Math  /  Data & Statistics

Question```latex A college has a total enrollment of 2445 students, and 469 of them are left-handed. Use the graph below to determine the probability that a survey of 50 students will find that 9 or fewer students are left-handed.
Use the graph below to calculate the probability that the sampling distribution will have a mean number of left-handed students less than or equal to 9:
1. Drag and move the blue dot to select the appropriate probability graph area from the four options on the left. (Note there are four graphs available to choose from. Only select between less than, greater than, and area between graphs.);
2. Use the Central Limit Theorem to find p^\hat{p} and σp^\sigma_{\hat{p}};
3. Calculate the zz-score for p^\hat{p} and move the slider along the xx-axis to the appropriate zz-score;
4. The purple area under the curve represents the probability of the event occurring. Interpret the purple area under the curve.

Remember, do not round any values or change fractions to approximated decimals during calculations. Only round zz-scores and final answers to two decimal places.
Move the blue dot to choose the configuration
The user took a picture with their phone and the text was extracted above. The user then had a dialogue with an AI Assistant to help clarify the instructions.
Dialogue Transcript:
assistant: Hello! It seems like there's some information missing that's necessary to solve the problem. Specifically, it looks like there's a reference to a graph that's not included in the text. Could you please describe the graphs or provide more details about the options available for selecting the probability graph area? Once you provide that, I can help guide you through solving the problem step-by-step.
user: I uploaded an image and extracted the following: * Text: Provide your answer below: p=p= \square p^=\hat{p}= \square σp^=\sigma_{\hat{p}}= \square z=z= \square P(X9)=P(X \leq 9)= \square ```

Studdy Solution

STEP 1

1. The probability of a student being left-handed is calculated using the ratio of left-handed students to the total number of students.
2. The sampling distribution of the proportion of left-handed students can be approximated using the Central Limit Theorem.
3. The problem involves calculating the probability that 9 or fewer students out of a sample of 50 are left-handed.
4. The z-score is used to find the probability associated with the sample proportion.

STEP 2

1. Calculate the population proportion of left-handed students.
2. Use the Central Limit Theorem to find the sample proportion and standard deviation.
3. Calculate the z-score for the sample proportion.
4. Determine the probability using the z-score.

STEP 3

Calculate the population proportion p p :
p=4692445 p = \frac{469}{2445}

STEP 4

Calculate the sample proportion p^ \hat{p} for 9 left-handed students out of 50:
p^=950 \hat{p} = \frac{9}{50}

STEP 5

Calculate the standard deviation of the sample proportion σp^ \sigma_{\hat{p}} :
σp^=p(1p)n \sigma_{\hat{p}} = \sqrt{\frac{p(1-p)}{n}}
where n=50 n = 50 .

STEP 6

Calculate the z-score for p^ \hat{p} :
z=p^pσp^ z = \frac{\hat{p} - p}{\sigma_{\hat{p}}}

STEP 7

Use the z-score to find the probability P(X9) P(X \leq 9) from the standard normal distribution table.
The probability that a survey of 50 students will find that 9 or fewer students are left-handed is represented by the purple area under the curve.

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