Mathematics, 04.04.2020 06:08 fefebat
Pizza sales. A national food product company believes that it sells more frozen pizza during the winter months than during the summer months. Average weekly sales for a sample of stores in the Baltimore area over a one-year period provided the following data for sales volume (in pounds) during the two seasons. Assume that the two seasonal sales have different population standard deviations. Season N Mean StDev Minimum Maximum Winter 13 31234 13500 15312 73841 Summer 14 22475 8442 12743 54706 You want to investigate whether winter sales is the same with summer sales. Which among the following tests should you use? a. two sample z test
b. two sample pooled-t test (equal population standard deviation)
c. two sample t test with unequal population standard deviation
d. paired t test
Answers: 3
Mathematics, 21.06.2019 14:00
(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?
Answers: 2
Mathematics, 21.06.2019 22:30
Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%
Answers: 1
Mathematics, 22.06.2019 00:30
Candice uses the function f(t)=t+100βββββββ to model the number of students in her after-school program. the variable t represents days and f(t) represents the number of students. how many days does it take for there to be 15 students in her program? a. 225 days b. 125 days c. 325 days d. 115 days
Answers: 2
Pizza sales. A national food product company believes that it sells more frozen pizza during the win...
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