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Statistics

02/13/22

Find the number 1.5 standard deviations below the mean?

x Frequency0 21 152 323 294 105 96 3This has me stumped so hard... I need to round the answer to 3 decimal points as well.

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Statistics Math

02/13/22

Which of the following is NOT an example of a discrete random variable?

Which of the following is NOT an example of a discrete random variable?X = Total steps walked in a dayX = Number of flights that arrive in Edmonton in a dayX = Number of bedrooms in a houseX =... more

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Statistics Math

02/13/22

You decide to start taking coins out of your piggy bank.

You decide to start taking coins out of your piggy bank. Currently, your piggy bank has 47 coins, of which 13 are toonies and 7 are loonies. Suppose that when you take a coin out, you do not put it... more

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Statistics

02/13/22

Statistics Question

With individual lines at its various windows, a post office finds that the standard deviation for waiting times for customers on Friday afternoon is 8.2 minutes. The post office experiments with a... more

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Statistics

02/13/22

State the hypothesis that you are checking. Summarize your results.

8. The CEO of a major chain of stores claims that a particular store’s average daily sales is significantly lower than the average daily sales of all the branch stores. The average daily sales... more

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Statistics

02/13/22

You sample 200 people that took a test-drive and find that 25% of them end up buying a car at your dealership within 1 month of the test-drive.

1. You sample 200 people that took a test-drive and find that 25% of them end up buying a car at your dealership within 1 month of the test-drive. a. Get a 95% confidence interval for the... more

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Statistics

02/13/22

a. What is the mean number of sales? b. What is the standard deviation of number of sales? c. Complete the table below.

1. The probability that a person buys a car from a particular dealership after a test-drive is 25%. From a sample of 100 people that took a test-drive, a. What is the mean number of... more

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Statistics

02/13/22

a. Bar Graph b. Line graph c. Histogram d. Pareto chart e. Pivot chart

2 Using the data from problem 1, make at least one of each of the following charts and tables. Make sure to make your charts with useful information, visually appealing, easy to understand and... more

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Statistics

02/13/22

Statistics Store 1 Store 2 mean median Q1 Q3 Range SD Coefficient of Determination

1. The cost (in dollars) for a sample of 7 products were obtained for two stores as shown in the table below. Get all the statistics for both stores to complete the second... more

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Statistics

02/13/22

Need actual assistance with statistics problem as have not had these classes in 30 years

Cost of widgets follows a bell curve. The mean cost of a widget is $387, with a standard deviation of $19. Between what two values do about 68% of the widgets cost?

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Statistics Probability

02/13/22

Finding the probability of something from the population

Based on a health care researcher of a hospital, the height of female individuals aged 25-35 is normally distributed with a mean of 161 cm and a standard deviation of 9 cm. Please: Determine with... more

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Statistics

02/13/22

What is the probability that he pulls out a sock that is white, returns it to the drawer, and pulls out another sock that is white?

A boy has 25 socks in his top dresser drawer. 7 are black, 10 are white, and 8 are grey. The drawer is above the top of his head, so he cannot see what color a sock is until he reaches in and... more

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Statistics Math

02/12/22

How to Solve this Question?

Using a standard 52-card deck, find the following probabilities. Leave your answer as a reduced fraction.c. If two cards are randomly selected, what is the probability of drawing any one suit... more

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Statistics Linear Algebra Linear Equations

02/12/22

What are the decision variables, contraints and objective function for this LPP

I'm starting to learn LP and I am unable to solve this effectively. Can someone please help derive the decision variables, constraints and objective function for this problem so I can solve... more

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Statistics

02/11/22

Need help solving a problem

Cost of widgets follows a bell curve. The mean cost of a widget is $387, with a standard deviation of $19. Between what two values do about 68% of the widgets cost?

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Statistics

02/11/22

What percent of city residents have Facebook or Instagram accounts? What percent of city residents have neither a Facebook nor an Instagram account?

A survey of a city’s residents shows that 62% have a Facebook account, 78% have an Instagram account, and 56% have a Facebook and an Instagram account

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Statistics

02/11/22

Say you have a biased coin and you associate obtaining a head with the value 0 whereas obtaining a tail has a value of 2. Let X be the sum of the values obtained from tossing the coin three times.

(a) If the probability of getting heads in a single toss is 0.32, then what is the probability distribution of X ? x 0 2 4 6 P(X = x) (b) What is P(X < 6)?(c) What is P(1 < X <... more

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Statistics

02/11/22

Houses show that 45% have attached garages 30% have detached garages and 16% have a TV. Also 50% of houses with a TV have an attached garage and 80% of houses with a detached garage do not have a TV.

a) What is the probability that a randomly chosen house has a garage?Answer: b) What is the probability that a house has an attached garage and a home theatre?Answer: c) What is the probability... more

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Statistics

02/11/22

Suppose that last month, WestJet flights arrived on time 81% of the time and you were on 3 of those flights. (Round your answers to 4 decimal places, if needed.)

(a) Given that each flight is independent of one another, what is the probability that all of your flights arrived on time?Answer: (b) What is the probability that none of your flights arrived on... more

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Statistics Math Probability

02/11/22

7. Find the indicated probability. Round to three decimal places.

The participants in a television quiz show are picked from a large pool ofapplicants with approximately equal numbers of men and women. Amongthe last 11 participants there have been only 2 women.... more

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Statistics

02/11/22

distribution and empirical rule

Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.61 and a standard deviation of 0.43. Using the empirical rule, what... more

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Statistics

02/10/22

Two fair, six-sided dice are rolled. What is the probability that one die shows a 1 and the other die shows a 6?

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Statistics

02/10/22

bell shape distribution

Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.51 and a standard deviation of 0.41. Using the empirical rule, what... more

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Statistics Probability

02/09/22

Stat 1880 worksheet problems

Question 1. If 𝑋 represents the number of heads obtained in three tosses of a fair coin, (Create the table for both parts)(a) Find the probability distribution of 𝑋.(b) Find the expected value and... more

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Statistics Probability

02/09/22

Help me with probability

1. Use the following information to answer the next four exercises. Recently, a nurse commented that when a patient calls the medical advice line claiming to have the flu, the chance that he or she... more

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Find the number 1.5 standard deviations below the mean?

Which of the following is NOT an example of a discrete random variable?

You decide to start taking coins out of your piggy bank.

Statistics Question

State the hypothesis that you are checking. Summarize your results.

You sample 200 people that took a test-drive and find that 25% of them end up buying a car at your dealership within 1 month of the test-drive.

a. What is the mean number of sales? b. What is the standard deviation of number of sales? c. Complete the table below.

a. Bar Graph b. Line graph c. Histogram d. Pareto chart e. Pivot chart

Statistics Store 1 Store 2 mean median Q1 Q3 Range SD Coefficient of Determination

Need actual assistance with statistics problem as have not had these classes in 30 years

Finding the probability of something from the population

What is the probability that he pulls out a sock that is white, returns it to the drawer, and pulls out another sock that is white?

How to Solve this Question?

What are the decision variables, contraints and objective function for this LPP

Need help solving a problem

What percent of city residents have Facebook or Instagram accounts? What percent of city residents have neither a Facebook nor an Instagram account?

Say you have a biased coin and you associate obtaining a head with the value 0 whereas obtaining a tail has a value of 2. Let X be the sum of the values obtained from tossing the coin three times.

Houses show that 45% have attached garages 30% have detached garages and 16% have a TV. Also 50% of houses with a TV have an attached garage and 80% of houses with a detached garage do not have a TV.

Suppose that last month, WestJet flights arrived on time 81% of the time and you were on 3 of those flights. (Round your answers to 4 decimal places, if needed.)

7. Find the indicated probability. Round to three decimal places.

distribution and empirical rule

Two fair, six-sided dice are rolled. What is the probability that one die shows a 1 and the other die shows a 6?

bell shape distribution

Stat 1880 worksheet problems

Help me with probability

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