1)
2)
3)
for normal distribution z score =(X-μ)/σx | |
here mean= μ= | 16 |
std deviation =σ= | 3.000 |
sample size =n= | 35 |
std error=σx̅=σ/√n= | 0.51 |
probability =P(X>18)=P(Z>(18-16)/0.507)=P(Z>3.94)=1-P(Z<3.94)=1-1=0.0000 |
4)
probability =P(X>18)=P(Z>(18-18.25)/0.507)=P(Z>-0.49)=1-P(Z<-0.49)=1-0.3121=0.6879 |
(please try 0.6890 if this comes wrong)
(4 points) Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed within an average time of 14 minutes or less. If more time is required, a premium rate is charged. The testable hypotheses in this situation are H0:μ=14H0:μ=14 vs. Ha:μ>14Ha:μ>14 1. Identify the consequences of making a Type I error. A. The company charges the customer the premium rate when they should. B. The company charges the customer the premium rate when they...
#3 (4 points) Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed within an average time of 18 minutes or less. If more time is required, a premium rate is charged. The testable hypotheses in this situation are ?0:?=18 vs. ??:?>18 1. Identify the consequences of making a Type I error. A. The company does not charge the customer the premium rate when they should. B. The company charges the customer...
(4 points) Fowle Marketing Research, Inc., bases charges to a cient on the assumption that telephone surveys can be completed within an average time of 15 mminutes or less. If more time is required, a premium rate is charged The testable hypotheses in this situation are H0 : μ = 15 vs. 14: μ > 15 1. Identify the consequences of making a Type l eror A. The company charges the customer the premium rate when they should. B. The...
. Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. A sample of 35 surveys provided the survey times shown in the file named Fowle. Based upon past studies, the population standard deviation is assumed known with σ = 4 minutes. Is the premium rate justified?(a). Formulate the null...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. Suppose a sample of 35 surveys produces the data in the Microsoft Excel Online file below. Use a known σ = 3.2 minutes. Is the premium rate justified? Compute the value of the test statistic (to 2 decimals). What is...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. A sample of 35 surveys provided a mean time of 17 minutes. Based upon past studies, the population standard deviation is assumed known with σ=4. Is the premium rate justified? Compute the value of the test statistic. (Round to two...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 13 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. A sample of 35 surveys from a particular dient provided the survey times shown in the file named Fowle. Based upon past studies, the population standard deviation is assumed known with 9 minutes. Is the premium rate justified for this...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. Suppose a sample of 35 surveys produces the data in the Microsoft Excel Online file below. Use a known σ = 3.7 minutes. Is the premium rate justified? 20.3 13.7 16.2 18.1 14.3 17.3 14.6 17.4 18.5 10.2 15.1 16.6...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. Suppose a sample of 35 surveys produces the data in the Microsoft Excel Online file below. Use a known σ = 3.9 minutes. Is the premium rate justified? Open spreadsheet Formulate the null and alternative hypotheses for this application. H0:...
question 3 and 4 with work please cient on the assumpoon that phone surveys can be completed with The estate hypotheses in this station are 1 1.l .co n ces of making a Type I error 2 0 vs H an average time of 20 minutes or less > 20 more time is required a A The company changes the customer the premium rate when they should B. The company does not change the customer the premium when they should...