One researcher wishes to estimate the mean number of hours that high school students spend watching...
One researcher wishes to estimate the mean number of hours that high school students spend watching TV on a weekday. A margin of error of 0.29 0.29 hour is desired. Past studies suggest that a population standard deviation of 2.4 2.4 hours is reasonable. Estimate the minimum sample size required to estimate the population mean with the stated accuracy. The required sample size is nothing . (Round up to the nearest whole numbe
These are the only numbers I was given, I am not sure what the confidence level is, 1.96??
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One researcher wishes to estimate the mean number of hours that
high school students spend watching...
One researcher wishes to estimate the mean number of hours that high school students spend watching...
One researcher wishes to estimate the mean number of hours that high school students spend watching TV on a weekday. A margin of error of 0.27 hour is desired. Past studies suggest that a population standard deviation of 1.5 hours is reasonable. Estimate the minimum sample size required to estimate the population mean with the stated accuracy. The required sample size is (Round up to the nearest whole number.)
An advertising executive wants to estimate the mean weekly amount of time consumers spend watching traditional...
An advertising executive wants to estimate the mean weekly amount of time consumers spend watching traditional television daily. Based on previous studies, the standard deviation is assumed to be 26 minutes. The executive wants to estimate, with 99% confidence, the mean weekly amount of time to within ±33 minutes. a. What sample size is needed? b. If 95% confidence is desired, how many consumers need to be selected? a. The sample size required for 99% confidence is ___
An advertising executive wants to estimate the mean weekly amount of time consumers spend watching traditional...
An advertising executive wants to estimate the mean weekly amount of time consumers spend watching traditional television daily. Based on previous studies, the standard deviation is assumed to be 22 minutes. The executive wants to estimate, with 99% confidence, the mean weekly amount of time to within ± 6 minutes. a. What sample size is needed? b. If 95% confidence is desired, how many consumers need to be selected? (Round up to the nearest integer.)
A newspaper article reported that people spend a mean of 7.5 hours per day watching TV,...
A newspaper article reported that people spend a mean of 7.5 hours per day watching TV, with a standard deviation of 1.8 hours. A psychologist would like to conduct interviews with the of the 10 % population who spend the most time watching TV. She assumes that the daily time people spend watching TV is normally distributed. At least how many hours of daily TV watching are necessary for a person to be eligible for the interview? Carry your intermediate...
An advertising media analyst wants to estimate the mean weekly amount of time consumers’ spend watching...
An advertising media analyst wants to estimate the mean weekly amount of time consumers’ spend watching television daily. Based on previous studies, the standard deviation is assumed to be 20 minutes. The media analyst wasn’t to estimate, with 99% confidence, the mean weekly amount of time to within +/- 5 minutes. a) What sample sizes is needed b) If 95% confidence is desired, how many consumers need to be selected?
The amount of time adults spend watching television is closely monitored by firms because this helps...
The amount of time adults spend watching television is closely monitored by firms because this helps to determine advertising pricing for commercials. Complete parts (a) through (d). (a) Do you think the variable "weekly time spent watching television" would be normally distributed? If not, what shape would you expect the variable to have? O A. The variable 'weekly time spent watching television is likely symmetric, but not normally distributed O B. The variable 'weekly time spent watching television is likely...
A researcher wants to determine a 99% confidence interval for the mean number of hours that adults spend per week doing...
A researcher wants to determine a 99% confidence interval for the mean number of hours that adults spend per week doing community service. How large a sample should the researcher select so that the estimate is within 1.4 hours of the population mean? Assume that the standard deviation for time spent per week doing community service by all adults is 3 hours.
The amount of time adults spend watching television is closely monitored by firms because this helps...
The amount of time adults spend watching television is closely monitored by firms because this helps to determine advertising pricing for commercials. Complete parts (a) through (d). (a) Do you think the variable weekly time spent watching television would be normaly distributed? If not, what shape would you expect the variable to have? O A The variable weekly time spent watching television is likely normally distributed OB. The variable weekly time spent watching television is kely skewed right not normally...
A survey asked people, "How many hours do you spend watching reality TV shows per week?"....
A survey asked people, "How many hours do you spend watching reality TV shows per week?". From a random sample of 1200 people, sample mean was 9.5 and the (sample) standard deviation was 3.1 hours. Construct a 90% confidence interval for population mean A (6.4, 12.6) B. Cannot compute based on the given information. C-19.32, 9.68) D.(4.4, 15.6) E. (9.35, 9.65) QUESTION 20 (Continue from the previous question) what is the minimum required sample size to make sure that the...
A researcher wants to estimate how many hours per week students who love off campus spend...
A researcher wants to estimate how many hours per week students who love off campus spend driving to campus. A simple random sample of 84 students had a mean of 5.0 hours of driving. Construct and interpret a 90% confidence interval for the mean number of hours a student drives per week. Assume the population standard deviation is known to be 0.3 hours per week.
One researcher wishes to estimate the mean number of hours that high school students spend watching TV on a weekday. A margin of error of 0.27 hour is desired. Past studies suggest that a population standard deviation of 1.5 hours is reasonable. Estimate the minimum sample size required to estimate the population mean with the stated accuracy. The required sample size is (Round up to the nearest whole number.)
The amount of time adults spend watching television is closely monitored by firms because this helps to determine advertising pricing for commercials. Complete parts (a) through (d). (a) Do you think the variable "weekly time spent watching television" would be normally distributed? If not, what shape would you expect the variable to have? O A. The variable 'weekly time spent watching television is likely symmetric, but not normally distributed O B. The variable 'weekly time spent watching television is likely...
The amount of time adults spend watching television is closely monitored by firms because this helps to determine advertising pricing for commercials. Complete parts (a) through (d). (a) Do you think the variable weekly time spent watching television would be normaly distributed? If not, what shape would you expect the variable to have? O A The variable weekly time spent watching television is likely normally distributed OB. The variable weekly time spent watching television is kely skewed right not normally...
A survey asked people, "How many hours do you spend watching reality TV shows per week?". From a random sample of 1200 people, sample mean was 9.5 and the (sample) standard deviation was 3.1 hours. Construct a 90% confidence interval for population mean A (6.4, 12.6) B. Cannot compute based on the given information. C-19.32, 9.68) D.(4.4, 15.6) E. (9.35, 9.65) QUESTION 20 (Continue from the previous question) what is the minimum required sample size to make sure that the...
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