Is the mean age at which American children first read now equal to four years? If the population of all American children has a mean age of 4 years until they begin to read, which of the following null and alternative hypotheses would be tested to answer this question? O b. Ho: μ = 4 vs. Ha: μ< 4 a. Ho: μ = 4 vs. Ha: μ> 4 d. Ho: μ = 4 vs. Ha: μ = 4 + x, assuming our sample size is n O c. Ho: μ = 4 vs. Ha: µ ‡ 4
Is the mean age at which American children first read now equal to four years? If the population of all American children has a mean age of 4 years until they begin to read, which of the following null and alternative hypotheses would be tested to answer this question? O b. Ho: μ = 4 vs. Ha: μ< 4 a. Ho: μ = 4 vs. Ha: μ> 4 d. Ho: μ = 4 vs. Ha: μ = 4 + x, assuming our sample size is n O c. Ho: μ = 4 vs. Ha: µ ‡ 4
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Is the mean age at which American children first
read now equal to four years? If the population
of all American children has a mean age of 4
years until they begin to read, which of the
following null and alternative hypotheses would
be tested to answer this question?
b. Ho: μ = 4 vs. Ha: μ< 4
O a. Ho: μ = 4 vs. Ha: μ > 4
d. Ho: μ = 4 vs. Ha: u = 4 + x, assuming our
sample size is n
c. Ho: μ = 4 vs. Ha: μ # 4
Transcribed Image Text:1)a)
A hypothesis test at a significance level
a
=0.09 and has a power of 0.2. What are the
probabilities of Type I and Type II errors for this
test?Please show all work
Ob P(Type 1)=0.09 and P(Type II)-0.2
O P(Type 1)=0.08 and P(Type II)-0.8
a. P(Type 1)=0.09 and P(Type II)=0.8
O c. P(Type 1)=0.91 and P(Type II)-0.8
1)b)
A hypothesis test performed by a student has a
Z value of 1.68. Is this test statistically
significant at a 5% level?
Yes, it is significant because z is larger than 1.645.
O No, it is not significant because z is smaller than
1.645.
Yes, it is significant because z is smaller than
1.960.
Yes, it is significant because z is smaller than
1.645.
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