Mathematics, 02.07.2020 20:01 ToxicMonkey
The number of hours that a nine month old baby sleeps at night are normally distributed with a population standard deviation of 1.5 hours and an unknown population mean. A random sample of 22 nine month old babies is taken and results in a sample mean of 12 hours. Find the margin of error for a confidence interval for the population mean with a 90% confidence level.
Answers: 3
Mathematics, 21.06.2019 18:30
Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.
Answers: 1
Mathematics, 22.06.2019 00:30
Abcd is reflected across the x- axis, then rotated 90 clockwise about the orgin, and finally reflected across the line y= x to form a’ b’ c’ .
Answers: 2
Mathematics, 22.06.2019 02:00
Two sides of a right triangle measure 2 units and 4 units. what is the area of the square that shares a side with the third side of the triangle?
Answers: 2
Mathematics, 22.06.2019 02:30
Apossible wavelength for the color blue is 0.000000492 meter. which of the following is a reasonable estimate for this wavelength for the color blue? a. 5 × 10-6 m b. 5 × 107 m c. 5 × 10-7 m d. 5 × 106 m
Answers: 2
The number of hours that a nine month old baby sleeps at night are normally distributed with a popul...
Mathematics, 22.05.2020 23:00
Mathematics, 22.05.2020 23:00
Mathematics, 22.05.2020 23:00
Mathematics, 22.05.2020 23:00
Mathematics, 22.05.2020 23:00
English, 22.05.2020 23:00
Computers and Technology, 22.05.2020 23:00