In a Study of Monthly Household Expenditures for California Households

question 109

Multiple Choice

In a study of monthly household expenditures for California households, a UCLA research team selected a random sample of 1049 households.Average household expenditure for the sample during the month of April was $2,754, with a sample standard deviation of $243.Show the 99% confidence interval estimate of average April household expenditures for the population California households.Report the upper bound for your interval.

• A)2542.89
• B)2773.36
• C)2376.22
• D)2711.36
• E)2634.17

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Definitions:

Single-reduction

A gear configuration where the reduction of speed and increase in torque are achieved through a single stage of gearing.

Axle Hub Arrangements

The specific layout and configuration of axle hubs within a vehicle, which impacts the distribution of forces and overall vehicle stability.

Semi-floating

Describes a type of axle or bearing arrangement where the axle is partially supported by bearings or a bushing at one end, used in various mechanical applications to reduce stress and wear.

Full-floating

A type of axle design where the axle shaft only serves to transmit torque and does not bear the vehicle's weight, improving strength and durability.