Math Problem Statement

According to a​ study, 58​% of college freshmen in 2011 had been accepted by their​ first-choice college. A group of six freshmen are selected at random. The histogram to the right shows that the values of ​Pr(Xequals2​) and ​Pr(Xequals5​) are close. How much more likely are 5 acceptances​? -1 0 1 2 3 4 5 6 7 0 0.2 0.4 x y

A histogram has a horizontal x-axis labeled from negative 1 to 7 in increments of 1 and a vertical y-axis labeled from 0 to 0.40 in increments of 0.20. The histogram contains vertical bars of width 1, where one vertical bar is centered over each of the horizontal axis tick marks. The heights of the vertical bars are as follows, where the horizontal axis label is listed first and the height is listed second: 0, 0.01; 1, 0.05; 2, 0.16; 3, 0.29; 4, 0.3; 5, 0.17; 6, 0.04. Question content area bottom Part 1    enter your response here ​(Type an integer or decimal rounded to four decimal places as​ needed.)

Solution

To find how much more likely 5 acceptances are compared to 2 acceptances, we calculate the difference between their probabilities based on the histogram values.

Given probabilities from the histogram:

  • P(X=5)=0.17P(X = 5) = 0.17
  • P(X=2)=0.16P(X = 2) = 0.16

Difference:

P(X=5)P(X=2)=0.170.16=0.01P(X = 5) - P(X = 2) = 0.17 - 0.16 = 0.01

Interpretation:

The probability of getting 5 acceptances is 0.01 (or 1%) more likely than getting 2 acceptances.

Let me know if you want further clarification or have additional questions! Here are 5 questions related to this topic for further exploration:

  1. How would the probabilities change if the selection were not random?
  2. What is the probability of at least 4 acceptances out of 6 freshmen?
  3. How does the histogram distribution indicate if this is a binomial distribution?
  4. What is the expected number of acceptances among the 6 students?
  5. How would the probabilities change if the acceptance rate increased to 70%?

Tip: For binomial probability problems, the formula P(X=k)=(nk)pk(1p)nkP(X = k) = \binom{n}{k} p^k (1-p)^{n-k} is essential!

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Math Problem Analysis

Mathematical Concepts

Probability
Binomial Distribution
Histogram Interpretation

Formulas

Binomial Probability Formula: P(X = k) = (n choose k) * p^k * (1-p)^(n-k)

Theorems

Binomial Theorem

Suitable Grade Level

Grades 10-12