Choose the correct answers:

1. When estimating intervals, a 99% confidence interval will result in a z value of:

a.1.645

b.2.33

c.2.575

d.1.96

2. Which of the following t - values would be used to estimate a 95% confidence interval where n = 20.

a.4.541

b.1.740

c.2.086

d.2.093

3. An estimator that makes inferences about a population by estimating the value of an unknown population parameter using an interval is known as an:

a.Point Estimator

b.Standard Deviation

c.Variance

d.Interval Estimator

4. The number of students in a college is estimated to be within 10 students with a 99% confidence interval. If the number of students is normally distributed with a standard deviation of 5, what is the sample size?

a.6

b.1

c.8

d.2

5. The researcher inspects the amount of time it takes to produce t-shirts in a garment factory. A sample of 49 t-shirts is drawn and where the sample mean is 17.1 minutes and the sample standard deviation is 2.1 minutes. From this information, which of the following is a 99% confidence interval for the mean number of t-shirts produced?

a.24.56 and 16.88

b.13.35 and 18.99

c.16.30 and 17.90

d.17.87 and 16.33

6. In hypothesis testing, the ___________ hypothesis represents what is to be investigated.

a.Calculated

b.Alternative

c.Double

d.Null

7. If the p-value is between 1% and 5%, there is ___________ evidence that supports the alternative hypothesis.

a.Weak

b.Strong

c.Overwhelming

d.No

8. Refer to the following hypothesis:

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