Homework Help for Statistics

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Statistics is an area of Mathematics that uses large amounts of numerical data to make inferences based on probabilities.

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asrigordon

Lv1

in Statistics·

15 Oct 2022

Question 4

When using the Central Limit Theorem, what is the "magic number" for sample size that allows you to use the C.L.T even if the population is not normally distributed?

_______

1 answered

1 watching

Answer

asrigordon asked for the first time

asrigordon

Lv1

in Statistics·

15 Oct 2022

a. For the population whose graph is shown above, discuss any restrictions needed to apply the Central Limit Theorem.

◯ Since the population distribution is not normal, to use the C.L.T. you need n

◯ You can use the C.L.T. without any restrictions since the Population distribution is Normal

◯ You can use the C.L.T. without any restrictions since the data is from a random sample

◯ Regardless of the population distribution, the C.L.T. always requires n

The above graph represents a Uniform Distribution with a = 8 and b = 22. In other words, X

U (8,22)

We know from Section 5.2 that:

and

Now suppose that repeated samples of size n = 42 are taken from this population. Find to two decimal places:

1 answered

Lv1

in Statistics·

14 Oct 2022

The weight of a randomly selected bag of cement coming off a production line is a random variable with mean µ = 25 pounds and standard deviation σ = 1 pound. Assume that the weights of bags are independent from each other.

What is the standard deviation of the sum of the weights of the FOUR bags that are randomly picked?

1 answered

1 watching

Answer

1943339

Lv1

in Statistics·

14 Oct 2022

What is the standard deviation of the sum of the weights of the FOUR bags that are randomly picked?

1 answered

Answer

castlerock985

Lv1

in Statistics·

7 Oct 2022

We want to compare 6 different group means. Which of the following statistical analyses avoids increasing the overall family-wise error rate?

2 answered

Answer

viridiangiraffe58 asked for the first time

viridiangiraffe58

Lv1

in Statistics·

1 Oct 2022

Below is a histogram of percentages of rejected ballots for each of the 308 federal electoral districts in the 2011 Canadian federal election.

Which answer does NOT accurately describe this histogram?

3 answered

1 watching

Answer

k8bjx4f74j

Lv1

in Statistics·

28 Sep 2022

II Conceptual

2. Match the mathematical expression using the numerical answer keys below (Just write numbers)

for single regression model

2 answered

1 watching

Answer

k8bjx4f74j

Lv1

in Statistics·

28 Sep 2022

I Graphical

1. Which assumption is violated/presented in below graphs:

2 answered

1 watching

Answer

missjeanne asked for the first time

missjeanne

Lv1

in Statistics·

25 Sep 2022

What is statistics

7 answered

1 watching

Answer

papayaprofessor

Lv10

in Statistics·

20 Sep 2022

Non-probability Sampling:

Give 3 Examples of the following Sampling Method Convenience Sampling

Judgmental Sampling

Quota Sampling

2 answered

1 watching

Answer

papayaprofessor

Lv10

in Statistics·

15 Sep 2022

PLEASE SHOW ALL WORK

6 answered

1 watching

Answer

papayaprofessor

Lv10

in Statistics·

15 Sep 2022

Amber is conducting research on the impact of gender (male/female) and ethnicity (white/black/hispanic) on attitudes towards cats. What type of design is being used?

◯ A mixed design

◯ A between-subjects design

◯ A within-subjects design

◯ A matching design

Amber is conducting research on the impact of gender (male/female) and ethnicity (white/black/hispanic) on attitudes towards cats. Assuming she wants 20 participants per condition. How many participants will she need total?

6 answered

2 watching

Answer

papayaprofessor

Lv10

in Statistics·

15 Sep 2022

A computer password must be eight characters long. How many passwords are possible if only the 26 letters of the alphabet are allowed?

Assuming that repetitions of alphabets is possible to create the password then the number of passwords possible

Assuming that repetitions of alphabets is not possible to create the password then the number of passwords possible

A jar contains 4 red marbles numbered 1 to 4 and 10 blue marbles numbered 1 to 10. A marble is drawn at random from the jar. Find the probability the marble is blue or even- numbered.

2 answered

1 watching

Answer

papayaprofessor

Lv10

in Statistics·

11 Sep 2022

The equation for the regression line that predicts home equity using FICO credit score as the explanatory variable is

What is the interpretation of the slope?

What is the interpretation of the intercept?

- FICO credit score when home equity is 0

- Home equity when FICO credit score is 0

- No practical interpretation

2 answered

1 watching

Answer

v2hz8fb9nb asked for the first time

v2hz8fb9nb

Lv1

in Statistics·

9 Aug 2022

Which nutrient helps the immune system fight the disease?

⚪ carbohydrates

⚪ vitamins

24 answered

1 watching

Answer

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