BUAL 2650 Exam 1 QUESTIONS WITH ANSWERS

BUAL 2650 Exam 1 QUESTIONS
WITH ANSWERS

A standard normal distribution has a mean of ________ and
standard deviation of ________. - CORRECT ANSWERS ✔✔zero,
one


The area under the normal curve between z = 0 and z = 1 is
________ the area under the normal curve between z = 1 and z = 2. -
CORRECT ANSWERS ✔✔greater than


DF = - CORRECT ANSWERS ✔✔n - 1


P(z<2.13)= - CORRECT ANSWERS ✔✔0.9834


P(z>1.5)= - CORRECT ANSWERS ✔✔0.0668


P(-1<z<1)= - CORRECT ANSWERS ✔✔0.6826


________ is rejecting H0 when H0 is true. - CORRECT ANSWERS
✔✔a type 1 error

, When the population is normally distributed, population standard
deviation σ is unknown, and the sample size is n = 15, the
confidence interval for the population mean μ is based on
___________
◦ the z (normal) distribution.
◦ the binomial distribution.
◦ the Poisson distribution.
◦ the t distribution. - CORRECT ANSWERS ✔✔the t distribution


When the population is normally distributed, population standard
deviation σ is known, and the sample size is n = 50, the confidence
interval for the population mean μ is based on ___________
◦ the z (normal) distribution.
◦ the binomial distribution.
◦ the Poisson distribution.
◦ the t distribution. - CORRECT ANSWERS ✔✔the z (normal)
distribution


what is the central limit theorem? - CORRECT ANSWERS ✔✔the
sampling distribution of any statistic will be normal or nearly
normal, if the sample size is large enough