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# Statistics Multiple Choice Questions

1. Only two doctors would make a diagnosis on patients coming into the same STD clinic for gonorrhea. The probability of the two doctors making a diagnosis of gonorrhea is (independent, dependent, synergistic, cannot tell).

2. Assume that birth weights are normally distributed with a mean of 3400g and a standard deviation of 700 g. If you want to find the probability that a birth weight will be less than or equal to 2000 g you would first normalize and set up the equation as:

3. Which confidence interval has the most variability?

a. (.0039, .0058)
b. (.009, .0058)
c. (1.20, 3.00)
d. they all have the same variability

4. A test statistic was calculated to be -1.6/ You need to determine critical values c1= t99,.025, c2=t99,975. Referring to a t table you see that 99 degrees of freedom is not in the table, but c2=t120,.975 = 1.980. You would _____ the Ho.

5. Determination of statistical significance can only be determined by calculating the exact p value and declaring results as significant. True or false?

6. You use an F test to test for unequal variances in two groups. You determine that the p value for the F test equals 0.70. You there conclude:

a. One sample has unequal variances
b. Two samples have unequal means
c. Two samples have equal variances
d. Cannot determine from information given

7. Suppose you fit a linear regression line to describe the variability of forced expiratory lung volume depending on a person's height. What statistical significance test would you use?

a. F test
b. X-Y test
c. Chi-square
d. None of the above

#### Solution Preview

1. Only two doctors would make a diagnosis on patients coming into the same STD clinic for gonorrhea.
The probability of the two doctors making a diagnosis of gonorrhea is (independent, dependent, synergistic, cannot tell).

Independent.
Since the doctors work independently of each other the probability is independent.

2. Assume that birth weights are normally distributed with a mean of 3400g and a standard deviation of 700 g.
If you want to find the probability that a birth weight will be less than or equal to 2000 g you
would first normalize and set up the equation as:
Z= (x-&#956;) / &#963; =( 2000-3400)/700= -2
P(Z)= 2.28%

3. Which confidence interval has the most ...

#### Solution Summary

The solution discusses 7 multiple choice questions on normal distribution, confidence interval, critical values, F test, statistical significance.

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