Suppose a geyser has a mean time between eruptions of 76

Assignment Help Basic Statistics

Reference no: EM13606462

Suppose a geyser has a mean time between eruptions of 76 minutes. Let the interval of time between the eruptions be normally distributed with standard deviation 27 minutes. (round everything to four decimal places)

a) What is the probability that a randomly selected time interval between eruptions is longer than 87 minutes?

b) What is the probability that a random sample of 14 time intervals between eruptions has a mean longer than 87 minutes?

c) What is the probability that a random sample of 26 time intervals between eruptions has a mean longer than 87 minutes?

d) What effect does increasing the sample size have on the probability? Fill in the blanks with either increases or decreases.

If the population mean is less than 87 minutes, then the probability that the sample mean of the time between eruptions is greater than 87 minutes ______ because the variability in the sample mean _____ as the sample size _____ .

e) What might you conclude if a random sample of 26 time intervals between eruptions has a mean longer than 87 minutes? Choose the best answer.

A) The population mean must be more than 76, since the probability is so low.

B) The population mean is 76, and this is an example of a typical sampling result.

C) The population mean must be less than 76, since the probability is so low.

D) The population mean may be greater than 76.

Reference no: EM13606462

Questions Cloud

An order for an automobile can select the base model or add : an order for an automobile can select the base model or add any number of 11 options. the random variable is the number

Abis corporation uses the weighted-average method in its : abis corporation uses the weighted-average method in its process-costing system. this month the beginning inventory in

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 10-minute oil-change facility is unknown.

Find the frequency ration rwwn at which the amplitude of a : find the frequency ration rwwn at which the amplitude of a single degree of freedom damped system attains the maximum

Suppose a geyser has a mean time between eruptions of 76 : suppose a geyser has a mean time between eruptions of 76 minutes. let the interval of time between the eruptions be

What is the difference between statistical significance and : what is the difference between statistical significance and practical significance? why is statistical significance not

Km ries tere bax and josh thomas invested 36000 52000 and : kim ries tere bax and josh thomas invested 36000 52000 and 60000 respectively in a partnership. during its first

White corporations financial accounting records disclose : white corporations financial accounting records disclose the following results for the period ending december 31 of

If the temperature measurement can be made within 1 degree : a pressurized tank is nominally at 205 degree c. the density determination must be within 0.5 to be useful. if the

User Account

All Pages