1,010 Answered Questions for the topic Statistics Question

Statistics Question

10/12/14

You plan to conduct a study where your nondirectional hypothesis will be assessed with a t test for independent means at the .05 significance level.
You plan to conduct a study where your nondirectional hypothesis will be assessed with a t test for independent means at the .05 significance level. Assuming that you will recruit 20 participants... more
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Statistics Question

10/12/14

If a person's score on a questionnaire has been found to predict observed social skills, and the linear prediction rule uses a regression constant of 16 ...
If a person's score on a questionnaire has been found to predict observed social skills, and the linear prediction rule uses a regression constant of 16 and a regression coefficient of 3, the... more
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Statistics Question

10/11/14

The standard deviation of the scores: 2, 0, 1, 8, and 4 is
The standard deviation of the scores: 2, 0, 1, 8, and 4 is
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Statistics Question

10/11/14

The raw score that corresponds to a Z score of 2.0 obtained from a distribution with a mean of 80 and a standard deviation of 10 is
The raw score that corresponds to a Z score of 2.0 obtained from a distribution with a mean of 80 and a standard deviation of 10 is
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Statistics Question Ratios

10/09/14

What is my ratio?
If I processed 6644 checks within 4 hours and had 10 process mistakes
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Statistics Question

10/07/14

Please answer ASAP
a manufacturer of automobile batteries claims that average length of life for its grade A battery is 70 months, suppose the standard deviation of the life length is known to be 10 months. a)... more
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Statistics Question Math Math Help Statistic

10/05/14

Stats Question
1)Rejecting the null hypothesis when the research hypothesis is false is a. effect size. b. power. c. a Type I error. d. a Type II error 2)Failing to reject the null hypothesis when the... more
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Statistics Question Math Statistics Math Help

10/05/14

Stats help Mult
1)In a t test for dependent means, 15 participants are each tested twice. This makes a total of 15 "before" scores and 15 "after" scores. What are the degrees of freedom? a. 15 b. 14 c. 30 d.... more
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Statistics Question Math

10/04/14

Statistics Problem
A researcher is interested in increasing feelings of self-confidence in adolescents. He randomly selects 100 adolescents from the population and randomly assigns 50 individuals to a treatment... more
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Statistics Question Math Help Ap Statistics Statastics

10/03/14

Stats Help Please Please
A sports psychologist gave a questionnaire about healthy eating habits to randomly selected professional athletes. The results are displayed below. Using the α =.05 significance level, is there a... more
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Statistics Question Statistics Math Help Ap Statistics

10/03/14

Stats Help help
1)You conducted a t test for independent means, and found that the t score equaled 0. This means that a. the two population means must be equal. b. the two population variances must be equal. c.... more
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Statistics Question Statistics Math Help Ap Statistics

10/03/14

Multiple Choice Question
The most likely way for a t test to be presented in a research article for a study with 25 participants is a. t (25) < significant b. t (25) = 3.01, p < .05 c. t (24) = 2.94, p <... more
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Statistics Question Statistics Math Help Ap Statistics

10/03/14

Statistics in Human Behavior
The mean of a self-worth measure in the population of adult males is 30.00. A researcher is interested in whether females report differing levels of self-worth. The researcher randomly samples 150... more
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Statistics Question

09/29/14

if you roll 80 dice, what is the probability of getting the number of 6's equal to 8?
if you roll 80 dice, what is the probability of getting the number of 6's equal to 8?
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Statistics Question Statistics Word Problems Math Help

09/29/14

Stats Help Please
A researcher is interested in increasing feelings of self-confidence in adolescents. He randomly selects 100 adolescents from the population and randomly assigns 50 individuals to a treatment... more
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Statistics Question

09/29/14

a random sample of 87 observations produced a mean=26.2 and a standard deviation s=2.5.find a95% confidence interval
a random sample of 87 observations produced a mean=26.2 and a standard deviation s=2.5 Find a 95% interval Find a 90% interval Find a 99% interval  
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Statistics Question

09/26/14

statistics question
a certain country the mean number of children in a household in the urban area is 3 with a standard deviation of 2. in the rural area the mean is 5 with a standard deviation of 1. a. which area... more
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Statistics Question

09/23/14

how would you give an estimate of the probability of a 25-year-old passing a driving test at a first attempt
please give my answer to this question i do not understand statistics
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Statistics Question Statistics Standardization

09/22/14

Standardization allows the researcher to:
Standardization allows the researcher to: (select all that apply) A. Identify errors in the data B. Normalize the data C. Compare the score to others scores in the distribution D. Compare... more
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Statistics Question Math Statistics Math Question

09/19/14

Deviation anxiety
A researcher is interested in comparing a new self-talk method for reducing anxiety in individuals who are “clinically anxious.” Assume the mean and standard deviation of this measure of anxiety... more
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Statistics Question Math Statistics Math Help

09/19/14

Population
 The general population (Population 2) has a mean of 30 and a standard deviation of 5, and the cutoff Z score for significance in a study involving one participant is 1.96. If the raw score... more
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Statistics Question Math Statistics Math Help

09/19/14

normally distributed
A population is normally distributed with μ = 50, σ = 8, N = 52. Answer the following questions based on this information. (show all work)  a. The mean of the distribution of means is ______ . b.... more
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Statistics Question Math Statistics Math Help

09/19/14

Principle, a distribution of means
1) In principal, a distribution of means can be formed by A) calculating the mean of all the possible samples of a given size and dividing it by the variance. B) using the sample's mean and... more
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Statistics Question

09/11/14

Statistics question?
An advertising firm wants to determine the effect of the length of a commercial and how frequently it is shown on the customers intent to buy a product. Are people more likely to buy a product... more
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09/09/14

Need help in solving these questions!
How do you solve these problems in Statistics? The topic is about Testing the Difference between two population means case of two independent samples. I really am finding it hard to solve these... more
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