QMB3200 EXAM COMPLETE ALL
QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED
A+||BRAND NEW!!
The standard deviation of a point estimator is the - Answer- standard error
Cluster sampling is - Answer- a probability sampling method
The interquartile range is the difference between the - Answer- first and third quartiles
A __________ can be used to graphically present quantitative data. - Answer- both a
histogram and a stem-and-leaf display are correct
The measure of variability easiest to compute, but seldom used as the only measure, is
the - Answer- Range
As the sample size increases, the variability among the sample means - Answer-
decreases
In a standard normal distribution, the range of values of z is from - Answer- minus
infinity to infinity
The t value with a 95% confidence and 24 degrees of freedom is - Answer- 2.064
The number of customers that enter a store during one day is an example of - Answer-
a discrete random variable
Quantitative data that measure how many are ________; quantitative data that measure
how much are ________. - Answer- discrete; continuous
Exhibit 2-3
The number of sick days taken (per month) by 200 factory workers is summarized
below.
Number of Days
Frequency
0-5
, 120
6 - 10
65
11 - 15
14
16 - 20
1
Refer to Exhibit 2-3. The midpoint of the first class is - Answer- 2.5
For the standard normal probability distribution, the area to the left of the mean is -
Answer- 0.5
Convenience sampling is an example of - Answer- a nonprobability sampling technique
A p-value is the - Answer- Probability, when the null hypothesis is true, of obtaining a
sample result that is at least as unlikely as what is observed
A Type II error is committed when - Answer- a true alternative hypothesis is mistakenly
rejected
If a hypothesis is not rejected at a 5% level of significance, it will - Answer- also not be
rejected at the 1% level
Data collected at the same, or approximately the same, point in time are - Answer-
cross-sectional data
The level of significance in hypothesis testing is the probability of - Answer- Rejecting a
true null hypothesis
Z is a standard normal random variable. The P(1.05 £ z £ 2.13) equals - Answer-
0.1303
The standard deviation is the - Answer- positive square root of the variance
__________ is a spreadsheet package. - Answer- Microsoft Excel
If a hypothesis test leads to the rejection of the null hypothesis, a - Answer- Type I error
may have been committed
A researcher has collected the following sample data.
QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED
A+||BRAND NEW!!
The standard deviation of a point estimator is the - Answer- standard error
Cluster sampling is - Answer- a probability sampling method
The interquartile range is the difference between the - Answer- first and third quartiles
A __________ can be used to graphically present quantitative data. - Answer- both a
histogram and a stem-and-leaf display are correct
The measure of variability easiest to compute, but seldom used as the only measure, is
the - Answer- Range
As the sample size increases, the variability among the sample means - Answer-
decreases
In a standard normal distribution, the range of values of z is from - Answer- minus
infinity to infinity
The t value with a 95% confidence and 24 degrees of freedom is - Answer- 2.064
The number of customers that enter a store during one day is an example of - Answer-
a discrete random variable
Quantitative data that measure how many are ________; quantitative data that measure
how much are ________. - Answer- discrete; continuous
Exhibit 2-3
The number of sick days taken (per month) by 200 factory workers is summarized
below.
Number of Days
Frequency
0-5
, 120
6 - 10
65
11 - 15
14
16 - 20
1
Refer to Exhibit 2-3. The midpoint of the first class is - Answer- 2.5
For the standard normal probability distribution, the area to the left of the mean is -
Answer- 0.5
Convenience sampling is an example of - Answer- a nonprobability sampling technique
A p-value is the - Answer- Probability, when the null hypothesis is true, of obtaining a
sample result that is at least as unlikely as what is observed
A Type II error is committed when - Answer- a true alternative hypothesis is mistakenly
rejected
If a hypothesis is not rejected at a 5% level of significance, it will - Answer- also not be
rejected at the 1% level
Data collected at the same, or approximately the same, point in time are - Answer-
cross-sectional data
The level of significance in hypothesis testing is the probability of - Answer- Rejecting a
true null hypothesis
Z is a standard normal random variable. The P(1.05 £ z £ 2.13) equals - Answer-
0.1303
The standard deviation is the - Answer- positive square root of the variance
__________ is a spreadsheet package. - Answer- Microsoft Excel
If a hypothesis test leads to the rejection of the null hypothesis, a - Answer- Type I error
may have been committed
A researcher has collected the following sample data.
