8,958 Answered Questions for the topic statistics

Statistics

06/19/22

Please help me with this question
In​ Marissa's calculus​ course, attendance counts for 20% of the​ grade, quizzes count for 20% of the​ grade, exams count for 45% of the​ grade, and the final counts for 15% of the grade. Marissa... more
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Statistics

06/18/22

Standard deviation
About 2 % of the population has a particular genetic mutation. 100 people are randomly selected. Find the standard deviation for the number of people with the genetic mutation in such groups of 100
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Statistics

06/17/22

Please help solve
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 72%. You would like to be 90% confident that your... more
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Statistics

06/16/22

A venture capitalist

A venture capitalist, willing to invest $1,000,000, has three investments to choose from. The first investment, a software company, has a 9% chance of returning $11,000,000 profit, a 35% chance of... more
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Statistics

06/16/22

Joint Distribution of Ranndom Variables
Suppose the joint distribution of random variables X and Y is given as:Part a)Determine the marginal distribution of X. Give your answer as a Python list named pX, where the first, second, and... more
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Statistics

06/16/22

Calculate the Z-Scores

How do I calculate the Z-scores that correspond to weight
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Statistics

06/16/22

calculate the z-score that correspond to 11kg
calculate the z-score that corresponds to 11kg.
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Statistics

06/16/22

I need help please
The graph illustrates a normal distribution for the prices paid for a particular model of HD television. The mean price paid is $1000 and the standard deviation is $140. Answer the following... more
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Statistics

06/16/22

I need help please
The mean daily production of a herd of cows is assumed to be normally distributed with a mean of 38 liters, and standard deviation of 8.9 liters.A) What is the probability that daily production... more
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Statistics

06/16/22

math I need help please
For a standard normal curve find the z-value with 1010% of the data to the right of it. Round your answer to two decimal places.
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Statistics

06/16/22

math 146 I need help
A population of values has a normal distribution with μ=155.5μ=155.5 and σ=9.8σ=9.8. You intend to draw a random sample of size n=173n=173.Find P61, which is the score separating the bottom 61%... more
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Statistics

06/16/22

math 146 I need help

The heights of adult men in America are normally distributed, with a mean of 69.8 inches and a standard deviation of 2.62 inches. The heights of adult women in America are also normally... more
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Statistics

06/16/22

Please advise on solving
Assume that a sample is used to estimate a population proportion p. Find the 95% confidence interval for a sample of size 176 with 16% successes. Enter your answer as an open-interval (i.e.,... more
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Statistics

06/15/22

Statistics and Z

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.)𝜇 = 15.2; 𝜎 = 3.9P(10 ≤ x ≤ 26)... more
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Statistics Math

06/15/22

Probability question

Professor Sucan gives 7 prompts for her students exam, and she says that 4 of them will be on the exam from the 7 given. If her students complete four of the seven prompts ahead of time, it is... more
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Statistics

06/14/22

Statistics Homework
The number of hours you spent studying each day last week was as follows:Monday – 2    Tuesday – 1    Wednesday – 3    Thursday – 2    Friday – 1What is the mean number of hours that you spent... more
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Statistics

06/14/22

What would be the cases here? What variable(s) observed is/are categorical and which variable(s) is/are quantitative?

Suppose a simple random sample of 32 shoppers at a small grocery store was recorded over a one-week time span during the late evening hours. The number of items purchased, the purchase amount in... more
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Statistics

06/14/22

please do this problem
Determine whether the results appear to have statistical​ significance, and also determine whether the results appear to have practical significance.One of a​ botanist's hybridization... more
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Statistics

06/14/22

every time i try to solve this with the formula I get the answer undefined
A machine that manufactures automobile parts produces defective parts 12% of the time. If 8 parts produced by this machine are randomly selected, what is the probability that at most 2 of the parts... more
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Statistics

06/13/22

Statistics Help
A test problem states: Find the standard deviation of this set of numbers 3 , 7 , 4 , 6 , 5 , 9 , 7 , 4                       The answers of four students are:                      A:... more
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Statistics

06/13/22

Statistics homework
Find the range and standard deviation of the list of scores that were made by a football team during a season. Scores: 0, 7, 7, 14, 17, 17, 21, 21                                   Range:... more
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Statistics

06/13/22

Find the probability of getting someone in the 18-21 age bracket or someone who does not respond.
Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 86 people in the 18-21 age bracket and finds that 73 of them respond and 13... more
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Statistics Probability

06/13/22

Estimating odds
Let's say a basketball player has a 55% chance to score more than 20 points in a game. Without any additional information, is there a way to best estimate the odds of that player scoring more than... more
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06/12/22

Blackjack probability
Hello,In a heads up blackjack match, what are the odds the dealer will get a 19 with a total of 7 cards?This is based on an 8 deck game.I recently had a dealer get the following:1) 3 of Diamonds2)... more
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Statistics

06/10/22

measurement scales
Ms. Huma initiated a research where she asked students to collect the list of famous places of Lahore city. Students reported Badshahi mosque, Minar.e.Pakistan, Lawrence garden, Alhamra art... more
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