Mathematics, 14.12.2019 06:31 tanhatanveer6928
Asportswriter wished to see if a football filled with helium travels farther, on average, than a football filled with air. to test this, the writer used 18 adult male volunteers. these volunteers were randomly divided into two groups of nine subjects each. group 1 kicked a football filled with helium to the recommended pressure. group 2 kicked a football filled with air to the recommended pressure. the mean yardage for group 1 was = 30 yards with a standard deviation of s1 = 8 yards. the mean yardage for group 2 was = 26 yards with a standard deviation of s2 = 6 yards. assume that the two groups of kicks are independent. let μ1 and μ2 represent the mean yardage we would observe for the entire population represented by the volunteers if all members of this population kicked, respectively, a helium-filled football and an air-filled football. let σ1 and σ2 be the corresponding population standard deviations. assuming two-sample t procedures are safe to use, what is a 99% confidence interval for μ1 – μ2? (use the conservative value for the degrees of freedom.)a.) 4 ± 7.7 yardsb.) 4 ± 11.2 yardsc.) 4 ± 4.7 yardsd.) 4 ± 6.2 yards
Answers: 2
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Consider circle h with a 3 centimeter radius. if the length of minor arc what is the measure of zrst?
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Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label
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Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.
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Asportswriter wished to see if a football filled with helium travels farther, on average, than a foo...
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