exactly 3 correct? • What is the probability that he got at most 2 correct? • What is the probability that he got more than 3 correct?

  13. A certain type of penicillin will cause a skin rash in 35% of the patients receiving it. • If the penicillin is given to a random sample of 15 patients what is the probability that at least 7 will have a skin rash? • If it is given to a random sample of 9 patients, what is the probability that at least one will have a skin rash? • If it is given to a random sample of 12 patients, what is the probability that exactly 5 will have a skin rash?

  14. Homework *Worksheet

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