9. (multiple choice) if you do a hypothesis test, and you find P-value is 0.031.

Question

9. (multiple choice) if you do a hypothesis test, and you find P-value is 0.031. This means... a. If Ho is true, the probability of getting the sample result we got (or more extreme) is 0.031 b. If Ha is true, the probability of getting the sample result we got (or more extreme) is 0.031 c. The probability that Ho is true is 0.031 d. The probability that Ha is true is 0.031 10. (multiple choice) A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC) students attended the opening night midnight showing of the latest Harry Potter movie. She surveys 84 of her students and ?nds that attended the midnight showing. An appropriate alternative hypothesis is a·p=0.20 b. p> 0.20 C. p 0.20 d, p = 0.20 11. (multiple choice) Suppose a sample of bolts is selected and a confidence interval is computed. The sentence, "The 95% confidence level, in millimeters, is (4.5, 6.9) means... 95% of the bolts are between 4.5 and 6.9 mm b·The population mean will be between 4.5 and 6.9 mm 95% ofthe time C. The sample mean will be between 4.5 and 6.9 mm 95% of the time d. There is a 95% likelihood that the population mean ?of the length of bolts is somewhere between 4.5 and 6.9 mm. e, 95% ofall possible population means 's are between 4.5 and 6.9 mm

Explanation / Answer

sOLUTION9:

P=0.031

P<0.05

Reject Null hypothesis.

The probbaility that H0 is true is 0.031=3.1% by chance.

OPTIONC

Solution10:

Null hypothesis:

H0:p=20%=0.2

Alternative Hypothesis.

Ha:p<20%=0.2

OptionC

Solution11:

95% confidecne means we get the population parametr in 95 % of times and in 5% of the times we get the result which is out of interval

Confidence intrerval takes about population parameter

Here population mean

OPTIONB

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