Mathematics, 05.12.2019 03:31 bestballer7095
The attention span of children (ages 3 to 5) is claimed to be normally distributed with a mean of 15 minutes and a standard deviation of 4 minutes. a test is to be performed to decide if the average attention span of these kids is really this short or if it is longer. you decide to test the hypotheses h0: μ = 15 versus ha: μ > 15 at the 5% significance level. a sample of 10 children will watch a tv show they have never seen before, and the time until they walk away from the show will be recorded. at a significance level of 5%, the decision rule would be to reject the null hypothesis if the observed sample mean is greater than minutes.
Answers: 3
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 18:50
The volume of a cone is 37x3 cubic units and its height is x units. which expression represents the radius of the cone's base, in units? 1 s o 3x o 6x obx 93x2
Answers: 1
Mathematics, 21.06.2019 22:20
Which of the following equations are equivalent to -2m - 5m - 8 = 3 + (-7) + m? -15m = -4m -7m - 8 = m - 4 -3m - 8 = 4 - m m - 4 = -7m - 8 -8 - 7m = -4 + m -8 - 3m = 4 - m
Answers: 1
Mathematics, 22.06.2019 02:00
Gables properties corp. is leasing office building with an area of 49b^2+70b+25. what is the shape of the building? a) rectangle b) square
Answers: 3
The attention span of children (ages 3 to 5) is claimed to be normally distributed with a mean of 15...
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