Mathematics, 07.03.2020 05:08, xeno777
The manager of an online shop wants to determine whether the mean length of calling time of its customers is significantly more than 3 minutes. A random sample of 100 customers was taken. The average length of calling time in the sample was 3.1 minutes with a standard deviation of 0.5 minutes. At a 0.05 level of significance, it can be concluded that the mean of the population is?
a. significantly less than 3.
b. significantly greater than 3.
c. not significantly greater than 3.
d. not significantly different from 3.10.
Answers: 2
Mathematics, 21.06.2019 19:00, cheryljoseph69
Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?
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Mathematics, 21.06.2019 23:20, galaxyomg661p0edpt
8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?
Answers: 3
Mathematics, 22.06.2019 02:00, shekinahconnoll3904
4. bob solved the inequality problem below incorrectly. explain his error and redo the problem showing the correct answer. ? 2x + 5 < 17 ? 2x + 5-5 < 17-5 -2x/-2 < 12/-2 x < -6
Answers: 2
The manager of an online shop wants to determine whether the mean length of calling time of its cust...
Mathematics, 07.12.2020 21:10
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