The average reading score on certain tests is given by y = 0.153x + 255.4, where x is the number of years past 1970. In what year would the average reading score be 259.378 if this model is accurate?
The average reading score would be 259.378 in (Type a whole number)

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step-by-step explanation:

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translate k to n and reflect across the line containing jk.

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;