For each situation, state the null and alternative hypotheses: (Type mu for the symbol . e.g....

Transcribed Image Text:

For each situation, state the null and alternative hypotheses: (Type "mu" for the symbol . e.g. mu> 1 for the mean is greater than 1, <1 for the mean is less than 1, mu not = 1 for the mean is not equal to 1. Please do not include units such as "mm" or "$" in your ans (a) The diameter of a spindle in a small motor is supposed to be 6.5 millimeters (mm) with a standard deviation of 0.13 mm. If the spine either too small or too large, the motor will not work properly. The manufacturer measures the diameter in a sample of 51 spindles to determine whether the mean diameter has moved away from the required measurement. Suppose the sample has an average diamete 6.59 mm. Ho H (b) Harry thinks that prices in Caldwell, Idaho, are higher than the rest of the country. He reads that the nationwide average price of a certain brand of laundry detergent is $17.65 with standard deviation $1.67. He takes a sample from 44 local Caldwell stores and finds average price for this same brand of detergent is $15.86. Ho | Ha I Q Search myhp n For each situation, state the null and alternative hypotheses: (Type "mu" for the symbol . e.g. mu> 1 for the mean is greater than 1, <1 for the mean is less than 1, mu not = 1 for the mean is not equal to 1. Please do not include units such as "mm" or "$" in your ans (a) The diameter of a spindle in a small motor is supposed to be 6.5 millimeters (mm) with a standard deviation of 0.13 mm. If the spine either too small or too large, the motor will not work properly. The manufacturer measures the diameter in a sample of 51 spindles to determine whether the mean diameter has moved away from the required measurement. Suppose the sample has an average diamete 6.59 mm. Ho H (b) Harry thinks that prices in Caldwell, Idaho, are higher than the rest of the country. He reads that the nationwide average price of a certain brand of laundry detergent is $17.65 with standard deviation $1.67. He takes a sample from 44 local Caldwell stores and finds average price for this same brand of detergent is $15.86. Ho | Ha I Q Search myhp n