Suppose we are looking for evidence that the mean number of

Assignment Help Basic Statistics

Reference no: EM13614487

For several years the mean number of customers per day at a restaurant has been 142. Recently, the number of customers was counted on each of 29 randomly selected days. Over these days, the mean number of customers was 151.1 with standard deviation 26.3.

a.) Suppose we are looking for evidence that the mean number of customers has changed (increased or decreased). Carry out a formal test of significance. Be sure to write hypotheses, then use software to compute a p-value precisely (code is given below). Then reach a conclusion at the 5% level of significance.

b.) Based on the same data, construct a 95% confidence interval for the mean number of customers now. Is the number "142" in your interval? Connect this to your conclusion in (a.).

c.) Based on the same data, construct a 90% confidence interval for the mean number of customers now. Is the number "142" in your interval? Connect this to your conclusion in (a.).

d.) Thinking about your answers in (b.) and (c.), what level of confidence would you have to select so that the number "142" is right on the edge of your confidence interval? How does this relate to the p-value you obtained in (a.)? Construct this interval to demonstrate!

Reference no: EM13614487

Questions Cloud

According to the double entry system of book keeping the : 1. a business event which can be measured in terms of money and must be recorded in books of accounts is calleda.

The position of a water balloon from a 100m high cliff is : the position of a water balloon from a 100m high cliff is given by rt 3ti t2j sin3.14t2km. find the location

Suppose that you have been hired to estimate the percentage : looking for help with this one. i dont see anythign wrong off the bat it seems ok. is the sample size too small?suppose

The value of the uniform wall temperature is equal to that : air flows in a round pipe at a rate of 0.015 lbmsec. the air enters the pipe at a temperature 76.8 of and a pressure

Suppose we are looking for evidence that the mean number of : for several years the mean number of customers per day at a restaurant has been 142. recently the number of customers

The gas is held at constant pressure as the energy is : a container of ideal gas for which the thermal energy is given by eth 2.6 n r t is initially at pressure pi 1.1 x

An electron is released from rest at the point midway : two stationary positive point charges charge 1 of magnitude 3.15nc and charge 2 of magnitude 1.75nc are separated by a

For the following z-acoresm determine the percentage of : for the following z-acoresm determine the percentage of scores that lie beyond z show workingstandard

The income statement of a corporation for the month : the income statement of a corporation for the month ofnovember indicates a net income of 200000. during the sameperiod

User Account

All Pages