Statistics for Bus Cont and Forecast Models

HW 10 1) The file Gesell.xls concerns a study of whether intelligence can be predicted based on the age at which a child starts to speak. For each of 2l participants in the study, the variable Age represents the age (in months) at which they spoke their first word, and the variable Score represents the Gesell Adaptive Score. (The Gesell test is an adult intellig

STAT-UB | 103 | Statistics for Bus Cont and Forecast Models | homework | HW 10 1) The file Gesell.xls c

HW 7 1) Sincich, Ex. 6.3. 2) Sincich, Ex. 6.21. 3) Sincich, Ex. 6.31. 4) Sincich, Ex. 6.45. 5) Sincich, Ex. 6.53. 6) Recall the data set NormTemp, which you studied in Homework 1. This gives data on body temperatures for 130 randomly selected subjects. Using Minitab, get a confidence interval for the population mean temperature. To do this, first read the data

STAT-UB | 103 | Statistics for Bus Cont and Forecast Models | homework | HW 7 1) Sincich  Ex. 6.3. 2) S

HW 1 1) A group of college students believes that herbal tea has remarkable restorative powers. To test this belief, they make weekly visits to a local nursing home, visiting with the residents and serving them herbal tea. The nursing home staff reports that after several months most of the residents are more cheerful and healthy. A skeptical sociologist co

STAT-UB | 103 | Statistics for Bus Cont and Forecast Models | homework | HW 1 1) A group of college stu

HW6 1) According to a recent survey, 30% of credit card holders pay off their balances in full each month. If a random sample of 400 credit card holders is taken, what is the probability that A) At least 110 of them pay off their balances in full each month? B) At least 125 and but less than140 of them pay off their balances in full each month? 2) The daily returns on a p

STAT-UB | 103 | Statistics for Bus Cont and Forecast Models | homework | HW6 1) According to a recent s

HW3 1) The probability that a train leaves on time is 0.85. The probability that it leaves on time and arrives on time is 0.60. If it leaves on time, what is the probability that it will arrive on time? 2) NASA estimated that the chance of a “critical-item failure” (that is, a catastrophic failure) within the U.S. Space Shuttle’s main engines is 1 in 63 for each mis

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