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Chapter 5
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Preguntas del test (18)
1If your exam score is X = 60, which set of parameters would give you the best grade?
- Aμ = 65 and σ = 5
- Bμ = 65 and σ = 2
- Cμ = 70 and σ = 5
- Dμ = 70 and σ = 2
2For a distribution of exam scores with μ = 70, which value for the standard deviation would give the highest grade to a score of X = 75?
- ASD = 1
- BSD = 2
- CSD = 5
- DSD = 10
3Last week Sarah had a score of X = 43 on a Spanish exam and a score of X = 75 on an English exam. For which exam should Sarah expect the better grade?
- ASpanish
- BEnglish
- CThe two grades should be identical.
- DImpossible to determine without more information.
4Of the following z-score values, which one represents the most extreme location on the left-hand side of the distribution?
- Az = +1.00
- Bz = +2.00
- Cz = -1.00
- Dz = -2.00
5Of the following z-score values, which one represents the location closest to the mean?
- Az = +0.50
- Bz = +1.00
- Cz = -1.00
- Dz = -2.00
6For a population with μ = 100 and σ = 20, what is the z-score corresponding to X = 105?
- A+0.25
- B+0.50
- C+4.00
- D+5.00
7A population of scores has μ = 44. In this population, an X value of 40 corresponds to z = −0.50. What is the population standard deviation?
- A2
- B4
- C6
- D8
8A population of scores has σ = 4. In this population, an X value of 58 corresponds to z = 2.00. What is the population mean?
- A54
- B50
- C62
- D66
9A population of scores has σ = 10. In this population, a score of X = 60 corresponds to z = −1.50. What is the population mean?
- A-30
- B45
- C75
- D90
10A population with μ = 85 and σ = 12 is transformed into z-scores. After the transformation, the population of z-scores will have a standard deviation of _____.
- Aσ = 12
- Bσ =1.00
- Cσ = 0
- DCannot be determined from the information given.
11A population has μ = 50 and σ = 10. If these scores are transformed into z-scores, the population of z-scores will have a mean of ____ and a standard deviation of ____.
- A50 and 10
- B50 and 1
- C0 and 10
- D0 and 1
12Which of the following is an advantage of transforming X values into z-scores?
- AAll negative numbers are eliminated.
- BThe distribution is transformed to a normal shape.
- CAll scores are moved closer to the mean.
- DNone of the other options is an advantage.
13For a sample with M = 60 and s = 8, what is the z-score corresponding to X = 62?
- A2
- B4
- C0.25
- D0.50
14For a sample with a standard deviation of s = 5, what is the z-score corresponding to a score that is located 10 points below the mean?
- A-10
- B+2
- C-2
- DCannot answer without knowing the mean.
15If a sample with M = 60 and s = 8 is transformed into z-scores, then the resulting distribution of z-scores will have a mean of ______ and a standard deviation of _____.
- A0 and 1
- B60 and 1
- C0 and 8
- D60 and 8 (unchanged)
16In N = 25 games last season, the college basketball team averaged μ = 74 points with a standard deviation of σ = 6. In their final game of the season, the team scored 90 points. Based on this information, the number of points scored in the final game was _____.
- AA little above average.
- BFar above average.
- CAbove average, but it is impossible to describe how much above average.
- DThere is not enough information to compare last year with the average.
17Under what circumstances would a score that is 15 points above the mean be considered to be near the center of the distribution?
- AWhen the population mean is much larger than 15.
- BWhen the population standard deviation is much larger than 15.
- CWhen the population mean is much smaller than 15.
- DWhen the population standard deviation is much smaller than 15.
18Under what circumstances would a score that is 20 points above the mean be considered to be an extreme, unrepresentative value?
- AWhen the population mean is much larger than 20.
- BWhen the population standard deviation is much larger than 20.
- CWhen the population mean is much smaller than 20.
- DWhen the population standard deviation is much smaller than 20.
Información
- Descripción
- Year 1 Statistics I Test sobre Chapter 5, creado por Eloise Brisson el 24/08/2022.
- Autor
- Eloise Brisson
- Idioma
- English
- Visitas
- 2
- Etiquetas
- Valoración
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