A student measured the lead content of a paint sample 4 times. The standard deviation of the measurements was found to be 0.76% of the average. Calculate the confidence interval at the 90% confidence level.

Step-by-step explanation:

From the question we are told that:

Sample size

Standard deviation

Confidence level

Degree of Freedom

Therefore

Test T from table is given

Generally the equation for Confidence interval CI is mathematically given by

in mathematics, a function is a relationship between two variables such that the value of one of the variables, called the dependent variable, is determined by the value of the other variable, called the independent variable. there is a specific term we use to describe the set of independent variables of a function.

answer;

the correct answer

just use google you beautiful person.

have a nice day < 3