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Statistics

01/26/22

Suppose Isabella has developed the following fitted regression equation for the price of a Edmonton condo: Price= 151000 + 47*(Square footage)

a) If someone wants to purchase a 700 sq. ft. Edmonton condo, how much should they expect to pay?b) If they want to buy a unit that is 89 square feet bigger, then how much more money should they... more

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Statistics

01/26/22

An economics professor decides to curve the grades of his class. In doing so, he decides to make it such that the students who score in the top 11% receive an A.

Assume a normal distribution among grades. How many standard deviations above the mean must a student get to receive an A? (Round to 2 decimal places, if needed)

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Statistics

01/26/22

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 nearest integer)

a) Find the 85th percentile of credit scores in Canada.b) 65% of Canadians have a credit score higher than what value?c) Mac’s credit score is 720. In what percentile is his credit score?

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Statistics

01/26/22

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

a) P(Z < 0.11):b) P(Z > 0.4):c) P(-0.66 < Z < 1.93):d) P(Z = 1.38):

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Statistics

01/26/22

A Tim Horton’s has recently opened up in Edmonton. Mean=6 mins, Standard deviation=2.6 mins

a)What is the best probability that it takes less than 5.6 mins for a randomly selected car to be served after ordering? (Round to 4 decimal places)b)What is the probability that it takes more than... more

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Statistics

01/26/22

normally distribution population

RTK Antigen Test is carried out to detect viral proteins related to the Covid-19 virus to determine active infection. Since September 2021, Malaysia government has set the maximum ceiling prices... more

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Statistics

01/25/22

Can I use a one-sample t test to compare the number of sea fans on one solid reef with the average number of sea fans on three boulder reefs.

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Statistics Business Accounting

01/24/22

You have a student loan of $20,000. since it is not a federally subsidized loan, it will generate interest over the course of 4 years.

Let’s say you get a rate of 1% applied monthly. Show the calculation you will do to find how much you will owe by the time you graduate

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Statistics

01/22/22

What is the estimated standard error for a sample of n = 9 scores with s2 = 36?

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Statistics

01/21/22

a) What is the point estimate,b) What is the margin of error

If a confidence interval for the mean is (44 ≤ μ ≤ 98), a) What is the point estimate? b) What is the margin of error

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Statistics

01/21/22

Which of the following would result in the widest confidence interval?

Which of the following would result in the widest confidence interval? a) A sample size of 100 with 90% confidence b) A sample size of 30 with 95% confidence. c) A sample size of 100 with 95%... more

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Statistics

01/21/22

How many more bacteria should you sample to achieve a 0.45-hour margin of error?

You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 40 bacteria reveals a sample mean of 72 hours. The standard deviation is known to be... more

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Statistics

01/21/22

How large of a sample size is required?

You want to obtain a sample to estimate the average number of hours per week Nexford Statistics students work at their job while being a full-time student. Based on previous evidence, you believe... more

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Statistics

01/21/22

How large of a sample size is required?

You want to obtain a sample to estimate the average number of hours per week Nexford students work at their job while being a full-time student. Based on previous evidence, you believe the... more

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Statistics

01/21/22

How large of a sample size is required?

You want to obtain a sample to estimate the average number of hours per week community college students in the United States work at their job while being a full-time student. Based on previous... more

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Statistics

01/21/22

Find the 99% confidence interval.

You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures. Assume the temperatures are normally distributed. Find the 99% confidence... more

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Statistics

01/21/22

Construct a 90% confidence interval in the form estimate+_ margin of error

In a survey 21 people were asked how much they spent on their child last birthday gift.The results were roughly bell shaped with a mean of $40a and standard deviation of $19 . Construct a 90%... more

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Statistics

01/21/22

explain the mean of the interval in a sentence

The effectiveness of a blood pressure drug in being investigated.An experiment finds that on average the reduction in systolic blood pressure is 57.6 for a sample of size 846 and standard deviation... more

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Statistics Standard Deviation

01/21/22

When dragons on planet Pern lay eggs, the eggs are either green or yellow. The biologists have observed over the years that 32% of the eggs are yellow, and the rest green.

When dragons on planet Pern lay eggs, the eggs are either green or yellow. The biologists have observed over the years that 32% of the eggs are yellow, and the rest green. Next spring the lead... more

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Statistics

01/19/22

Based on the data points of heights within a classroom if you were 70inches tall what percentile would you be in?

(63 64 61 65 63 67 68 62 73 70 66 72 62 63 62 68 66 67 72 72 66 60 64.8 62 62 63 68)

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Statistics

01/18/22

The set of data below represents a height distribution. Based on the data below what number represents the top 5% of students

(63 64 61 65 63 67 68 62 73 70 66 72 62 63 62 68 66 67 72 72 66 60 64.8 62 62 63 68)

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Statistics

01/18/22

Based on the information below if you are 70 inches what is the probability someone is at least as tall as you?

Suppose the class distribution of heights is normal (63 64 61 65 63 67 68 62 73 70 66 72 62 63 62 68 66 67 72 72 66 60 64.8 62 62 63 68)

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Statistics

01/18/22

Suppose your friend’s 8th grade sibling is 59.5 inches tall. Their class average height is 63.4 inches with a standard deviation of 2.1 inches. How does this compare to you if you were 70inches?

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Statistics

01/17/22

What is the sample? What Is the population? What is the parameter? What is the symbol for this parameter? What is the symbol for this statistics What is the statistics?

A researcher wanted to get the percentage of college students that major in business. The researcher got information from 5 college with a total of 11 thousand students and found that 1.5 thousand... more

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Statistics

01/17/22

What is the population? What is the parameter? What is the symbol for this parameter? What is the sample? What is the statistics?

A researcher wants to determine the average amount of minutes it takes for a medicine to reduce headache pain for adult.He contacted 107 but only got results from 79 of the subjects, the average... more

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Suppose Isabella has developed the following fitted regression equation for the price of a Edmonton condo: Price= 151000 + 47*(Square footage)

An economics professor decides to curve the grades of his class. In doing so, he decides to make it such that the students who score in the top 11% receive an A.

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 nearest integer)

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

A Tim Horton’s has recently opened up in Edmonton. Mean=6 mins, Standard deviation=2.6 mins

normally distribution population

Can I use a one-sample t test to compare the number of sea fans on one solid reef with the average number of sea fans on three boulder reefs.

You have a student loan of $20,000. since it is not a federally subsidized loan, it will generate interest over the course of 4 years.

What is the estimated standard error for a sample of n = 9 scores with s2 = 36?

a) What is the point estimate,b) What is the margin of error

Which of the following would result in the widest confidence interval?

How many more bacteria should you sample to achieve a 0.45-hour margin of error?

How large of a sample size is required?

How large of a sample size is required?

How large of a sample size is required?

Find the 99% confidence interval.

Construct a 90% confidence interval in the form estimate+_ margin of error

explain the mean of the interval in a sentence

When dragons on planet Pern lay eggs, the eggs are either green or yellow. The biologists have observed over the years that 32% of the eggs are yellow, and the rest green.

Based on the data points of heights within a classroom if you were 70inches tall what percentile would you be in?

The set of data below represents a height distribution. Based on the data below what number represents the top 5% of students

Based on the information below if you are 70 inches what is the probability someone is at least as tall as you?

Suppose your friend’s 8th grade sibling is 59.5 inches tall. Their class average height is 63.4 inches with a standard deviation of 2.1 inches. How does this compare to you if you were 70inches?

What is the sample? What Is the population? What is the parameter? What is the symbol for this parameter? What is the symbol for this statistics What is the statistics?

What is the population? What is the parameter? What is the symbol for this parameter? What is the sample? What is the statistics?

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