Mathematics, 28.11.2019 05:31, ayeheavymetal
Acommonly cited standard for one-way length (duration) of school bus rides for elementary school children is 30 minutes. a local government office in a rural area randomly samples 100 elementary school children in their district and find an average one-way commute time of 38 minutes with a standard deviation of 8 minutes. which of the following is the correct set of hypotheses for testing if the average commute time of elementary school students in this district is different than the commonly cited standard of 30 minutes? h0: x = 38; ha: μ = 30
h0: μ = 30; ha: μ ≠ 30
h0: μ = 30; ha: x = 38
ha: μ = 30; h0: x ≠ 30
h0: μ = 30; ha: μ > 30
Answers: 2
Mathematics, 21.06.2019 17:00, nelyanariba981p555ve
Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?
Answers: 1
Mathematics, 21.06.2019 17:00, DivineMemes420
100 points, hi, i’m not sure what to do here, the data doesn’t seem to be quadratic .? can anyone me, in advance
Answers: 2
Mathematics, 21.06.2019 23:00, sugar1014
According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.
Answers: 1
Acommonly cited standard for one-way length (duration) of school bus rides for elementary school chi...
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