Mathematics, 10.03.2020 00:21 ianmorales4894
The ability of ecologists to identify regions of greatest species richness could have an impact on the preservation of genetic diversity, a major objective of the World Conservation Strategy. A study used a sample of n = 33 lakes to obtain the estimated regression equation
y = 3.89 + 0.033x1 + 0.024x2 + 0.023x3 ? 0.0080x4 ? 0.13x5 ? 0.72x6
where y = species richness, x1 = watershed area, x2 = shore width, x3 = poor drainage (%), x4 = water color (total color units), x5 = sand (%), and x6 = alkalinity.
The coefficient of multiple determination was reported as R2 = 0.87. Carry out a test of model utility. State the appropriate hypotheses.( 4 choices )
H0: ?1 = ?1 = ... = ?6 = 0
Ha: no ?i = 0
H0: ?1 = ?1 = ... = ?6 = 0
Ha: at least one among ?1, ..., ?6 is not zero
H0: ?1 ? ?1 ? ... ? ?6 ? 0 Ha: ?1 = ?1 = ... = ?6 = 0 H0: ?1 ? ?1 ? ... ? ?6 ? 0
Ha: at least one among ?1, ..., ?6 is zero
State the rejection region and compute the test statistic value. Use ? = 0.05. Round your answers to two decimal places. rejection region f ? test statistic f = State the conclusion in the problem context.(4 choices)
Reject H0. The model is judged not useful.
Fail to reject H0. The model is judged not useful.
Fail to reject H0. The model is judged useful.
Reject H0. The model is judged useful.
Answers: 3
Mathematics, 21.06.2019 16:20, tmantooth7018
The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.
Answers: 3
Mathematics, 21.06.2019 18:00, dizzleman3030
Find the perimeter of the figure shown above. a. 40 cm c. 52 cm b. 60 cm d. 75 cm select the best answer from the choices provided
Answers: 1
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