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Statistics Standard Deviation Mean Normal Distribution

02/04/22

Julio observed that customer satisfaction ratings are normally distributed. If the 33rd percentile is 6.775, and the 65th percentile is 7.394 on a scale from 0-10 find the mean and standard deviation

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Statistics Probability

02/03/22

An unfair die is tossed. Determine which of the following assignments could be made for the probabilities of each simple outcome. If an assignment cannot be made, tell why.

Question 1 part 1An unfair die is tossed. Determine which of the following assignments could be made for the probabilities of each simple outcome. If an assignment cannot be made, tell why.(a) 𝑃(1)... more

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Statistics

02/03/22

Stats Question (68-95-99.7 rule)

On an exam whose scores followed a normal distribution, a student's z-score was −1. What percentage of students scored better than he did? (Use the 68-95-99.7 Rule.)

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Statistics Spss Research Statistics Method

02/02/22

Which method should I use to utilize my data in SPSS?

I have a dataset that I need to utilize for my dissertation, but I was not sure which method to utilize the data. Therefore, I need help!My study is comparing pretest scores, midtest scores (after... more

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Statistics Probability

02/02/22

The discrete random variable Z has the following discrete random variable distribution. What is E([Z-2]^2)?

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Statistics Probablity

02/02/22

stats and probablity!

e BMI for female patients with Type II Diabetes is normally distributed with a mean of 32.96 and standard deviation 6.75. Use the Empirical Rule to answer part a. We expect 68% of females with Type... more

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Statistics Probability

02/02/22

Struggling! Any help would be appriciated. In previous questions i was able to get all z scores but not the probability.

Serum cholesterol is an important risk factor for coronary disease. Suppose that serum cholesterol is approximately normally distributed with mean 217 mg/dL and standard deviation 46.47... more

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Statistics

02/01/22

Statistics help!

We want to test Ho: µ=50 against Ha: µ<50.Significance level = 10%Population standard deviation = 20random sample size = 30What is the power of the test if the true mean µ = 40?What is the... more

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Statistics

01/31/22

Statistic Help.

3. A sample of n = 9 scores has a M = 8. If on of the scores with a value of X = 12 isremoved from the sample of scores, what is the new mean for the remaining sample?4. A sample of scores has a M... more

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Statistics Probability

01/31/22

Find the smallest sigma-algebra for Ω = {−2, −1, 0, 1, 2}

Find the smallest sigma-algebra for which the function X(ω)=2|ω| is a random variable. Ω = {−2, −1, 0, 1, 2}Determine its distribution, probability function and E(X).

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Statistics

01/30/22

solving probability

Suppose that 47% of people own dogs. If you pick two people at random, what is the probability that they both own a dog?

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Statistics

01/29/22

random Probability

Fertile (female) cats produce an average of six litters per year. Suppose that one fertile, female cat is randomly chosen. In one year, find the probability she produces:a. Find the probability... more

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Statistics

01/29/22

Acceptance Sampling

Many manufacturing companies use a quality control procedure called acceptance sampling to make sure that a specific production batch is up to their standards. To do this, a sample of the items... more

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Statistics Math Algebra 1 Algebra 2

01/29/22

Humicide algebra problem (help)

A coroner arrives on the scene of a homicide at 8:00 pm in a temperature-controlled room, held at 60 degrees F. The temperature of the body is given by the function 𝑇(𝑡) = 28.6𝑒^-0.0008t + 60,... more

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Statistics Math Algebra 1 Algebra 2

01/29/22

Homicide algebra problem (help please)

A coroner arrives on the scene of a homicide at 8:00 pm in a temperature-controlled room, held at 60 degrees F. The temperature of the body is given by the function 𝑇(𝑡) = 28.6𝑒^ -0.0008t + 60... more

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Statistics Math Algebra 1 Algebra 2

01/29/22

Flu Algebra problem (someone help please )

A flu patient is prescribed a course of an antivirus drug. The number of mg of the drug in the bloodstream 𝑡 hours after the first dose is taken is given by the function 𝐴(𝑡) = 400𝑡𝑒^-3ta. Sketch... more

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Statistics

01/28/22

Find area under the standard normal distribution represented by each probability. (Round to 4 decimal places)

a) P(Z < 0.75):b) P(Z > -0.42):c) P(-0.69 < Z < 0.62):d) P(Z = 0.52):

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Statistics

01/28/22

The average credit score in Canada is 650. Assume that credit scores follow a normal distribution with a standard deviation of 80.(round each to the nearest integer)

a) Find the 80th percentile of credit scores in Canada.b) 75% of Canadians have a credit score higher than what value?c) Mac’s credit score is 770. In what percentile is his credit score?

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Statistics Math Algebra 1 Algebra 2

01/28/22

Algebra Caffeine problem

Rebecca drinks a cup of coffee every morning at 5:00 am. The amount of caffeine (in mg) in her body as a result of drinking this coffee is given by the function 𝐴(𝑡) = 200(1/2)^t/6, where 𝑡 is time... more

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Statistics

01/28/22

if y=2(x+4) square -1 what is the axis symmetry

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Statistics

01/28/22

Mathematics/Stats

In a study of government financial aid for college students, it becomes necessary to estimate the percentage of -time college students who earn a bachelor's degree in four years or less. Find the... more

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Statistics

01/27/22

AP Statistics X-Bar Questions

Based on long experience, an airline found that about 2% of the people making reservations on a flight from Miami to Denver do not show up for the flight. Suppose the airline overbooks this flight... more

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Statistics

01/27/22

AP Statistics X-Bar Question

In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities.It is estimated... more

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Statistics

01/26/22

Marco enjoys playing hockey in his spare time. In his past 6 seasons, the number of goals he has scored each season is as follows:

[16,19,17,24,21,17]a) What is the sample standard deviation?

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Statistics

01/26/22

Brandon works as a statistician for the Toronto Blue Jays, and wants to analyze the relationship between a player’s age and how many strikeouts they accumulate in a season.

He takes a sample of 7 Blue Jays players with age between 25 and 34 and finds there is a linear relationship between their ages and the number of strikeouts they had in the 2015 season. Here are... more

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Julio observed that customer satisfaction ratings are normally distributed. If the 33rd percentile is 6.775, and the 65th percentile is 7.394 on a scale from 0-10 find the mean and standard deviation

An unfair die is tossed. Determine which of the following assignments could be made for the probabilities of each simple outcome. If an assignment cannot be made, tell why.

Stats Question (68-95-99.7 rule)

Which method should I use to utilize my data in SPSS?

The discrete random variable Z has the following discrete random variable distribution. What is E([Z-2]^2)?

stats and probablity!

Struggling! Any help would be appriciated. In previous questions i was able to get all z scores but not the probability.

Statistics help!

Statistic Help.

Find the smallest sigma-algebra for Ω = {−2, −1, 0, 1, 2}

solving probability

random Probability

Acceptance Sampling

Humicide algebra problem (help)

Homicide algebra problem (help please)

Flu Algebra problem (someone help please )

Find area under the standard normal distribution represented by each probability. (Round to 4 decimal places)

The average credit score in Canada is 650. Assume that credit scores follow a normal distribution with a standard deviation of 80.(round each to the nearest integer)

Algebra Caffeine problem

if y=2(x+4) square -1 what is the axis symmetry

Mathematics/Stats

AP Statistics X-Bar Questions

AP Statistics X-Bar Question

Marco enjoys playing hockey in his spare time. In his past 6 seasons, the number of goals he has scored each season is as follows:

Brandon works as a statistician for the Toronto Blue Jays, and wants to analyze the relationship between a player’s age and how many strikeouts they accumulate in a season.

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