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jamari

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Latest questions from jamari

A keyboarding instructor wants to test if a new method of instruction is effective. With the old method students typed a mean of 60 60 60 words per minute with a standard deviation of 3.5 3.5 3.5 words per minute. Thirty...
1 answer
A manufacturer claims that their battery for a particular cell phone model lasts 10 hours. However, consumers complained that the batteries lasted less than 10 hours. The manufacturer randomly sampled 24 batteries and fo...
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One household is to be selected at random from a town. ​ ​The probability that ​the household has a cat is 0.2 0.2. ​ ​The probability that the household has a dog ​is 0.4 0.4. ​ ​The probability that the household has a...
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make this way shorter and easier for me please How to pick 50 students (randomly, simply) - Get a complete list of all students (roster). - Number them 1 to N. - Use a random-number generator (phone/computer) to pick 50...
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make the response much smaller and easier. Jared is interested in finding out which of two types of soda are preferred by ​students at his school. ​ ​Explain how he can randomly choose fifty students to ​participate in a...
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(a) A track coach is interested in comparing two new types of running shoes, ​Shoe and Shoe , to test whether his runners perform better wearing one ​type of shoe versus the other. To investigate, the coach recorded the...
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make this a little more simple Four reds in a row has probability (1/2)^4 = 1/16 = 6.25% — uncommon, but it will happen sometimes. Thinking that a run of reds makes the next spin less likely to be red is the gambler’s fa...
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make this answer a little more easier to explain for people Not really. If the wheel is fair and each spin is independent, the chance the next spin is red is still 15/30 = 1/2, no matter what happened before. Four reds i...
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A wheel at a carnival game has 30 sectors of equal size, with 15 red sectors ​and 15 black sectors. ​ ​At the end of a spin of the wheel, the pointer is equally ​likely to land on a red sector or a black sector. ​ ​A boy...
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which box plot is longer
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(a) A guidance counselor at a school wants to compare the effectiveness of two different SAT prep courses in improving students’ math scores. ​He ​collects data for 400 students who took the SAT for the first time, compl...
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make this look much more normal like a regular 11th style with less steps
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Step 1 — define the population and sampling frame - Population: every student at Samuel’s school (or a subset, e.g. grades 6–12 if applicable). - Sampling frame: a list of all those students (school roster, class lists,...
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Samuel is interested in finding out the favorite video game of other students ​at his school. Part A: Samuel decides he is going to conduct a sample survey to answer ​this question. ​Explain how he could design his surve...
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Based on the procedure given in Part A, what is one possible ​simulation result that represents the player hitting 2 consecutive ​homeruns during 10 times at bat?
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In analyzing a baseball team’s performance over several seasons, the coach ​observed that a particular baseball player hit a home run once every 10 ​times at bat. ​ ​Part A Explain a procedure for using a random number g...
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Describe one change that Tim can make before his second selection ​so that the events “Tim’s first card is a 9 " and “Tim’s second card is ​a 9" will become independent. BoldItalicUnderlineAlign Align Left Align Center A...
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(a) Tim chooses one card at random from a deck of cards, where each card ​has a single number from 1 to 13 and each number appears on different ​colored cards. ​He holds his selected card in his hand and chooses another...
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