In a large city, commuter trains are used to transport people into the downtown area. Trains arrive many times a day to a downtown station. While most are on time, some are late. The table shows on-time data from the past week. Train Status
On Time Late Total
Day of the Week Monday 32 8 40
Tuesday 24 16 40
Wednesday 37 3 40
Thursday 29 11 40
Friday 30 20 50
Total 152 58 210
What proportion of trains were late on Tuesday?

StartFraction 8 Over 40 EndFraction
StartFraction 58 Over 210 EndFraction
StartFraction 16 Over 40 EndFraction
StartFraction 24 Over 40 EndFraction

50.6

step-by-step explanation:

c is the answer

step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;

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