AP Statistics 2017

Calculator Tip: The TI-83 and early versions of the TI-84 calculator have no function for invT analogous ...

interval either does contain the value (P = 1) or it doesn’t (P = 0). This interval could be one of ...

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Special note concerning the degrees of freedom for the sampling distribution of the difference of two means : I ...

calculator, the second method above (referred to as the “computed by software” method in the chart on the prev ...

The tosses of the coin can be treated as a random sample of coin tosses. Both n and n (1 – ) are gr ...

solution: Since we do not know the standard deviation for either population, we need to use a two-sample t inte ...

of larger samples are less variable than sample means of small samples. However, it is often expensiv ...

Let M be the desired maximum margin of error. Then, Solving for n , But we do not have a value of until we ...

If . You need a sample of at least 1068 customers. By using P * = 0.6, the company was able t ...

removed from expected as we got. A decision about significance can then be made by comparing the ...

confirm by rejecting the null hypothesis. The alternative hypothesis is symbolized by H (^) A or H (^) a. There are ...

average toss, based on 50 throws, was 47.5 yards, and we assumed the population standard deviation was the same ...

Note that, in statistics, the term “error” does not mean somebody did something wrong. It refers to varia ...

Exam Tip: You will not need to know how to actually calculate P(Type II error ) or the power of ...

(d) The probability that the company will change its delivery procedures (e) The probability that t ...

population proportion, we will use P * = 0.5. Then, You would need a minimum of 385 subjects for your ...

Which of the following will increase the power of a test? a. Increase n . b. ...

mean. III. We are 99% confident that the true mean weight loss for this program is between 1.3 lb ...

a. H 0 : μ = 400, H (^) A : μ > 400 b. H 0 : μ ≥ 400, H (^) A : μ ≠ 400 c. H ...