Mathematics, 16.09.2019 21:30 jamarstand
Alice wants to prove to her parents that listening to music while she does her homework will her get better grades. she decides to ask 25 of her friends if they listen to music while they do their homework and what their grades are. she finds that her friends who have high grades also listen to music while they do their homework. she tells her parents that she has proven that listening to music while doing homework will cause her grades to improve. what mistake has alice made?
a) she did not separate her friends into different groups, and she didn't apply a treatment.
b) she did not separate her friends into different groups, and she used a survey to collect data.
Answers: 2
Mathematics, 21.06.2019 20:10, Maddi7328
The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250
Answers: 1
Mathematics, 21.06.2019 21:30, amesha62
In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?
Answers: 1
Mathematics, 21.06.2019 22:20, ashtonviceoxd21i
Which strategy is used by public health to reduce the incidence of food poisoning?
Answers: 1
Mathematics, 22.06.2019 00:00, meganwintergirl
Can someone plz me understand how to do these. plz, show work. in exercises 1-4, rewrite the expression in rational exponent form.[tex]\sqrt[4]{625} \sqrt[3]{512} (\sqrt[5]{4} )³ (\sqrt[4]{15} )^{7}\\ (\sqrt[3]{27} )^{2}[/tex]
Answers: 3
Alice wants to prove to her parents that listening to music while she does her homework will her ge...
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