268 Answered Questions for the topic Stats

03/16/22

#### Non Standard Distributions, Central Limit Theorem

Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15.
102
122
A...
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12/16/21

#### Probability Question

A thermostat is set on 70 degrees. A room temperature is distributed normally with the standard deviation of .1. What is the probability that the room temperature will be higher than 70.2 degrees?

10/03/21

#### ASAP: determine all the winning coalitions and find banzhaf power distribution

determine all the winning coalitions and find banzhaf power distribution (Show all work)[16:5,5,11,6,3]

08/10/21

#### 21.7: Find a 95% confidence interval for this difference and interpret it in context.

In analyzing the city and highway fuel efficiencies of many cars and trucks, the mean difference in fuel efficiencies for the 632 vehicles was 7.36 mpg with a standard deviation of 2.59 mpg. Find...
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08/10/21

#### 21.7: Find a 95% confidence interval for this difference and interpret it in context.

In analyzing the city and highway fuel efficiencies of many cars and trucks, the mean difference in fuel efficiencies for the 632 vehicles was 7.36 mpg with a standard deviation of 2.59 mpg. Find...
more

08/10/21

#### 7.10: What fraction of the variability in potassium is accounted for by the amount of fiber that servings contain?

The correlation between a cereal's fiber and potassium contents is r=0.904. What fraction of the variability in potassium is accounted for by the amount of fiber that servings...
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08/10/21

#### 7.10: What fraction of the variability in potassium is accounted for by the amount of fiber that servings contain?

The correlation between a cereal's fiber and potassium contents is r=0.904. What fraction of the variability in potassium is accounted for by the amount of fiber that servings...
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08/09/21

#### 7.10: What fraction of the variability in potassium is accounted for by the amount of fiber that servings contain?

The correlation between a cereal's fiber and potassium contents is r=0.892. What fraction of the variability in potassium is accounted for by the amount of fiber that servings...
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08/09/21

The correlation between a cereal's fiber and potassium contents is r=0.892. What fraction of the variability in potassium is accounted for by the amount of fiber that servings...
more

08/09/21

#### 7.3: A newborn was 48 cm long and weighed 3 kg. According to the regression model, what was his residual? What does that say about him?

A least squares regression line was calculated to relate the length (cm) of newborn boys to their weight in kg. The line is weight=−6.07+0.1693 length. A newborn was 48 cm long and weighed 3 kg....
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08/09/21

#### 7.3: A newborn was 48 cm long and weighed 3 kg. According to the regression model, what was his residual? What does that say about him?

A least squares regression line was calculated to relate the length (cm) of newborn boys to their weight in kg. The line is weight=−6.07+0.1693 length. A newborn was 48 cm long and weighed 3 kg....
more

08/08/21

#### Find the probability of each event described. Complete parts a through d below.

The soccer team's shirts have arrived in a big box, and people just start grabbing them, looking for the right size. The box contains 6 medium, 11 large, and 9 extra-large shirts. A player...
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08/08/21

#### Find the probability of each event described. Complete parts a through d below.

The soccer team's shirts have arrived in a big box, and people just start grabbing them, looking for the right size. The box contains 6 medium, 11 large, and 9 extra-large shirts. A player...
more

08/08/21

#### If he leaves class late, there is a 46% chance that he will miss his train. What is the probability that he gets out of class late and misses the train?

A student figures that he has a 51% chance of being let out of class late. If he leaves class late, there is a 46% chance that he will miss his train. What is the probability that he gets out of...
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08/08/21

#### If he leaves class late, there is a 46% chance that he will miss his train. What is the probability that he gets out of class late and misses the train?

A student figures that he has a 51% chance of being let out of class late. If he leaves class late, there is a 46% chance that he will miss his train. What is the probability that he gets out of...
more

08/08/21

#### 13.2: What is the probability that a randomly selected person in the country enjoys cooking or shopping or both?

Fifty-four percent of people in a certain country like to cook and 52% of people in the country like to shop, while 22% enjoy both activities. What is the probability that a randomly selected...
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08/08/21

#### 13.2: What is the probability that a randomly selected person in the country enjoys cooking or shopping or both?

Fifty-four percent of people in a certain country like to cook and 52% of people in the country like to shop, while 22% enjoy both activities. What is the probability that a randomly selected...
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08/08/21

#### 13.1: Suppose that 20% of people have a dog, 32% of people have a cat, and 8% of people own both. What is the probability that someone owns a dog or a cat?

Suppose that 20% of people have a dog, 32% of people have a cat, and 8% of people own both. What is the probability that someone owns a dog or a cat?The probability of a person having a dog...
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08/08/21

#### 13.1: Suppose that 20% of people have a dog, 32% of people have a cat, and 8% of people own both. What is the probability that someone owns a dog or a cat?

Suppose that 20% of people have a dog, 32% of people have a cat, and 8% of people own both. What is the probability that someone owns a dog or a cat?The probability of a person having a dog...
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08/08/21

#### 14.3: What are the mean and standard deviation of his total weekly salaries?

An employer pays a mean salary for a 5-day workweek of $1050 with a standard deviation of $136. On the weekends, his salary expenses have a mean of $350 with a standard deviation of $60. What...
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08/08/21

#### 14.3: What are the mean and standard deviation of his total weekly salaries?

An employer pays a mean salary for a 5-day workweek of $1050 with a standard deviation of $136. On the weekends, his salary expenses have a mean of $350 with a standard deviation of $60. What...
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08/04/21

#### c15.9: A basketball player has made 80% of his foul shots during the season. Assuming the shots are independent, find the probability that in tonight's game he does the following.

A basketball player has made 80% of his foul shots during the season. Assuming the shots are independent, find the probability that in tonight's game he does the following.a) Misses for the...
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08/04/21

#### c15.9: A basketball player has made 80% of his foul shots during the season. Assuming the shots are independent, find the probability that in tonight's game he does the following.

A basketball player has made 80% of his foul shots during the season. Assuming the shots are independent, find the probability that in tonight's game he does the following.a) Misses for the...
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08/04/21

#### C17.4: . The sample showed the average loss was $8601 with a standard deviation of $1405

The housing market has recovered slowly from the economic crisis of 2008. Recently, in one large community, realtors randomly sampled 48 bids from potential buyers to estimate the average loss in...
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08/04/21

#### C17.4: . The sample showed the average loss was $8601 with a standard deviation of $1405

The housing market has recovered slowly from the economic crisis of 2008. Recently, in one large community, realtors randomly sampled 48 bids from potential buyers to estimate the average loss in...
more

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