Answer:
Approximately, the 90% confidence interval for the students' mean IQ score is between 129.045 - 130.956
Step-by-step explanation:
The formula to use to solve this question is called the Confidence Interval formula.
Confidence interval =
x ± z × ( σ/ (√n) )
Where:
x = the sample mean = 130
z = the z-value for 90% confidence = 1.645
σ = standard deviation = 7
n = sample size = 145
130 ± 1.645 × (7/√145)
130 ± 0.9562687005
130 - 0.9562687005 = 129.0437313
130 + 0.9562687005 = 130.9562687005
Therefore, approximately, the 90% confidence interval for the students' mean IQ score is between 129.045 - 130.956
I think 45 really sorry if I’m wrong
Answer:
The number of calories are directly proportional to the number of ounces.
Step-by-step explanation:
We can relate these values as:
Let x be the calories in 4 ounces of broiled hamburger.

=>
=> 
Dividing by 3 on both sides;
x = 327 approx
We can see that 4 ounces contain 327 calories.
Per ounce will have
calories.
As the quantity of hamburger increases, the calories count also increases.