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Statistics

08/02/23

Suppose that pulse rates among healthy adults are normally distributed with a mean of 79 beats/minute and a standard deviation of 10 beats/minute.

Suppose that pulse rates among healthy adults are normally distributed with a mean of 79 beats/minute and a standard deviation of 10 beats/minute. What proportion of healthy adults have pulse rates... more

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Statistics

08/02/23

The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an average (mean) of 1.85 pounds with a standard deviation of 1.05 pounds.

The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an average (mean) of 1.85 pounds with a standard deviation of 1.05 pounds. In a recent study, a... more

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Statistics

08/01/23

Sampling distribution

A consulting firm was tasked to design a system to be used to control a clients’ manufacturing processes. The design specification indicates the mean for the process should be 120 and corrective... more

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Statistics

08/01/23

Sampling distribution

Suppose research indicates that members of the millennial generation are continuing to be dependent on their parents into early adulthood. A family research organization claims that no more than... more

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Statistics

08/01/23

Confidence interval

A sample survey of 60 discount brokers showed the mean price charged for a trade of 100 shares at N$ 500 per share was N$ 337. The survey is conducted annually. With the historical data available,... more

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Statistics

08/01/23

Sampling distribution

It is reported that 63% of all entrepreneurs who opened new enterprises in a certain country in the previous year were university graduates. Suppose a random sample of 300 entrepreneurs who opened... more

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Statistics

07/31/23

Suppose that the creatine kinase levels among healthy males are normally distributed with a standard deviation of 23 units/L.

Suppose that the creatine kinase levels among healthy males are normally distributed with a standard deviation of 23 units/L. Research shows that exactly 5% of the healthy males have a creatine... more

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Statistics

07/31/23

According to her doctor, Mrs. Scott's cholesterol level is higher than only 15% of the females aged 50 and over.

According to her doctor, Mrs. Scott's cholesterol level is higher than only 15% of the females aged 50 and over. The cholesterol levels among females aged 50 and over are approximately normally... more

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Statistics

07/31/23

Suppose that the scores on a reading ability test are normally distributed with a mean of 70 and a standard deviation of 9.

Suppose that the scores on a reading ability test are normally distributed with a mean of 70 and a standard deviation of 9. What proportion of individuals score at least 67points on this test?... more

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Statistics

07/31/23

P(-0.91≤Z≤c)=0.7930

Suppose follows the standard normal distribution. Use the calculator provided, or this table, to determine the value of so that the following is true.P(-0.91≤Z≤c)=0.7930

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Statistics

07/31/23

The mean starting salary offered to graduating students with a certain major in a recent year was $64,260, with a standard deviation of $3,712.

The mean starting salary offered to graduating students with a certain major in a recent year was $64,260, with a standard deviation of $3,712. A random sample of 80 of that year's graduating... more

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Statistics

07/31/23

For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of and a standard deviation of 170.

For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of and a standard deviation of 170. The grading process of this year's... more

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Statistics

07/30/23

find the 90% confidence interval

How many hours per week do gamers play video games? A simple random sample of 84 U.S. gamers age 13 or older are given below.Sample Dataa.) Find a 90% confidence interval for the population average... more

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Statistics

07/30/23

find the 95% confidence interval for the number of seeds for the species

A botanist wishes to estimate the typical number of seeds for a certain fruit. She samples 36 specimens and counts the number of seeds in each. Use her sample results (mean = 56.4, standard... more

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Statistics

07/30/23

If a seed is planted it has a 75% chance of growing into a healthy plant. If 8 seeds are planted what is the probability that exactly 4 don't grow?

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Statistics Math

07/28/23

When one person is selected from this group/sample, find the probability that that person has been in an accident given that he or she drives a blue car. Round your answer to two decimal places.

When one person is selected from this group/sample, find the probability that that person has been in an accident given that he or she drives a blue car. Round your answer to two decimal... more

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Statistics

07/26/23

Elementary Statistics

Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of 250 feet and a standard deviation of 50 feet. We randomly sample 64 fly balls. Find... more

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Statistics Math Test Preparation Algebra 2

07/26/23

Please give answer and show your work for all questions

Let’s assume the following statements are true: Historically, 75% of the five-star football recruits in the nation go to universities in the three most competitive athletic conferences.... more

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Statistics Math Probability

07/23/23

Statistics from Sciences: Probability

During the Manhattan Project, the physicist Enrico Fermi asked Leslie R. Groves, the general in charge, "how do you define a 'great general'?" General Groves replied, "any great general who wins... more

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Statistics Math Probability

07/23/23

Statistics for Sciences: Probability Question

Imagine that a long stretch of a single-stranded DNA has 30% adenine, 25% thiamine, 15% cytosine, and 30% guanine. (These make up the nucleotides of the DNA.) What is the probability of randomly... more

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Statistics

07/23/23

Module 1 statistics

possible The mean finish time for a yearly amateur auto race was 187.48 minutes with a standard deviation of 0.364 minute. The winning cardriven by Frank finished in 186.79 minutes . The previous... more

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Statistics

07/23/23

Help with Stat word problems

A sample of University of Penn students were surveyed. They were asked which of the following they prefer to drink: beer, water, or nether. And their biological sex was recorded. These data is... more

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Statistics Test Preparation Algebra 2 Sat Math

07/22/23

HELP PLEASE EXPLAIN HOW TO DO IT PROPERLY

Can you help me with this word problem>1. Your rich uncle has promised to sell you his vintage car, which is worth $50,000, for just $10,000 if you can raise that amount by your sixteenth... more

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Statistics Math

07/18/23

Probability of Winning

A gambling game is designed as rolling a die 8 times. For each roll, if the number showing up is greater than 4, then it is called a "win" for that roll.Jack is playing this game. What's the... more

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Statistics

07/17/23

the following bivariate data set contains an outlier

X Y25.1 -609.630 -621.423.4 145.130.4 -15921.3 109.922.1 ... more

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Suppose that pulse rates among healthy adults are normally distributed with a mean of 79 beats/minute and a standard deviation of 10 beats/minute.

The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an average (mean) of 1.85 pounds with a standard deviation of 1.05 pounds.

Sampling distribution

Sampling distribution

Confidence interval

Sampling distribution

Suppose that the creatine kinase levels among healthy males are normally distributed with a standard deviation of 23 units/L.

According to her doctor, Mrs. Scott's cholesterol level is higher than only 15% of the females aged 50 and over.

Suppose that the scores on a reading ability test are normally distributed with a mean of 70 and a standard deviation of 9.

P(-0.91≤Z≤c)=0.7930

The mean starting salary offered to graduating students with a certain major in a recent year was $64,260, with a standard deviation of $3,712.

For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of and a standard deviation of 170.

find the 90% confidence interval

find the 95% confidence interval for the number of seeds for the species

If a seed is planted it has a 75% chance of growing into a healthy plant. If 8 seeds are planted what is the probability that exactly 4 don't grow?

When one person is selected from this group/sample, find the probability that that person has been in an accident given that he or she drives a blue car. Round your answer to two decimal places.

Elementary Statistics

Please give answer and show your work for all questions

Statistics from Sciences: Probability

Statistics for Sciences: Probability Question

Module 1 statistics

Help with Stat word problems

HELP PLEASE EXPLAIN HOW TO DO IT PROPERLY

Probability of Winning

the following bivariate data set contains an outlier

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