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bA sample of 150 snudents selected randomly from a population of students in college. Their ages...
The ages of a group of randomly selected adult females have a standard deviation of years. Assume that the ages of female statistics students have less variation than ages of females in the general population, so let years for the sample size calculat
The ages of a group of 136 randomly selected adult females have a standard deviation of 16.8 years. Assume that the ages of female statistics students have less variation than ages of females in the general population, so let σ=16.8 years for the sample size calculation. How many female statistics student ages must be obtained in order to estimate the mean age of all female statistics students? Assume that we want 95% confidence that the sample mean is within one-half...
A survey of 25 randomly selected customers found the ages shown? (in years). The mean is...
A survey of 25 randomly selected customers found the ages shown? (in years). The mean is 33.16 years and the standard deviation is 9.21 years. 47 35 45 21 30 42 49 29 28 35 27 29 45 35 11 34 28 33 44 39 34 25 34 32 18 a) What is the 90% confidence interval for the mean age of all customers assuming that the assumptions and conditions for the confidence interval have been met? b) What is...
A store owner surveyed 25 randomly selected customers and found the ages shown (in years). The...
A store owner surveyed 25 randomly selected customers and found the ages shown (in years). The mean is 32.36 and the standard deviation is 11.79. The owner wants to know f the mean age of all customers is 36 years old. Use the given information to complete parts a through . 14 12 18 22 16 42 48 44 28 40 41 3743 44 38 16 20 39 48 31 30 34 21 47 36 a) What is the null...
Question Four a) The mean monthly sale of an insurance company is Kshs.81, 590. The manager...
Question Four a) The mean monthly sale of an insurance company is Kshs.81, 590. The manager designed a program to improve sales. Ten agents were selected randomlyto participate in the program. Their monthly sales were recorded in thousands as follows: By testing hypothesis, does this data provide enough evidence to indicate that the program was a success? b) A sample of 150 students selected randomly from a population of students in college. Their agesare presented in the table below: Age...
A survey of 25 randomly selected customers found the ages shown (in years). The mean is...
A survey of 25 randomly selected customers found the ages shown (in years). The mean is 32.28 years and the standard deviation is 9.35 31 21 44 32 34 11 48 42 23 45 39 35 31 28 29 43 34 37 20 44 33 27 24 a) Construct a 80% confidence interval for the mean age of all customers, assuming that the assumptions and conditions for the confidence interval have been met. b) How large is the margin of...
The ages of a group of 121 randomly selected adult females have a standard deviation of...
The ages of a group of 121 randomly selected adult females have a standard deviation of 10 years Assume that the age of fomate statistics students have less wanation than ages of females in the general population, so leta 10.9 years for the sample size calculation How many female stics student ages must be obtained in order to estimate the mean age of a female sialistics Students Assume that we want 90% confidence that the sample mean is within one-half...
The ages of a group of 126 randomly selected adult females have a standard deviation of...
The ages of a group of 126 randomly selected adult females have a standard deviation of 16.7 years. Assume that the ages of female statistics students have less variation than ages of females in the general population, so let sigmaequals16.7 years for the sample size calculation. How many female statistics student ages must be obtained in order to estimate the mean age of all female statistics students? Assume that we want 90% confidence that the sample mean is within one-half...
The ages of a group of 156156 randomly selected adult females have a standard deviation of...
The ages of a group of 156156 randomly selected adult females have a standard deviation of 16.516.5 years. Assume that the ages of female statistics students have less variation than ages of females in the general population, so let sigmaσequals=16.516.5 years for the sample size calculation. How many female statistics student ages must be obtained in order to estimate the mean age of all female statistics students? Assume that we want 9898% confidence that the sample mean is within one-half...
The ages of a group of 154 randomly selected adult females have a standard deviation of...
The ages of a group of 154 randomly selected adult females have a standard deviation of 17.6 years. Assume that the ages of female statistics students have less variation than ages of females in the general population, so let σ equals=17.6 years for the sample size calculation. How many female statistics student ages must be obtained in order to estimate the mean age of all female statistics students? Assume that we want 98% confidence that the sample mean is within...
A survey of 25 randomly selected customers found the ages shown (in years). The mean is...
A survey of 25 randomly selected customers found the ages shown (in years). The mean is 33.60 years and the standard deviation is 9.52 years a) Construct a 90% confidence interval for the mean age of all customers, assuming that the assumptions and conditions for the confidence interval have been met. b) How large is the margin of error? c) How would the confidence interval change if you had assumed that the standard deviation was known to be 10.0 years?...
A store owner surveyed 25 randomly selected customers and found the ages shown (in years). The mean is 32.36 and the standard deviation is 11.79. The owner wants to know f the mean age of all customers is 36 years old. Use the given information to complete parts a through . 14 12 18 22 16 42 48 44 28 40 41 3743 44 38 16 20 39 48 31 30 34 21 47 36 a) What is the null...
Question Four a) The mean monthly sale of an insurance company is Kshs.81, 590. The manager designed a program to improve sales. Ten agents were selected randomlyto participate in the program. Their monthly sales were recorded in thousands as follows: By testing hypothesis, does this data provide enough evidence to indicate that the program was a success? b) A sample of 150 students selected randomly from a population of students in college. Their agesare presented in the table below: Age...
A survey of 25 randomly selected customers found the ages shown (in years). The mean is 32.28 years and the standard deviation is 9.35 31 21 44 32 34 11 48 42 23 45 39 35 31 28 29 43 34 37 20 44 33 27 24 a) Construct a 80% confidence interval for the mean age of all customers, assuming that the assumptions and conditions for the confidence interval have been met. b) How large is the margin of...
The ages of a group of 121 randomly selected adult females have a standard deviation of 10 years Assume that the age of fomate statistics students have less wanation than ages of females in the general population, so leta 10.9 years for the sample size calculation How many female stics student ages must be obtained in order to estimate the mean age of a female sialistics Students Assume that we want 90% confidence that the sample mean is within one-half...
A survey of 25 randomly selected customers found the ages shown (in years). The mean is 33.60 years and the standard deviation is 9.52 years a) Construct a 90% confidence interval for the mean age of all customers, assuming that the assumptions and conditions for the confidence interval have been met. b) How large is the margin of error? c) How would the confidence interval change if you had assumed that the standard deviation was known to be 10.0 years?...
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