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Get Full Access to Statistics: Informed Decisions Using Data - 5 Edition - Chapter 6.3 - Problem 12
Get Full Access to Statistics: Informed Decisions Using Data - 5 Edition - Chapter 6.3 - Problem 12

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# ?Calls to the Help Desk The phone calls to a computer software help desk occur at the rate of 2.1 per minute between 3:00 p.m. and 4:00 p.m. Compute th ISBN: 9780134133539 240

## Solution for problem 12 Chapter 6.3

Statistics: Informed Decisions Using Data | 5th Edition

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Problem 12

Calls to the Help Desk The phone calls to a computer software help desk occur at the rate of 2.1 per minute between 3:00 p.m. and 4:00 p.m. Compute the probability that the number of calls between 3:10 p.m. and 3:15 p.m. is

(a) exactly eight. Interpret the result.

(b) fewer than eight. Interpret the result.

(c) at least eight. Interpret the result.

Step-by-Step Solution:

Step 1 of 5) Calls to the Help Desk The phone calls to a computer software help desk occur at the rate of 2.1 per minute between 3:00 p.m. and 4:00 p.m. Compute the probability that the number of calls between 3:10 p.m. and 3:15 p.m. is (a) exactly eight. Interpret the result. (b) fewer than eight. Interpret the result. (c) at least eight. Interpret the result. Notice that having prior estimates of the population proportions reduces the number of individuals that need to be surveyed from 2135 to 1863. Because fewer individuals need to be surveyed, the costs of the study (in terms of time and money) are less when prior estimates are available. In Other Words If possible, obtain a prior estimate of pn when doing sample size computations. Inference for Two Population Proportions. TI-83/84 Plus Hypothesis Tests 1. Press STAT, highlight TESTS, and select 6:2–PropZTest c. 2. Enter the values of x1, n1, x2, and n2. 3. Highlight the appropriate relation between p1 and p2 in the alternative hypothesis. 4. Highlight Calculate or Draw and press ENTER. Calculate gives the test statistic and P-value.

Step 2 of 2

##### ISBN: 9780134133539

The answer to “?Calls to the Help Desk The phone calls to a computer software help desk occur at the rate of 2.1 per minute between 3:00 p.m. and 4:00 p.m. Compute the probability that the number of calls between 3:10 p.m. and 3:15 p.m. is(a) exactly eight. Interpret the result.(b) fewer than eight. Interpret the result.(c) at least eight. Interpret the result.” is broken down into a number of easy to follow steps, and 60 words. Since the solution to 12 from 6.3 chapter was answered, more than 223 students have viewed the full step-by-step answer. This full solution covers the following key subjects: . This expansive textbook survival guide covers 88 chapters, and 2422 solutions. This textbook survival guide was created for the textbook: Statistics: Informed Decisions Using Data, edition: 5. Statistics: Informed Decisions Using Data was written by and is associated to the ISBN: 9780134133539. The full step-by-step solution to problem: 12 from chapter: 6.3 was answered by , our top Statistics solution expert on 01/15/18, 03:19PM.

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Statistics: Informed Decisions Using Data : Inference about the Difference between Two Medians: Dependent Samples
?In Problems 3–10, use the Wilcoxon matched-pairs signedranks test to test the given hypotheses at the a = 0.05 level of significance. The dependent sa

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