STATISTICS 2023
NAME, PRINT IN INK______________________________
FINAL EXAM
SIGNATURE, IN INK_______________________________
FALL 2003
SS or OSU ID #, IN INK_____________________________
TRUE OR FALSE. Answer with a capital T or F.
(3 points each)
______ 1. If the z score is 1.5 for an individual data value from a population with mean of
25 and standard deviation of 6 then the individual data value is equal to 16.
______ 2. Continuous random variables have probability only on specific values of the
variables.
______ 3. The probability density function for the normal distribution is a left skewed
distribution with only positive values.
______ 4. The point estimate for the population mean is the center of a confidence interval
to estimate the population mean.
______ 5. The pvalue in a hypothesis test is the tail area associated with the rejection
region of the hypothesis test and is set by the researcher before the data are collected.
______ 6. The tmultiplier in the bound of error for a 99% confidence interval to estimate
the mean of a population with unknown variance based on only 10 observations would be
the value 2.821, not 3.250.
______ 7. If a null hypothesis is true, then the distribution of the test statistic is known and
the pvalue measures the likelihood of a test statistic at least as extreme as the one
calculated from the data.
STATE THE ANSWER.
Write the answer on the line.
(3 points each)
______________
8
.
What is the P(t > 3.610) if df = 18?
______________
9.
State the value of t
o
, if the P(t > t
o
) = .95 and the df = 26.
_____________
10.
What is the P(  2.821 < t < 2.821) if df = 9?
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STATISTICS 2023
FINAL EXAM
FALL 2003
PAGE TWO
STATE THE ANSWER.
Write the answer on the line.
(3 points each)
_______________ 11. If a 95% confidence interval based on a large sample to estimate a
population mean is (129.21, 172.33) then what is the value of the standard error of the
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 Spring '08
 Ripol
 Statistics, Normal Distribution, Standard Deviation, Variance, researcher, numerical value

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