revious Problem Problem List Next Problem point) For each situation, state the n
ID: 3065697 • Letter: R
Question
revious Problem Problem List Next Problem point) For each situation, state the null and alternative hypotheses: (Type "mu for the symbol pu, e.g reater than 1, mu 1 for the mean is 1 for the mean is not equal to 1. Please do not include units such as r the mean is less than 1, mu not a) The diameter of a spindle in a small motor is supposed to be 3.4 millimeters (mm) with a standard deviation of 0.15 mm. If the pindle is either too small or too large, the motor will not work properly. The manufacturer measures the diameter in a sample of 13 pindles to determine whether the mean diameter has moved away from the required measurement. Suppose the sample has an average diameter of 3.26 mm (b) Harry thinks that prices in Caldwell are higher than the rest of the country. He reads that the nationwide average price of a certain brand of laundry detergent is $19.55 with standard deviation $1.66. He takes a sample from 5 local Caldwell stores and finds the average price for this same brand of detergent is $16.91 Ho Ha Note: You can eam partial credit on this problem. Preview My Answers Submit Answers You have attempted this problem O times You have unlimited attempts remainingExplanation / Answer
a)
Answer :-
The spindle either too small or too large.
To determine the mean diameter of spindle is moved away from the required measurement.
Hypothesized mean = 3.4
Null hypothesis and alternative hypothesis is
H0 : mu < 3.4
Vs Ha : mu > 3.4
b)
Answer:
Harry thinks that the prices in Caldwell are higher than rest of the country
Hypothesized mean = 19.55
Null and alternative hypothesis is
Ho : mu = 19.55
Vs Ha : mu > 19.55 ( claim )
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