Mathematics, 29.11.2021 23:50 ctyrector
A manufacturer of light bulbs advertises that, on average, its long-life bulb will last more than 4800 hours. To test this claim, a statistician took a random sample of 103 bulbs and measured the amount of time until each bulb burned out. The mean lifetime of the sample of bulbs is 4887 hours and has a standard deviation of 380 hours. Can we conclude with 90% confidence that the claim is true? Fill in the requested information below.
Answers: 2
Mathematics, 21.06.2019 16:30
Graph red beads cost $1 an ounce and gold beads cost $3 an ounce. juanita wants to purchase a 12-ounce mixture of red and gold beads that she can sell for $2 an ounce. the solution of the system shows the number of beads needed for juanita to break even. x + y = 12, x + 3y = 24 how many ounces of red beads will juanita buy to break even? how many ounces of gold beads will she buy?
Answers: 3
Mathematics, 21.06.2019 19:50
Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?
Answers: 1
A manufacturer of light bulbs advertises that, on average, its long-life bulb will last more than 48...
Mathematics, 24.03.2021 22:00
Mathematics, 24.03.2021 22:00
Spanish, 24.03.2021 22:00
Mathematics, 24.03.2021 22:00
Mathematics, 24.03.2021 22:00
History, 24.03.2021 22:00
Mathematics, 24.03.2021 22:00
Mathematics, 24.03.2021 22:00
English, 24.03.2021 22:00
Mathematics, 24.03.2021 22:00
Mathematics, 24.03.2021 22:00
Physics, 24.03.2021 22:00