### Decision Making Casino Blues

Solution:
Let X_bar be the average amount **lost** **by** **a** passenger, then X_bar is **a** normal **random** variable, with mean **of** $182, and standard deviation **of** $105/ .

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Solution:
Let X_bar be the average amount **lost** **by** **a** passenger, then X_bar is **a** normal **random** variable, with mean **of** $182, and standard deviation **of** $105/ .

Statistics / Descriptive Statistics / Quantative Analysis of Data / Dispersion and Spread of Data / Standard Deviation » 205111

165120 Find the confidence interval Find the confidence interval **Amounts** **lost** **by** **gamblers** who took **a** bus to an Atlantic City casino: 99% confidence; n = 40, = $189, and is known to be $87.
Solution. You missed something.

Statistics / Hypothesis Testing / Frequentist Inference / Confidence Interval » 165120

13108 Estimating Number **of** Houses with **Lost** Power in **Random** **Sample** Estimating Number **of** Houses with **Lost** Power in **Random** **Sample** **a**.

Statistics / Data Collection / Survey Methodology / Sampling / Random Sampling » 13108

The confidence Interval is given **by**
= 65.48788 **lost** **by** **gamblers** who took **a** bus to an Atlantic City casino: 99% confidence; n =40, x=$189, s = $87.
= 151.7502 < Amount **Lost** < 226.2498
18.

Statistics / Hypothesis Testing / Frequentist Inference / Confidence Interval » 99365

The human resources department **of** Western Electronics has studied the distribution **of** time **lost** due to absenteeism **by** individual employees.

Statistics / Data Collection / Survey Methodology / Sampling » 257478

In symbols:
P(**A** or B) = P(**A**) + P(B) - P(**A** and B)
Example
**A** technology company wishing to market **a** new device contacts **a** **random** **sample** **of** its current customers to determine how many now use **a** pager or **a** cell phone.

Statistics / Probability » 289585

The human resources department **of** Western Electric Corporation has studied the distribution **of** time **lost** from absenteeism **by** individual employees. During **a** one-year period the department found **a** mean **of** 21 days and **a** standard deviation **of** 10 days.

Statistics / Data Collection / Survey Methodology / Sampling » 127034

The sales manager is interested in finding out whether there is **a** difference in the mean **amounts** charged **by** customers on the three cards. **A** **random** **sample** **of** 18 credit card purchases (rounded to the nearest dollar) revealed the following **amounts**.

Statistics / Hypothesis Testing » 85366

I would use **a** simple **random** **sample** collecting data from both genders, then only use the data from the gender I am interested in studying. **A** subset **of** **a** simple **random** **sample** would also be **random** in this case.

Statistics / Descriptive Statistics / Quantative Analysis of Data / Normal Distribution » 106417

, but in proportional **amounts** from each **of** those demographic groups.

Statistics / Descriptive Statistics » 561052