Can you please help with the following assigment? Attacted is the ilab

 ATTACHMENT PREVIEW Download attachmentMATH 221 Statistics for Decision MakingWeek 6 iLabName:_______________________Statistical Concepts:Data SimulationConfidence IntervalsNormal ProbabilitiesShort Answer Writing AssignmentAll answers should be complete sentences.We need to find the confidence interval for the SLEEP variable.To do this, we need tofind the mean and then find the maximum error.Then we can use a calculator to find theinterval, (x – E, x + E).First, find the mean.Under that column, in cell E37, type=AVERAGE(E2:E36).Underthat in cell E38, type=STDEV(E2:E36).Now we can find the maximum error of theconfidence interval.To find the maximum error, we use the “confidence” formula.Incell E39, type=CONFIDENCE.NORM(0.05,E38,35).The 0.05 is based on theconfidence level of 95%, the E38 is the standard deviation, and 35 is the number in oursample.You then need to calculate the confidence interval by using a calculator tosubtract the maximum error from the mean (x-E) and add it to the mean (x+E).1.Give and interpret the 95% confidence interval for the hours of sleep a student gets.(5 points)Then, you can go down to cell E40 and type=CONFIDENCE.NORM(0.01,E38,35)tofind the maximum error for a 99% confidence interval.Again, you would need to use acalculator to subtract this and add this to the mean to find the actual confidence interval.2.Give and interpret the 99% confidence interval for the hours of sleep a student gets.(5 points)3.Compare the 95% and 99% confidence intervals for the hours of sleep a student gets.Explain the difference between these intervals and why this difference occurs. (5points)

View the AnswerIn the week 2 lab, you found the mean and the standard deviation for the HEIGHTvariable for both males and females.Use those values for follow these directions tocalculate the numbers again.(From week 2 lab: Calculate descriptive statistics for the variable Height by Gender.Click onInsertand thenPivot Table.Click in the top box and select all the data(including labels) fromHeightthroughGender.Also click on “new worksheet” andthenOK.On the right of the new sheet, click onHeightandGender, making sure thatGenderis in theRowsbox andHeightis in theValuesbox.Click on the down arrownext toHeightin theValuesbox and selectValue Field Settings.In the pop up box,clickAveragethenOK.Write these down.Then click on the down arrow next toHeightin theValuesbox again and selectValue Field Settings.In the pop up box, clickonStdDevthenOK.Write these values down.)You will also need the number of males and the number of females in the dataset.Youcan either use the same pivot table created above by selectingCountin theValue FieldSettings, or you can actually count in the dataset.Then in Excel (somewhere on the data file or in a blank worksheet), calculate themaximum error for the females and the maximum error for the males.To find themaximum error for the females, type=CONFIDENCE.T(0.05,stdev,#), using thefemales’ height standard deviation for “stdev” in the formula and the number of femalesin your sample for the “#”.Then you can use a calculator to add and subtract thismaximum error from the average female height for the 95% confidence interval.Do thisagain with 0.01 as the alpha in the beginning of the formula to find the 99% confidenceinterval.Find these same two intervals for the male data by using the same formula, but using themales’ standard deviation for “stdev” and the number of males in your sample for the “#”.4.Give and interpret the 95% confidence intervals for males and females on theHEIGHT variable.Which is wider and why?(7 points)5.Give and interpret the 99% confidence intervals for males and females on theHEIGHT variable.Which is wider and why?(7 points)

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