EXAM 2

Question 1

WHEN PROBLEM IS “FORWARD” ROUND Z AREA TO ___ DECIMALS

Answer 1

2 DECIMALS

Question 2

WHEN PROBLEM IS “BACKWARD” ROUND Z AREA TO ___ DECIMALS

Answer 2

CLOSEST VALUE

Question 3

ROUND Z 2 DECIMALS WHEN PROBLEM IS ___

Answer 3

“FORWARD”

Question 4

ROUND Z AREA TO CLOSEST VALUE WHEN PROBLEM IS ___

Answer 4

“BACKWARD”

Question 5

FORMULA: t-STAT, µ KNOWN, σ UNKNOWN

Answer 5

Question 6

FORMULA: CONFIDENCE INTERVAL FOR MU

Answer 6

(x_) +/- (tALPHA/2,n-1) (S / SQROOTn)

Question 7

FORMULA: PROPORTION HYPOTHESIS

Answer 7

(pBAR - p0) / (SQROOT((p(1-p)) / (n))

Question 8

80% CI, 0.1 SINGLE TAIL AREA, Z=___

Answer 8

Z = 1.28

Question 9

90% CI, 0.05 SINGLE TAIL AREA, Z=___

Answer 9

Z = 1.645

Question 10

95% CI, 0.025 SINGLE TAIL AREA, Z=___

Answer 10

Z = 1.96

Question 11

98% CI, 0.01 SINGLE TAIL AREA, Z=___

Answer 11

Z = 2.33

Question 12

99% CI, 0.005 SINGLE TAIL AREA, Z=___

Answer 12

Z = 2.575

Question 13

FORMULA: CONFIDENCE INTERVAL FOR P

Answer 13

pBAR -/+ (ZSTAT) / (SQROOT((pBAR(1 - pBAR))/n)

Question 14

THE 5 COMMON Zs RELATE TO WHAT CONCEPT?

Answer 14

CONFIDENCE INTERVAL

Question 15

FORMULA: C.I. FOR MU: SIGMA KNOWN

Answer 15

xBAR -/+ (Z,sigma/2) (SQROOT(SIGMA^2 / n))

Question 16

FORMULA: C.I. FOR MU: SIGMA UNKNOWN

Answer 16

xBAR -/+ (t,sigma/2,n-1) (SQROOT(S^2 / n))

Question 17

FORMULA: C.I. FOR MU: SIGMAS KNOWN, INDEPENDENT SAMPLES

Answer 17

L = (xBAR1 - xBAR2) -/+ (Z,apha/2) (SQRT((SIGMA1^2 / n1) + (SIGMA2^2 / n2))

Question 18

FORMULA: C.I. FOR MU: SIGMAS UNKNOWN, INDEPENDENT SAMPLES

Answer 18

L = (xBAR1 - xBAR2) -/+ (t,apha/2,d.f.) (SQRT((SIGMA1^2 / n1) + (SIGMA2^2 / n2))

Question 19

SCARY d.f.

Answer 19

Question 20

C.I. MU UNK, IND SAMPLES, EQUAL

Answer 20

Question 21

C.I. MUs UNK, DEP SAMPLES

Answer 21

Question 22

FORMULA: SAMPLE VARIANCE

Answer 22

Question 23

C.I., LARGE ns, INDEP SAMPLES

Answer 23