stats

Question 5 of 10 A z-score of 2.0 is two standard deviations above the mean of the distribution (t).
True
False
I chose answer A

The z scores is a ratio of difference to variability (t).
True
False
I chose False

Question 6 of 10 What’s the probability that an individual, selected at random, will score below the mean on any normally distributed characteristic? (Points : 1)
p = 0
p = .1
p = .5
p = 1.0
I chose p=0

A statistically significant outcome in a z-test indicates which of the following? (Points : 1)
The sample is not characteristic of the population.
The sample could not have been randomly selected.
The sample is characteristic of the population.
The sample represents other samples in the original population.

I chose the last one
Question 8 of 10 A distribution where the mean and standard deviation have pre-determined values calls for ________. (Points : 1)
raw scores
z scores
modified standard scores
percentile rankings


I chose modified standard scores

Question 9 of 10 Which is true of a one-tailed test? (Points : 1)
The alternate hypothesis specifies the direction of difference.
The null hypothesis specifies the direction of difference.
There is no alternate hypothesis.
The null hypothesis becomes the research hypothesis.




I chose there is no alternate hyothesis

Question 10 of 10 What is the critical value of t for a two-tailed t-test in which n = 10? (Points : 1)
2.262
2.228
.05
.01
I chose .05

  1. 👍
  2. 👎
  3. 👁
  1. I'll help with the last two:
    9. The alternate hypothesis shows a specific direction in a one-tailed test.
    10. 2.262 (degrees of freedom would be n - 1)

    1. 👍
    2. 👎
  2. A statistically significant outcome in a z-test indicates which of the following? (Points : 1)
    The sample is not characteristic of the population.
    The sample could not have been randomly selected.
    The sample is characteristic of the population.
    The sample represents other samples in the original population.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    Which of the below data sets has the lowest standard deviation? You do not need to calculate the exact standard deviations to answer this question. 0, 1, 2, 3, 4, 5, 6 0, 25, 50, 100, 125, 150, 1000 0, 1, 3, 3, 3, 5, 6 0, 0, 0,

  2. statistics

    Question: If a distribution has a mean of 100 and a standard deviation of 15, what value would be +2 standard deviations from the mean? How would you go about solving this? Find the z-score of 2? I know that 95% (if i'm not

  3. university of phoenix

    if someone scored two standard deviations above the mean on a standard test where the mean =100 and the standard deviation = 15, what is the person's numerical score?

  4. Statistics

    The lifetimes of projector bulbs of a particular type are normally distributed with a mean of 470 hours and a standard deviation of 15 hours. What percentage of the bulbs has lifetimes that lie within 2 standard deviations of the

  1. Math

    In December 2010, the average price of regular unleaded gasoline excluding taxes in the United States was $3.06 per gallon, according to the Energy Information Administration. Assume that the standard deviation price per gallon is

  2. Elementary Statistics

    Heights of women have a bell-shaped distribution with a mean of 161 cm and a standard deviation of 7 cm. Using Chebyshev’s theorem, what do we know about the percentage of women with heights that are within 2 standard deviations

  3. statistics

    A maintenance supervisor is comparing the standard version of an instructional booklet with one that has been claimed to be superior. An experiment is conducted in which 26 technicians are divided into two groups, provided with

  4. maths

    Question 1 Which of the below data sets has the lowest standard deviation? You do not need to calculate the exact standard deviations to answer this question.

  1. Math

    Suppose a normal distribution has a mean of 20 and a standard deviation of 4. What is the z-score value 0.52. Its standard deviations is less than the mean? -0.13 0.13 help please

  2. psy

    Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the

  3. Statistics

    Across the USA, results for these exams are normally distributed. What does that mean and why is this the case? If you were to create a histogram of all GRE scores, what would you expect the histogram to look like? Would it be

  4. statistics

    Three students take equivalent stress tests. Which is the highest relative score? a. A score of 144 on a test with a mean of 128 and a standard deviation of 34. b. A score of 90 on a test with a mean of 86 and a standard deviation

You can view more similar questions or ask a new question.