You Have Arranged to Go Camping for Two Days in March.You

question 30

Multiple Choice

You have arranged to go camping for two days in March.You believe that the probability that it will rain on the first day is 0.5.If it rains on the first day,the probability that it also rains on the second day is 0.7.If it doesn't rain on the first day,the probability that it rains on the second day is 0.2.Let the random variable X be the number of rainy days during your camping trip.Find the expected value of X.

• A)μ = 1.05
• B)μ = 0.85
• C)μ = 1.2
• D)μ = 0.95
• E)μ = 0.8

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Definitions:

Margin of Error

A statistic expressing the amount of random sampling error in a survey's results, representing how far the true value could deviate from the observed value.

Minimum Sample Size

The smallest number of observations or data points that is considered sufficient for a statistically valid result.

Population Proportion

The fraction or percentage of a population that exhibits a particular attribute or characteristic.

Confidence Interval

A stretch of numerical indicators, obtained from sample statistics, envisaged to hold the secret value of a population characteristic.