According the World Health Organization, the Body Mass Index (BMI=Weight in Kilograms/Height in Meters^2) of a healthy 5-year old girl is 15. After Palmyra, Syria, got liberated from the Islamic State, the World Food Program asks you to conduct an early assessment situation of the nutritional situation in Palmyra. You measure the height and weight of a random sample of 225 five-year old girls and obtain a sample BMI average of �¯=14.5785 and a sample standard deviation of s=2.25. Test at �=0.01 the hypothesis that the children of Palmyra are undernourished as measured by the BMI. Why would you use a low alpha? A To minimize the probability to make a Type I error B To minimize the probability to make a Type II error C Because this is what researchers typically use D None of the above What is your H0? A: =13 B: =14 C: =15 D: none of the above What is your HA? A: <15 B: >= 15 C: =/ 15 D: none of the above
According the World Health Organization, the Body Mass Index (BMI=Weight in Kilograms/Height in Meters^2) of a healthy 5-year old girl is 15. After Palmyra, Syria, got liberated from the Islamic State, the World Food Program asks you to conduct an early assessment situation of the nutritional situation in Palmyra. You measure the height and weight of a random sample of 225 five-year old girls and obtain a sample BMI average of �¯=14.5785 and a sample standard deviation of s=2.25. Test at �=0.01 the hypothesis that the children of Palmyra are undernourished as measured by the BMI.
Why would you use a low alpha?
|
A
|
To minimize the probability to make a Type I error |
|
B
|
To minimize the probability to make a Type II error |
|
C
|
Because this is what researchers typically use |
|
D
|
None of the above |
What is your H0?
A: =13
B: =14
C: =15
D: none of the above
What is your HA?
A: <15
B: >= 15
C: =/ 15
D: none of the above
The question requires you to conduct a _____ -tailed test.
A: one
B: two
C: three
Given the sample size of n=225, you can work with the _____ -table.
A: F
B: Z
C: T
D: X^2
How many standard errors away from the hypothesized healthy population mean of BMI=15 would the sample mean of �¯=14.5785 have to be away for you to reject the null hypothesis at the �=0.01 significance level.
|
A:
|
-2.81 |
|
B:
|
+2.81 |
|
C:
|
-2.325 |
|
D:
|
+2.325 |
How many standard errors away from the hypothesized healthy population mean of 15 is the sample mean of �¯=14.5785 ?
Using the correct statistical language, what do you find?
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A:
|
You accept the alternative |
|
B:
|
You reject the null |
|
C:
|
You fail to reject the null |
|
D:
|
You accept the null |
What's the probability that you made a Type I error?
|
A:
|
Half a percent |
|
B:
|
A quarter of a percent |
|
C:
|
Three quarters of a percent |
|
D:
|
There is no Type I Error |
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