1. The difference between the maximum and minimum observations in the sample is called
A. Sample Data
B. Sample Mean
C. Sample Range
D. Sample Interval
2. The area under the normal curve between z=0 and z=1 is ___ the area under the normal curve between z=1 and z=2.
A. Less than
B. Greater than
C. Equal to
D. A, B, or C above dependent on the value of the mean
E. A, B, or C above dependent on the value of the standard deviation
3. The width of a confidence interval will be:
A. Narrower for 99% confidence than 95% confidence
B. Wider for a sample size of 100 than for a sample size of 50
C. Narrower for 90% confidence than 95% confidence
D. Wider when the sample standard deviation(s) is small than when s is large.
E. None of the above.
4. Which statement is true?
A. The correlation analysis and regression analysis are not related and interchangeable
B. The correlation analysis and regression analysis are related but not interchangeable
C. The correlation analysis and regression analysis are related and interchangeable
D. All of the above
5. The management of White Industries is considering a new method of assembling its golf car. The present method requires 42.3 minutes, on the average, to assemble a cart. The mean assembly time for a random sample of 24 carts, using the new method, was 40.6 minutes, and the standard deviation of the sample was 2.7 minutes. Using the .10 level of significance, answer the following 2 questions:
a. What is the null and alternative hypothesis? is the assembly time using the new method faster?
A. H0: μ ≤ 42.3 H1: μ > 42.3
B. H0: μ = 42.3 H1: μ ≠ 42.3
C. H0: μ ≥ 42.3 H1: μ < 42.3
D. H0: μ ≤ 42.3 H1: μ < 42.3
b. Which of the following is a true statement (Use Q5) ?
A. Accept the null hypothesis
B. Accept the alternative hypothesis
C. The t value is -1.237
D. This is a two tailed test
A. the population is random
B. the population or sample is not normal or severely skewed
C. the population is interviewed by phone
D. non-parametric is not a branch of statistics
7. A pie chart shows the market shares of Cola products. The "slice" for Pepsi-Cola has a central angle of 90 degrees. What is their market share?
A. If the relationship describe by the regression equation is meaningful
B. How well the equation enables one to predict values of the dependent variable
C. How useful the predictions are for decision making
D. All of the above
9. The coefficient of correlation can be in the range:
A. Between 0 and +1 (including 0 and +1)
B. Between -1 and 0 (including -1 and 0)
C. Between -1 and +1 (excluding 0)
D. Between -1 and +1 (including -1 and +1)
10. What model is used for Forecasting?
11. What does the Z- test consist of?
A. Less than 30 samples
B. More than 30 samples
C. Equal to 30 samples
D. None of the above
12. A hypothesis is a statement about:
A. An experiment
B. A population
C. A sample
D. An evaluation of a reason
13. Your manager came to you to ask you to predict the sales volume for the next three months. Which tool would you utilize?
B. Chi-squared analysis
14. All of the following are possible forecasting tools for your stocks except:
A. Moving Average
B. Time Series
15. For a symmetrical, bell-shaped frequency distribution, what percent of the observation lie within + / - three standard deviations of the mean?
A. 68 %
B. 95 %
C. 99.7 %
16.Simple Linear Regression Analysis is best described as:
a. Multiple dependent variables are examined in relation to only one independent variable.
b. Multiple dependent variables are examined in relation to only multiple independent variables.
c. One dependent variable is examined in relation to only one independent variable.
d. One dependent variable is examined in relation to multiple independent variables.
Must create a clear explanation.
Tom is a resident of Massachusetts for the last 5 years. He wants to move to either Connecticut or New Jersey where the
median income is higher than Massachusetts. The table below shows the median income for three States for the last
five years. Prepare an ANOVA test using Excel and find out whether or not the median income among three States is
statistically significant. (Make sure your computer has Data Analysis option. If not, go to Tools,click Add-Ins,
check Access links and click ) PoPoints
Process, calculations, and detailed explanations needed.
Year Connecticut New Jersy Massachusets
2004 81,891 82,406 78,312
2003 82,517 80,577 80,247
2002 82,702 78,560 78,025
2001 75,505 75,425 71,689
2000 74,537 70,697 68,846
Explain the following:
17. Today Botox is the leading nonsurgical cosmetic treatment in the United States. According to statistics released by the American Society of Plastic Surgeons, more than 1.1 million people had Botox injections for wrinkles in 2002, a 31% increase over the previous year.
I must create comments on this statement (above) from what the student has learned from doing research and evaluation tests.
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The solutions answers of multiple choice questions from descriptive statistics, testing of hypothesis,ANOVA
Amino acids multiple choice questions
Which statement is incorrect about the classification of amino acids?
a. Alanine and valine are neutral, nonpolar amino acids.
b. Lysine and arginine are basic amino acids.
c. Tryptophan and phenylalanine are aromatic amino acids.
d. Aspartic acid and aspargine are acidic amino acids.
Which of the following amino acids is the least water soluble at pH 7.0?
b. Glutamic acid
Which amino acid would migrate the furthest toward the anode (positive electrode) during paper electrophoresis at pH 7.0?
a. Aspartic acid
Which of the following functional groups, attached to an inert matrix, could function as a cation exchanger?
Which of the following amino acids would make the best buffer at pH 4.5?
d. Aspartic acid
Which fact is incorrect about stereoisomers?
a. A diastereomer is a nonsuperimposable non-mirror image.
b. An enantiomer is a nonsuperimposible mirror image.
c. Diastereomers have different melting points.
d. Diastereomers rotate plane polarized light in equal but opposite direction.
Which statement is incorrect about L-isoleucine?
a. Its enantiomer is named O-isoleucine.
b. It contains a total of two asymmetric or chiral carbons.
c. It can also be named as (28, 38)-isoleucine using the (R,8) system.
d. Its diastereomer would be named O-alloisoleucine.
An isoelectric amino acid was dissolved in water and the resulting pH was approximately 7.6. What amino acid would possess this property?
b. Glutamic acid
What volume of NaOH is required to adjust the solution of monosodium aspartate to pH 9.8?
a. 1 ml
b. 2 ml
c. 3 ml
d. 6 ml or more
What volume of 2 N Hel is required to completely titrate the 4 mmol of monosodium aspartate?
a. 2 ml
d. 6 ml or more
Which statement is correct about the peptide ala-ser?
a. Alanine is at the N-terminal of the peptide.
b. There are a total six atoms that lie in the plane of the peptide bond linking alanine to serine.
c. The alpha-carbon of alanine is sp3 hybridized d All the above are correct statements.
What is the product formed from the acid hydrolysis of a simple amide?
a. Acid & base
b. Aldehyde & alcohol
c. Acid & amine
d. Ester & alcohol
The complete acid hydrolysis of the peptide ala-gln-trp-ser would yield:
a. Ala, gin, trp, ser
b. Ala, glu, ser
c. Ala, glu, trp, ser
d. Ala. ser
Fibrous proteins, such as collagen, have which of the following properties?
a. Highly soluble in water
b. Their hydrophilic residues are directed into the interior of the protein
c. Exhibit enzymatic activity
d. Serve structural roles in the cell
Quaternary structure is associated with:
a. The overall shape of a polypeptide chain
b. The sum of the secondary and tertiary interactions
c. Simple proteins with only one subunit
d. The relative orientation of one polypeptide to another polypeptide in a multi-subunit protein.
The information needed to define the structure of a protein is essentially contained in:
a. Amino acid composition
b. Amino acid sequence
c. Secondary structure
d. Tertiary structure.
Insulin is a polypeptide hormone that contains two short polypeptide chains linked by two interstrand disulfide bonds. The most logical order of events to perform in order to sequence this protein would be:
A: The peptides are reduced with mercaptoethanol.
B: The peptides are sequenced using Edman chemistry .
C: The peptides are separated by chromatography techniques. 0: The peptides are alkylated with iodoacetamide.
a. A, D,C, B b.C,A, 0, B
c. C, B, A, 0
d. A, B, C, 0
Which statement is incorrect about the peptide val-asp-trp-asn-ser?
a. This peptide would show a strong absorption band at 280 nm.
b. Reaction with chymotrypsin would yield two peptides.
c. To synthesize this peptide using the solid phase method of Merrifield, the amino acid directly attached to the resin would be serine.
d. After the second round of Edman chemistry using the reagent PITC, the PTH -amino acid residue released would be PTH-asn.
Which statement is incorrect about the reaction of the peptide ser-Iys-asp-trp-cys-metasn-phe-ala with the following reagents?
a. Reaction with cyanogens bromide would yield two peptides.
b. Reaction with trypsin would result in three peptides. The smallest of three peptides would have the highest pi of the three.
c. Reaciton with chymotrypsin would result in the peptides ser-Iys-asp & try-cys-met-Iysasn-phe-ala .
d. Reaction with chymotrypsin would yield a different set of peptides that overlap those obtained with tryspsin
Determine the amino acid sequence of the following oligopeptide from the experimental data below:
The amino acid composition is found the be ala, Iys, phe, met, cys plus some
2. The peptide has a molecular weight around 700 Da and absorbs at 280 nm.
3. Treatment with carboxypeptidase results in tryptophan and a peptide.
4. CNBr treatment yields a tetrapeptide and a dipeptide.
5. Trypsine digestion produces an amino acid and a pentapeptide with met on the amino end.
6. Chymotrypsin digestion yields a dipeptide and a tetrapeptide.
d. Iys-ala-cys-phe-met -trp