Te shelf life (duration until the expiration date in months) of certain ointment is known to have a normal distribution. a sample of size 120 tubes of ointment gives x = 36.1 and s = 3.7.
a. construct a 95% confdence interval of the population mean shelf life.
b. suppose a researcher believed before the experiment that 4 σ = . what would be the required sample size to estimate the population mean to be within 0.5 month with 99% confdence?

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

Hannah paid $3.20 for 16 ounces of potato chips. hank paid $3.23 for 17 ounces of potato chips. who paid less per ounces?

Use the following statements to write a compound statement for the conjunction or disjunction. then find its truth value. p: an isosceles triangle has two congruent sides. q: a right angle measures 90° r: four points are always coplanar. s: a decagon has 12 sides. a) a right angle measures 90° or an isosceles triangle has two congruent sides; true. b) a right angle measures 90° and an isosceles triangle has two congruent sides; true. c) a right angle measures 90° and an isosceles triangle does not have two congruent sides; false. d) a right angle measures 90° or an isosceles triangle does not have two congruent sides; true.