Previous Problem List Next (1 point) For each situation, state the null and alte

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Previous Problem List Next (1 point) For each situation, state the null and alternative hypotheses: (Type "mu" for the symbol , eg. mu > 1 for the mean isgreater than 1, mu = 1 for the mean is greater than or equal to 1, Please do not include units such as "mm" or "S"in your answer.) (a) The manufacturer claims the diameter of a spindle in a small motor is supposed to be 4.9 millimeters (mm) with a standard manufacturer measures the diameter in a sample of 15 spindles to determine whether the mean diameter has moved away trom the required measurement. Suppose the sample has an average diameter of 5.03 mm Ho deviation of 0.14 mm. If the spindle is either too small or too large, the motor will not work properly. The Ha (b) Harry thinks that prices in Caldwell are higher than the rest of the country. He reads that the na price of a certain brand of laundry detergent is $22.65 with standard deviation $2.26. He takes a sample from 5 local Caldwell stores and finds the average price for this same brand of detergent is $21.70. Ho Ha Note: You can earn partial credit on this problem. Preview My Answers Submit Answers

Explanation / Answer

ans1) (a) H0: mu=4.9

H1: mu not =4.9

Null Hypothesis: As per the manufacture the mean of diameter should be exactly 4.9mm and if it increases or decreases then this value, the motor will not work properly.

Alternate Hypothesis: The manufacturer wants to check from the sample if the value has moved a way a bit from the desired value either less or more.

ans1(b) H0: mu <=22.65

Null Hypothesis:As harry thinks that cadwell has more prices of detergents than other stores, null hypothesis will be that the mean price of detergent at cadwell is less or equal than the other.

H1: mu>22.65

Alternate hypothesis: Cadwell has more prices than other stores for detergents.

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