BUAL 2650 EXAM 1 QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++

BUAL 2650 EXAM 1 QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ Practice questions for this set A standard normal distribution has a mean of and standard deviation of ________. 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. greater than DF = n - 1 P(z2.13)= 0.9834 P(z1.5)= 0.0668 P(-1z1)= 0.6826 _ is rejecting H0 when H0 is true. 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. 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. the z (normal) distribution what is the central limit theorem? the sampling distribution of any statistic will be normal or nearly normal, if the sample size is large enough