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Final

QMS CRIB SHEET (FINAL).doc

2 Pages
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Department
Quantitative Methods
Course Code
QMS 202
Professor
Clare Chua

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Description
The director of patient services of a large health maintenance x350organization wants to evaluate patient waiting time at a local facility A random sample of 25 patients is selected from the appoint book The waiting time is defined as the time from when the patient signs in to when he or she is seen by the doctor The 4 The 95 confidence interval estimate of the true average life of following data represents the waiting times in minuteslight bulbs in this shipment is 3255037450 x is known5 State your interpretation of the 95 confidence interval constructed in part 4 The average life span of all light bulbs 195305456398296produced in a factory is between 32550 hours and 37450 254218286520254hours 95 of the time2613114314912710712119459425A sample of 20 students were asked to fill in a survey on 413138174390366gender how many hours spent studying for the test and what Construct a 95 confidence interval estimate of the pop avg waitingwas the grade earned on the same test that they had studiedtime for1 State the necessary assumptionsconditions required to Hours Male 14 Female 17 Female 3 Female 6 Male 17 Male 3 construct a 95 confidence interval estimate for the population Male 8 Male 4 Female 20 Male 15 Female 7 Male 9 Male 0 Male 5 average waiting timeFemale 11 Female 15 Male 18 Female 13 Male 8 Male 4 It is not normally distributed n is not equal or greater than Construct a 91 confidence interval estimate of the proportion of all 30 female students Apply CLT no because n25a What parameter are you estimating hereAssume x is normally distributed b Statecheck the necessary assumptions required to construct the 2 State the critical value needed to construct the 95 confidence confidence interval interval estimate for the population average waiting time np520 8208 t critical values 2064 Calc Dist t Invt Area 0025 df n1p20 18201224The conditions are met therefore it is normally distributed c Before you construct a 91 confidence interval estimate of the proportion of all female students state the critical value z 16954 InvN Area 091 1 03 State the point estimate and its value used to construct a 95 d The point estimate for a 91 confidence interval estimate of the confidence interval estimate for the population average waiting time proportion of all female students is x985x27892 Calc INTR t 1s List Clevel 095e State the 91 confidence interval estimate of the population proportion of all female students 0214305857Calc INTR z 1p Clevel 091 x8 n204 The 95 confidence interval estimate for the population average A survey is planned to determine the mean annual family waiting time is 221668939336171261 medical expenses of employees of a large company TheCalc INTR t 1s List Clevel 095 left and right values management of the company wishes to be 95 confident that 5 State your interpretation of the 95 confidence interval the sample mean is correct to within 50 of the population constructed in part 4mean annual family medical expenses A previous studyThe average waiting time in minutes of all patients is
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