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Multiple chioce question for statistics

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Using a three-month moving average, the forecast value for October made at the end of September in the following time series would be?

Question 14
Concerning the Express Delivery, Inc. problem statement, what is the value of the test statistic?
Solution:
Z = (50-48)/(4.9/sqrt(37)) = 2.482760216
2.18
2.48
2.68
-2.18
-2.48
None of the above is the correct answer.
Question 15
Concerning the Express Delivery, Inc. problem statement, ASSUMING that null hypothesis should be rejected, what statement can be made concerning the validity of claim made by Express Delivery, Inc.?
No conclusion can be drawn.
There is not enough information to answer this question.
The claim is not valid.
The claim is valid.
None of the above is the correct answer.

Please see attached for multiple choice homework, there are 67 questions.

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https://brainmass.com/statistics/regression-analysis/multiple-chioce-question-for-statistics-465239

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This solution is comprised of a detailed explanation of the answers of 67 multiple chioce questions.

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Finite math/business analysis
7 Multiple choice questions on statistics

1.Those methods involving the collection, presentation, and characterization of a set of data in order to properly describe the
various features of that set of data are called
a. statistical inference.
b. the scientific method.
c. sampling.
d. descriptive statistics.

2. Which of the following is most likely a parameter as opposed to a statistic?
a. The average score of the first five students completing an assignment.
b. The proportion of females registered to vote in a county.
c. The average height of people randomly selected from a database.
d. The proportion of trucks stopped yesterday that were cited for bad brakes.

3. Which of the following is not an element of descriptive statistical problems?
a. An inference made about the population based on the sample.
b. The population or sample of interest.
c. Tables, graphs, or numerical summary tools.
d. Identification of patterns in the data.

4. When studying the simultaneous responses to two categorical questions, we should set up a
a. contingency table.
b. frequency distribution table.
c. cumulative percentage distribution table.
d. Histogram.

5. A marketing research firm, in conducting a comparative taste test, provided three types of peanut butter to a sample of households randomly selected within the state. Which of the four methods of data collection is involved when people are asked to compare the three types of peanut butter?
a. Published sources
b. Experimentation
c. Surveying
d. Observation

6. Which descriptive summary measures are considered to be resistant statistics?
a. The mean and standard deviation.
b. The interquartile range and range.
c. The mode and variance
d. The median and interquartile range.

7. According to the empirical rule, if the data form a "bell-shaped" normal distribution, _______ percent of the observations will be contained within 1 standard deviation around the mean.
a. 68.26
b. 88.89
c. 93.75
d. 95.44

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