1,010 Answered Questions for the topic Statistics Question

Statistics Question

09/02/14

In a distribution with a standard deviation of eight, an individual score of 42 corresponds to a Z score of -0.5. What is the mean of this distribution?
Statistics
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Statistics Question

08/27/14

How should a probability value of p = .1 should be interpreted?
Which is the correct answer?  a)The event occurs about one time in every 10.b)The event occurs about one time in every 100.c)The event occurs about one time in every thousand.d)The event occurs... more
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Statistics Question

08/20/14

WHAT WILL HAPPEN IF WE ARE THROWING A TENNIS BALL AT CENTERE OF THE EARTH?
WHAT WILL HAPPEN IF WE ARE THROWING A TENNIS BALL AT CENTERE OF THE EARTH?
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Statistics Question Statistics Stats

08/13/14

In an Analysis of variance (ANOVA) with four groups, each containing 15 respondents, calculate the between groups' degrees of freedom?
Choose one of the following:   A) 15 B) 14 C) 4 D) 3
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Statistics Question Statistics Stats

08/13/14

The larger the value of the calculated F-ratio?
Choose one of the following:   A) the less likely an observed difference is due to chance B) the more likely an observed difference is due to chance C) the larger the sum of squares - within... more
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Statistics Question Statistics Stats

08/13/14

In a one-way ANOVA with three groups, the null hypothesis states?
Choose one of the following:   A) at least two of the means differ B) μ1=μ2=μ3 C) μ1≥ μ2 and μ3 D) there exists in the set of i and j at least one value for which μi and μj are not equal E)... more
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Statistics Question Statistics Stats

08/13/14

which of the following is/are required for computing the F-ratio?
Choose one of the following:   A) a normal distribution B) equal variances C) random sampling D) all of the above
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Statistics Question Statistics Stats

08/13/14

The deviation of variaton of group means from one another is referred to as which variation?
Choose one of the following:    A) total B) within group C) partial D) between group
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Statistics Question Statistics Stats

08/12/14

In an Analysis of variance (ANOVA) with four groups, each containing 15 respondents, calculate the total degrees of freedom
A) 60B) 59C) 56D) 42
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Statistics Question Statistics Stats

08/12/14

In an Analysis of variance (ANOVA) with four groups, each containing 15 respondents, calculate the within groups' degrees of freedom
A) 60 B) 59 C) 56 D) 42
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Statistics Question Statistics Stats

08/12/14

It is advantageous to use analysis of variance rather than the t ratio when more than two groups are involved because:
A) analysis of variance is easier to calculate B) multiple t-tests increase the risk of a type l error C) both A and B D) none of the above
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Statistics Question Statistics Stats

08/12/14

If we reject the null hypothesis when we should have failed to reject we have
A)made the correct decision B)made a type l error C)made a type 2 error D) none of the above
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Statistics Question Statistics Stats

08/12/14

A warden is interested in the ability of two different violence reduction programs to reduce violent interaction in her prison.
To test for difference randomizes two groups implementing one program to each group(six members are in each group). The warden got a tobtained value of 2.7 a =.05, is there a difference between... more
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Statistics Question Statistics Stats

08/12/14

When the null hypothesis is rejected
A) it is unlikely that the difference is a result of chance B) the research hypothesis is proven to be false C) the population means are equal D) the t value in the table is greater than the... more
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Statistics Question

08/09/14

a random sample of 40 students has a test score average with a standard deviation of 11.1. Find the margin of error c=0.98
A random sample of 40 students has a test score average with a standard deviation of 11.1.  find the margin of error c=0.98
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Statistics Question

08/05/14

a)explain how to interpret the result of this study and make a conclusion. b) what does the phrase "the confidence level for this study is 95% mean?
For the confidence interval ($61,$97), indentify the mean and margin of error.  A sample population of 300 subjects was selected by taking a simple random sample of lunch reciepts from the colleges... more
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Statistics Question

08/04/14

find the sample mean and standard deviation
find a sample mean and  sample standard deviation for the data set of 41, 37, 57, 47, 31, 31, 41, 37, 57,27,47,41,45
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Statistics Question

08/04/14

help me please
A 28-year-old man pays $165 for a one-year life insurance policy with coverage of $140,000. If the probability that he will live through the year is 0.9994, what is the expected value for the... more
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Statistics Question

08/01/14

Statistics help
You do not need to type in the formulas. Indicate the n and p for the Binomial setting and describe the steps taken to solve the problem   The Federal Bureau of Investigation (FBI) trains sniffer... more
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Statistics Question

07/19/14

See below.
An experiment tests whether or not dogs can detect cancer by sniffing 7 urine vials, one of which was from a cancer patient. When the hypothesis is tested that the dogs randomly guess, H0: p = 1/7,... more
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Statistics Question Statistics

07/16/14

how do i find this answer
During September, the average temperature of Laurel Lake is 64.2° and the standard deviation is 3.2°. Assume the variable is normally distributed. For a randomly selected day in September, find the... more
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Statistics Question Statistics

07/14/14

The mean consumption of beef at the turn of the century was 70 pounds per person per year in the US. A sample of 32 people taken this year yielded the followin
The mean consumption of beef at the turn of the century was 70 pounds per person per year in the US.  A sample of 32 people taken this year yielded the following data, in pounds, on last years beef... more
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Statistics Question

07/03/14

What is the relevant statistic?
In an August 2012 Gallup survey of 1,012 randomly selected U.S. adults (age 18 and over), 53% said that they were dissatisfied with the quality of education students receive in kindergarten through... more
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Statistics Question

06/19/14

Need help with statistic Question (Please show all steps)
A variable is normally distributed with mean 68 and standard deviation 10. Find the percentage of all possible values of the variable that:a. Lie between 73 and 80b. Are at most 90
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Statistics Question

06/19/14

Need help with statistic Question
Determine the area under the standard normal curve that lies between:a. -0.88 and 2.24b. -5.1 and 1
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