Mathematics, 21.04.2020 06:23 moncho6222
A smelt is a type of small fish. Smelt lengths have a standard deviation of 2 cm. A simple random sample of 30 smelts has a sample mean length of 7.5 cm.
The null hypothesis is H 0 : mu=8.5 cn against : u < 8.5 cm, where u is the mean length of all smelts. What can be concluded from the test ? Use alpha=0.01 .
A reject the null hypothesis
B cannot do test without knowing the value of u
C need to use a larger value of a
D accept the null hypothesis
Answers: 3
Mathematics, 21.06.2019 21:40, ur4286
Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.
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Mathematics, 21.06.2019 23:00, serenityburke
The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?
Answers: 1
A smelt is a type of small fish. Smelt lengths have a standard deviation of 2 cm. A simple random sa...
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