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Statistics

01/08/22

stat stat stat stat

Suppose 400 automobiles are to be inspected for emissions where 50 of them have higher emissions than the allowed limit. A sample of 10 cars is chosen at random and the number of cars that have... more

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Statistics

01/07/22

Suppose that you and a friend are playing cards and you decide to make a friendly wager.

The bet is that you will draw two cards without replacement from a standard deck. If both cards are clubs, your friend will pay you $6. Otherwise, you have to pay your friend $3. What is the... more

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Statistics Microsoft Excel Probability Data

01/04/22

Probability statistics data analysis excel

A hospital is trying to decide how many new rooms to add to a new wing they are building. Each new room will contain one bed. There are currently 100 rooms. Each new room will cost $80,000 for... more

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Statistics Probability

01/03/22

Card game - spades

In the card game Spades each player is dealt 13 cards. The player with the 2 of clubs starts the game and plays that card. The person to the left then plays their lowest club, followed by the next... more

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Statistics Probability Data Data Science

01/02/22

Probability data analysis statistics

A hospital is trying to decide how many new rooms to add to a new wing they are building. Each new room will contain one bed. There are currently 100 rooms. Each new room will cost $80,000 for... more

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Statistics

01/02/22

In a bag of 100 chips, three are black. If 6 chips are drawn from the bag, what is the chance that a black one will be drawn?

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Statistics

01/02/22

For the above data calculate the mean, variance and standard deviation.

Twelfth fish caught had a mass of 2.3kg. summary data for the mass in kg of the 12 fish are follows. Sigma x = 21.4. Sigma x ^2= 40.54

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Statistics

01/01/22

Verizon offers a simple extended warranty plan. If your phone is damaged, they will repair it for up to $300.

Verizon offers a simple extended warranty plan. If your phone is damaged, they will repair it for up to $300. If you lose or destroy your phone, they will give you a $800 voucher towards a new... more

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Statistics Spss

12/31/21

Comparing two Likert instruments in SPSS

I used two Likert instruments to measure stress on one sample, and would like to compare the two instruments in SPSS. I am unsure of the method to do this.Thank you

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Statistics Probability

12/31/21

Card game - Spades

In the card game Spades each player is dealt 13 cards. The player with the 2 of clubs starts the game and plays that card. The person to the left then plays their lowest club, followed by the... more

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Statistics

12/29/21

6- If, in a sample of n=16 selected from a normal population,x̅=56 and S=12, what is the value of the t-test statistic if you are testing the null hypothesis, H0: µ=50?

1- If, in a sample of n=16 selected from a normal population,x̅=56 and S=12, what is the value of the t-test statistic if you are testing the null hypothesis, H0: µ=50?

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Statistics Probability Markov Chain Recurrence

12/28/21

How to use the Recursive method to calculate the average number of times that the Markov chain visits a given state ?

Dear expert,In the insight of what mentioned in the appendix of this article,https://link.springer.com/article/10.1007/s11538-011-9638-4My question is, if we already have the transition probability... more

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Statistics Math

12/25/21

Significance level

Five measurements of the tar content of a certain kind of cigarette yielded 14.5, 14.2, 14.4, 14.3 and 14.6 mg/cigarette. Assuming that the data are a random sample from a normal population, show... more

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Statistics Math

12/24/21

hypothesis testing

an examination was given to two classes each consisting of 49 students. In the first class the mean marks were 74 with a standard deviation of 8; in the second class the mean marks were 78 with a... more

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Statistics Math

12/24/21

mean median histogram

A sample of the daily earnings of a food vendor on a street was collected for 300 days. The distribution of earnings is as follows:Earning range($): 100-200 200-250 250-300 ... more

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Statistics Probability

12/21/21

what is/are the critical values?

The data in the accompanying table represent the compressive strength, in thousands of pounds per square inch (psi), of 20 samples of concrete taken two and seven days after pouring. Complete... more

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Statistics

12/21/21

Dummy variables

Is there anyone that can explain to me how I execute a regression analysis with IBM SPSS statistics using dummy variables?

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Statistics Probability

12/21/21

What is the test statistic zstat= ?

A cellphone provider has a business objective of wanting to determine the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at a... more

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Statistics Probability

12/21/21

what is the test statistic here? Zstat = ?

A cellphone provider has the business objective of wanting to determine the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at a... more

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Statistics Probability

12/21/21

The worldwide market share for a web browser was 20.5% in a recent month. Suppose that a sample of 240 random students at a certain university finds that 60 use the browser.

b. Suppose that a sample of n=800 students at the same university (instead of n=240) determines that 25% of the sample use the web browser. At the 0.01 level of significance, is there evidence... more

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Statistics Probability

12/21/21

The data in the accompanying table represent the compressive strength, in thousands of pounds per square inch (psi), of 20 samples of concrete taken two and seven days after pouring.

Sample Two days Seven... more

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Statistics T Test One Tailed t Test Writing A Research Question

12/20/21

When is the One-tailed t-Test the appropriate choice?

I will explain the purpose and function of t-Tests (compare two means scores) Explain that the probability value .05 is applied directionally - exclusively one direction (higher or lower than the... more

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Statistics Probability

12/20/21

If X=70, S=12, and n=16, and assuming that the population is normally distributed, construct a 90% confidence interval estimate of the population mean, μ. please round to two decimal places.

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Statistics Probability

12/20/21

If X=70, S=12, and n=16, and assuming that the population is normally distributed, construct a 90% confidence interval estimate of the population mean, μ. please round to two decimal places.

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Statistics Probability

12/20/21

stats hw final practice 10

Assume there is a sample of n1=4, with the sample mean X1=37 and a sample standard deviation of S1=2, and there is an independent sample of n2=5 from another population with a sample mean of... more

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stat stat stat stat

Suppose that you and a friend are playing cards and you decide to make a friendly wager.

Probability statistics data analysis excel

Card game - spades

Probability data analysis statistics

In a bag of 100 chips, three are black. If 6 chips are drawn from the bag, what is the chance that a black one will be drawn?

For the above data calculate the mean, variance and standard deviation.

Verizon offers a simple extended warranty plan. If your phone is damaged, they will repair it for up to $300.

Comparing two Likert instruments in SPSS

Card game - Spades

6- If, in a sample of n=16 selected from a normal population,x̅=56 and S=12, what is the value of the t-test statistic if you are testing the null hypothesis, H0: µ=50?

How to use the Recursive method to calculate the average number of times that the Markov chain visits a given state ?

Significance level

hypothesis testing

mean median histogram

what is/are the critical values?

Dummy variables

What is the test statistic zstat= ?

what is the test statistic here? Zstat = ?

The worldwide market share for a web browser was 20.5​% in a recent month. Suppose that a sample of 240 random students at a certain university finds that 60 use the browser.

The data in the accompanying table represent the compressive​ strength, in thousands of pounds per square inch​ (psi), of 20 samples of concrete taken two and seven days after pouring.

When is the One-tailed t-Test the appropriate choice?

If X=70​, S=12​, and n=16​, and assuming that the population is normally​ distributed, construct a 90% confidence interval estimate of the population​ mean, μ. please round to two decimal places.

If X=70​, S=12​, and n=16​, and assuming that the population is normally​ distributed, construct a 90% confidence interval estimate of the population​ mean, μ. please round to two decimal places.

stats hw final practice 10

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The worldwide market share for a web browser was 20.5% in a recent month. Suppose that a sample of 240 random students at a certain university finds that 60 use the browser.

The data in the accompanying table represent the compressive strength, in thousands of pounds per square inch (psi), of 20 samples of concrete taken two and seven days after pouring.

If X=70, S=12, and n=16, and assuming that the population is normally distributed, construct a 90% confidence interval estimate of the population mean, μ. please round to two decimal places.

If X=70, S=12, and n=16, and assuming that the population is normally distributed, construct a 90% confidence interval estimate of the population mean, μ. please round to two decimal places.