Question

Label as True or False  

1. When the population standard deviation is known you can always use a critical Z value to construct a confidence interval__________
2. In a hypothesis test, if P > α then we reject H0__________
3. After calculating a minimum sample size you should always bump up to the next whole number for your final answer __________
4. In a hypothesis test, the type of test (left, right or two-tailed) is determined by inequality/equality symbol associated with the original claim____________
5. If no preliminary estimates for p or q are given then we always use p = 0.5 and                     q = 0.5 when determining a minimum sample size___________
6. In a hypothesis test failure to reject the null hypothesis means that we can thus accept the claim___________
7. When using the t-distribution chart degrees of freedom are determined by taking the sample mean and subtracting 1___________
8. The level of significance in a hypothesis test is denoted by α_________
9. Type 1 error occurs if the null hypothesis is not rejected when it is false_________
10. When performing a hypothesis test for a proportion we can use a normal distribution to approximate the sampling distribution as long as np ≥ 5. ________

Answer 1

When population standard deviation is known we use z distribution

So first one is True

If P<alpha, we reject H0

So this one is False

For sample size we round to the next number even if decimal is less than 0.5.

So answer is True

If p is not known, we take it as 0.5, so q=1-p=0.5

So answer here is True

In hypothesis if H0 is rejected, we have sufficient evidence to support the claim

So answer is False

For t distribution df=n-1

So answer is False

Level of significance is alpha

So answer is True

Type I error is rejection of true null hypothesis

So answer is False