One hundred offices need to be painted .The workers choose between yellow ,blue or beige. They decide that 45% of the offices wi
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In the first question,
Total no. of classmates(asked by Theresa for vote)=n= 100
no. of classmates who say yes= 62
proportion= p = 62/100 = 0.62
To find the 95% confidence interval use the formula,
here,
1-α=95%
1-α=0.95
α(significance level)=0.05
α/2= 0.025
From statistics table,
At α/2=0.025 z value is 1.96
By putting the values in above equation,
=(0.5249, 0.715)
In the second question,
Total no. of highways=n= 125
no. of highways need to be repair= 75
proportion= p = 75/125 = 0.6
To find the 99% confidence interval use the formula,
here,
1-α=99%
1-α=0.99
α(significance level)=0.01
α/2= 0.005
From statistics table,
At α/2=0.005 z value is 2.576
By putting the values in above equation,
=(0.4871, 0.7129)
Total no. of classmates(asked by Theresa for vote)=n= 100
no. of classmates who say yes= 62
proportion= p = 62/100 = 0.62
To find the 95% confidence interval use the formula,
here,
1-α=95%
1-α=0.95
α(significance level)=0.05
α/2= 0.025
From statistics table,
At α/2=0.025 z value is 1.96
By putting the values in above equation,
=(0.5249, 0.715)
In the second question,
Total no. of highways=n= 125
no. of highways need to be repair= 75
proportion= p = 75/125 = 0.6
To find the 99% confidence interval use the formula,
here,
1-α=99%
1-α=0.99
α(significance level)=0.01
α/2= 0.005
From statistics table,
At α/2=0.005 z value is 2.576
By putting the values in above equation,
=(0.4871, 0.7129)