Determining the probability of sample mean

Reference no: EM1313967

Q1) Time Spent using e-mail per session is normally distributed, with µ = 8 minutes and σ = 2 minutes. If you choose a random sample of 25 sessions,

a) Determine the probability that sample mean is between 7.8 and 8.2 minutes?

b) Determine the probability that sample mean is between 7.5 and 8 minutes?

c) If you choose random sample of 100 sessions, determine the probability that sample mean is between 7.8 and 8.2 minutes?

d) Describe the difference in result of (a) and (b).

Reference no: EM1313967

Questions Cloud

Fluctuations in the economys real growth rate : If the fluctuations in the economy's real growth rate from year to year are caused primarily by variations in the rate at which aggregate delivery increases

Tax impact on labour supply curve and short run : Describe (in a sentence or two) the short run profit maximization condition when labour is the only variable input? What will happen to the labour demand if price of the output goes up?

Distinct entity from the owners : Which organizational form allows the business to be a separate, distinct entity from the owners

Expected cost of medical expenses to this population : Illustrate what would be the insurance premium. Or in other words illustrate what is the expected cost of medical expenses to this population.

Determining the probability of sample mean : Determine the probability that sample mean is between 7.5 and 8 minutes?

Single proportion z test : To test the given claim using Single Proportion Z test.

Describe theory on discounted cash flows method : Describe theory on discounted cash flows method in Capital Budgeting but assets cannot be valued soundly if we do not have well-functioning capital markets

Factors which impact productivity growth by subsidization : Physical capital, Natural resources, Human Capital and Technical Knowledge, should it be Government policy to subsidize the production or acquisition of all or these?

One year rate of return earned from her purchase : Hana's rounded one-year rate of return earned from her purchase of the Treasury notes is equal to illustrate what %.

User Account

All Pages