WPC 300 Quiz 3

what is the confidence interval when the level of significance is 0.06?

0.940

The WPC Sports Company has noted that the size of individual "customer order" is normally distributed with a mean of $100 and a standard deviation of $10. if a soccer team of 25 players was to make the next batch of orders, what would be the standard error of the mean?

2.00

Which of the following proposition describes an existing. theory or belief?

Null hypothesis

When sample size increases

confidence interval decreases

The central limit theorem states that if the population is normally distributed, then the

sampling distribution of the mean will also be normal for any sample size

you arrived at a significant test statistic (p-value < 0.05) when comparing responses from three treatment groups in a one-way ANOVA. How would you interpret the alternative hypothesis for this test?

the mean response from at least one treatment group is different from that of the others

Which of the following is not a continuous random variable?

the outcomes of rolling two dice

Which of the following is a difference between the t-distribution and the standard normal (z) distribution?

the t-distribution has a larger variance than the standard normal distribution

In order to reject the null hypothesis, the p-value must be less than the

Alpha

Which of the following is a Type-II error?

The research hypothesis is actually true, and the test incorrectly fails to reject the null hypothesis