8,839 Answered Questions for the topic statistics

Statistics Math English Probability

02/18/22

Suppose 2% of students drink more than 3 cups of coffee each day.
Suppose 2% of students drink more than 3 cups of coffee each day. To check this claim, a researcher randomly selected a sample of 131 students and found that 4 drink more than 3 cups of coffee each... more
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Statistics Math English Probability

02/18/22

Suppose 2% of students drink more than 3 cups of coffee each day.
Suppose 2% of students drink more than 3 cups of coffee each day. To check this claim, a researcher randomly selected a sample of 131 students and found that 4 drink more than 3 cups of coffee each... more
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Statistics Math English Probability

02/18/22

At a particular university, students' grades…
At a particular university, students' grades in introductory statistic classes are generally unimodal and skewed to the left with a mean of u = 63 and a standard deviation of o = 18.0. (Round to 2... more
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Statistics Math English Probability

02/18/22

The distribution of actual weights of wedges…
The distribution of actual weights of wedges of cheddar cheese produced at a dairy is normal with a mean of 9.1 ounces and a standard deviation of 0.2 ounces. (Round to 2 decimal places for all... more
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Statistics Math English Probability

02/18/22

In a large population of adults, the mean IQ is 123…
In a large population of adults, the mean IQ is 123 with a standard deviation of 17. Suppose 60 adults are randomly selected for a market research campaign. (Round to 2 decimal places for all... more
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Statistics Math English Probability

02/18/22

The number of undergraduates at Small University…
The number of undergraduates at Small University is approximately 2200, while the number at Large University is approximately 57200. At both schools, a simple random sample of about 2% of the... more
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Statistics Probability

02/17/22

Statistics and Probability
The Highway Loss Data Institute’s Injury and Collision Loss Experience Report rates car models on the basis of the number of insurance claims filed after accidents. Index ratings near 100 are... more
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Statistics Math Probability

02/17/22

MATH/ STATISTICS AND PROBABILITY
The mathematics Club of College of Arts and Sciences of University XYZ will sponsor an intercollegiate quiz bee. Each contestant will answer 50 questions: 20 in mathematics, 10 in current events,... more
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Statistics Math

02/17/22

Statistics: Math Help - Binomial Distribution
A fair coin is flipped 13 times. Find the probability that more than 7 of the flips turn up tails. __0.290527 __0.265906 ❌0.242364 __0.316153 __0.342697 __0.178765
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Statistics

02/17/22

What is the probability that you will choose a person in the children or young adult category?
... more
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Statistics

02/17/22

Raw Data for statistics

How do you find the cumulative proportion
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Statistics Math Maximum Z Score

02/16/22

Math Help - z-score
A random experiment involves drawing a sample of 12 data values from a normally distributed population. The random variable is the z-score of the maximum of the data... more
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Statistics Math Probability

02/15/22

Recent MLS listings of houses for sale in Edmonton…
Recent MLS listings of houses for sale in Edmonton show that 40% have attached garages, 25% have detached garages, and 18% have a home theatre. Additionally, 50% of houses with a home theatre have... more
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Statistics

02/14/22

I need help answering a homework problem
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4.5 years, and standard deviation of 1.3 years.The 2% of items with the shortest lifespan will last less... more
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Statistics

02/13/22

what the probability?
Assume that when adults with smartphones are randomly​ selected, 46​% use them in meetings or classes. If 7 adult smartphone users are randomly​ selected, find the probability that at least 5 of... more
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Statistics Math

02/13/22

Claire and George are tasked with decorating Easter eggs.
Claire and George are tasked with decorating Easter eggs. The amount of eggs that Claire can decorate in an hour is a random variable with μ = 20 and 𝜎 = 2. The amount of eggs that George can... more
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Statistics Math

02/13/22

Say you have a biased coin and you associate…
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.... more
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Statistics Math

02/13/22

Suppose you are playing a game.
Suppose you are playing a game. The random variable, Y, represents your net profit in dollars. The probabilitydistribution of Y is as follows. (Round your answers to 4 decimal places, if needed.)y ... more
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Statistics Math

02/13/22

You are given the following distributions, where some of the probabilities have been removed.
You are given the following distributions, where some of the probabilities have been removed. Complete the tables so that each probability distribution is valid. (Round your answers to two decimal... more
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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

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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