Mathematics, 13.04.2021 04:20 ranaaf
In 1980 more than 35% of cars purchased had a manual transmission (i. e. stick shift). By 2007 the proportion had decreased to 7.7%. A random sample of college students who owned cars revealed the following: out of 133 cars, 31 had stick shifts. Estimate the proportion of college students who drive sticks with 90% confidence. Use a graphing calculator and round the answers to at least three decimal places. <
Answers: 2
, and a confidence level of 
, we have the following confidence interval of proportions.
.
, z is the value of Z that has a pvalue of 
, so 
. 
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In 1980 more than 35% of cars purchased had a manual transmission (i. e. stick shift). By 2007 the p...
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