The shape of the distribution of the time required to get

Reference no: EM13603092

The shape of the distribution of the time required to get an oil change at a 15 minute facility is unknown. However, records indicate that the mean time is 16.1 minutes and the standard deviation is 4.6 minutes.

a) To compute the probabilities regarding the sample mean using the normal model, what size sample would be required?

b) what is the probability that a random sample of n = 40 oil changes results in a sample mean time of less than 15 minutes?

a) Choose the required sample size:

1. The normal model cannot be used if the shape is unknown

2. Sample size need to be greater than 30

3. Sample size needs to be less than 30

4. Any sample size could be used.

b) The probability is approximately? (round to 4 decimal places as needed)

Reference no: EM13603092

Questions Cloud

What is the magnitude of the acceleration of an electron at : question 1. what is the magnitude of the acceleration of an electron at a point where the electric field has magnitude

Compare annual profit when the plant is operating at 90 of : a planet operation has fixed costs of 2000000 per year and its output capacity is 100000 electrical appliances per

An automobile mileage study tested the following hypotheses : an automobile mileage study tested the following hypotheses.hypothesish0ugtor equal to 25 mpgconclusionmanufacturers

Sparr investment inc specializes in tax-deferred investment : sparr investment inc. specializes in tax-deferred investment opportunities for its clients. recently sparr offered a

The shape of the distribution of the time required to get : the shape of the distribution of the time required to get an oil change at a 15 minute facility is unknown. however

Assume you pay 010 per kw-hour for electricity how much : assume you pay 0.10 per kw-hour for electricity. how much would it cost just to keep the hot water inside the heater

If the filling equipment is adjusted so that the average : on an assembly line that fills 8-ounce cans a can will be rejected if its weight is less than 7.90 ounces. in a large

There are twelve zodiac signs and each person is born under : there are twelve zodiac signs and each person is born under exactly one sign. suppose that each sign is equally likely

Complete parts a through d for the sampling distribution of : complete parts a through d for the sampling distribution of the sample mean shown in the accompanying graph. i attached

User Account

All Pages