Question 3 of 4 (10 points) In 1980 more than 35% of cars purchased had a manual

Question

Question 3 of 4 (10 points) In 1980 more than 35% of cars purchased had a manual transmission (ie, stick shift). By 2007 the proportion had decreased to 7.7%. A random sa ple of college students who owned cars revealed the following: out of 126 cars, 29 had stick shifts. Estimate the proportion of college students who drive sticks with 95% confidence. Round your answers to three decimal places. 7.3 Section Exercise 4 shin.ay con revealed the folowing eut t to 138%. A randonm st sphe fcels Source: www.pollingreport.com 20171026.15345ajpg

Explanation / Answer

The statistical software output for this problem is:

One sample proportion summary confidence interval:
p : Proportion of successes
Method: Standard-Wald

95% confidence interval results:

Hence,

95% confidence interval will be:

0.157 < p < 0.304

Proportion Count Total Sample Prop. Std. Err. L. Limit U. Limit p 29 126 0.23015873 0.037499808 0.15666046 0.303657

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