A researcher theorizes that first-born children are more intelligent than other children. A sample of 50 first-born children is found to have an average IQ of 105. The average IQ in the general population is 100 with a standard deviation of 15. Which statistic would you use to determine if first-born children significantly more intelligent than the general population

answerthe vertex form

step-by-step explanation:

i can't read the graph

step-by-step explanation:

i would need to see the dot plot : )

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;