8,918 Answered Questions for the topic statistics

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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Statistics

06/10/22

measurement scales
Mr. Haider conducted a survey to estimate the height of women living in Karachi. 60% reported their height 5 feet 3 inches tall, 20% reported 5 feet 5 inches and rest of the 20% reported 5 feet... more
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Statistics

06/10/22

Measurement scales
Mr. Umar showed titanic movie to BS-III semester students. Students rated the movie by using the number of stars i.e. *didn’t like movie at all, **slightly liked the movie, ***somewhat liked the... more
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Statistics

06/10/22

Measurement scales
Dr. Saima took two students from her BS class and asked them to observe the clock and gave example of difference in time using twelve hour and twenty four hour format. One of the students reported... more
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Statistics

06/10/22

What is the midrange of the following data set? 3, 9, 8, 10, 2, 10, 16, 16, 16
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Statistics

06/09/22

Test Study New Drug Probability

In a study, a new drug is found to be effective in 67% of those who took it. 14% of people in the study overall reported mild side effects (soreness, headache or nausea). Also, of the people for... more
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Statistics

06/09/22

Blood Test Probability

Suppose the following of a blood test: Positive 95% of the time when a patient does have the disease (true positive rate). Positive 10% of the time when the patient does not have the disease... more
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Statistics

06/09/22

Coin Probability

Part a)Suppose three coins are in a box: (1) A fair coin, (2) A coin weighted to come up heads 1/5 of the time (and tails 4/5 of the time), and (3) A two-headed coin.A coin is drawn at random,... more
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Statistics

06/09/22

Teacher Set Problem Probability

Suppose the professor gives a class a set of 15 problems, with the information that the test will consist of 7 of these. If a student has figured out how to do 12 of the problems, what is the... more
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Statistics

06/09/22

Card Deck Probability
Five cards are dealt from a regular deck of 52 cards. (Recall that a regular deck of 52 cards consists of 13 kinds/denominations, each having 4 suits: ♥, ♦, ♣ ♠.)Part a)What is the probability that... more
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Statistics

06/09/22

Elk Probability
Twenty elk live in a forest, and 7 were tagged and released. Some time later, 5 elk were randomly caught. Assume all 20 elk were equally likely to be caught. What is the probability that exactly 2... more
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Statistics

06/09/22

Coin Toss Probability
What is the probability that in 7 coin tosses we get exactly 5 heads and 2 tails? Do NOT round.
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Statistics Probability

06/09/22

Fair die probability
A fair, six-sided die is rolled 15 times. Each roll is independent. What is the probability of rolling a “three” more than 6 times?
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