14 Answered Questions for the topic Statistics Method

01/19/21

#### standard deviation question

What happens to the curve when the standard deviation is increased? What does that do to the area under the curve? What happens to the curve when the standard deviation is decreased? What does...
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06/16/18

#### Homework Help really struggling

Question 6 Which of the following is NOT TRUE concerning the graphic depiction ("the curve") of a distribution for means?Question options: A) The curve is skewed to the right. B) The area under...
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11/30/17

#### Type I and II error with small sample size?

Let X ∼ P(λ). We want to test the null hypothesis that λ = 15, and thealternative hypothesis is that λ > 15. Our sample size for this test is equal to 1.
(a) We will reject the null hypothesis...
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09/17/17

#### can someone explain how to get the percentage?

The scores of adults on an IQ test are approximately Normal with mean 110 and standard deviation 17. An organization requires an IQ score of 144 or higher for membership. What percent of adults...
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07/29/17

#### Compare and contrast the following measures of dispersion (range, standard deviation) in terms of what each of these represent and in terms of the relative adva

Compare and contrast the following measures of dispersion (range, standard deviation) in terms of what each of these represent and in terms of the relative advantages/disadvantage of using one over...
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11/28/16

#### May you please help me?

do cafe customers stay longer with darker lighting- is this observational or observational with case control
It's either a.observational b.observational with case control c.experiment or...
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11/28/16

#### Statistics/psych Question

The second one is: do cafe customers stay longer with dark let lighting- is this observational,observational with case control,experiment,experiment with single or double blinding

11/28/16

#### Statistics Question!

Do adding multivitamin supplements to your daily diet help decrease the number of colds caught...is this a double blind or single blind study?

11/03/16

#### The variation found among raw scores in a particular group in referred to as

The variation found among raw scores in a particular group in referred to as:
a. between group variation
b. Within group variation
C. Total variation
d. None

09/30/16

#### A basketballs players attempts 20 shots from the field during a game...

A basketballs players attempts 20 shots from the field during a game. This player hits about 46% of these shots. What is the chance the player hits more than 15 shots? This information will help...
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Statistics Method

01/22/16

#### THE 200 AMERICAN COMMUNITY SURVEY ESTIMATES THAT 14.6% OF AMERICANS LIVE BELOW THE POVERTY LINE, 20.7% SPEAK A LANGUAGE OTHER THAN ENGLISH AT HOME, AND 4.2%

IF I CHOOSE TWO AMERICANS AT RANDOM AND INDEPENDENTLY WHAT IS THE PROBABILITY THAT BOTH LIVE BELOW POVERTY LINE GIVE ANSWER TO THE NEAREST WHOLE PERCENT

09/15/15

#### How do you figure out if coefficients are statistically significant at a certain level?

I have a table with regression statistics, cofficients, SE, t-stat, p-value, lower 85% and upper 95%.
I'm not even sure where to start.
1. I need to find statistical significance at 10%
2....
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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...
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Statistics Method

10/17/13

#### True or False and how do you find the answer.

Suppose that a judges decisions follow a binomial distribution and that his verdict is correct 90% of the time. In his next 10 decisions, the probability that he makes fewer than 2 incorrect...
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