Mathematics, 01.04.2020 04:14 gigi1103

A researcher is interested in finding a 95% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 142 students who averaged 39.9 minutes concentrating on their professor during the hour lecture. The standard deviation was 12.5 minutes. Round answers to 3 decimal places where possible.
a. To compute the confidence interval use a distribution.
b. With 95% confidence the population mean minutes of concentration is between and minutes.
c. If many groups of 142 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean minutes of concentration and about percent will not contain the true population mean minutes of concentration.

A researcher is interested in finding a 95% confidence interval for the mean number minutes students

Answers: 2

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 19:30

Need now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Answers: 1

Answer

Mathematics, 21.06.2019 21:30

A.s.a.! similarity in right triangles, refer to the figure to complete this proportionc/a = a/? a.) cb.) hc.) rd.) s

Answers: 1

Answer

Mathematics, 21.06.2019 22:00

James is playing his favorite game at the arcade. after playing the game 33 times, he has 88 tokens remaining. he initially had 2020 tokens, and the game costs the same number of tokens each time. the number tt of tokens james has is a function of gg, the number of games he plays

Answers: 1

Answer

Mathematics, 21.06.2019 23:00

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.

Answers: 1

Answer

You know the right answer?

A researcher is interested in finding a 95% confidence interval for the mean number minutes students...

Questions