1. Feature movie lengths (in hours) were measured for all movies shown in the past year in the U.S. The mean length of all feature length movies shown was 1.80 hours with a standard deviation of 0.15 hours. Suppose the length of a random sample of 20 movies was recorded from all movies released this year. The mean length of the feature length movies was found to be 1.72 hours with a standard deviation of 0.18 hours.
Suppose we were to make a histogram of the feature length movie times of all movies in the past year. The histogram would be a display of which of the following?
Select one:
a. distribution of a sample
b. Normal distribution
c. population distribution
d. sampling distribution of means
2. Feature movie lengths (in hours) were measured for all movies shown in the past year in the U.S. The mean length of all feature length movies shown was 1.80 hours with a standard deviation of 0.15 hours. Suppose the length of a random sample of 20 movies was recorded from all movies released this year. The mean length of the feature length movies was found to be 1.72 hours with a standard deviation of 0.18 hours.
Suppose the process of taking random samples of size 20 is repeated 200 times and a histogram of the 200 sample means is created. The histogram would be a display of which of the following?
Select one:
a. Normal distribution
b. distribution of a sample
c. population distribution
d. sampling distribution of means
1. Feature movie lengths (in hours) were measured for all movies shown in the past year...
Feature movie lengths (in hours) were measured for all movies shown in the past year in the U.S. The mean length of all feature length movies shown was 1.80 hours with a standard deviation of 0.15 hours. Suppose the length of a random sample of 20 movies was recorded from all movies released this year. The mean length of the feature length movies was found to be 1.72 hours with a standard deviation of 0.18 hours. In this example, the...
a5. (E points) Feature moxie lengths bours) were measured for all movies shown i year in the U.S. The mesn length of feature length movies shown stamdurd deriation of Q15 hours Suppose the length of a random sample recorded Som al moties relessed this year. was 1.80 hours with of 20 movies wa What is the standand emor for the estimated mean feature length movie time of the 20 randon selected mories Round to the mearest thousandth. a) 0356 b)...
please write clearly thank you very much 6. (20 pts) A sprint duathlon consists of a 5 km run, a 20 km bike ride, followed by another 5 km run. The mean finish time of all participants in a recent duathlon deviation of 0.25 hours. Suppose a random sample of 30 participants finishing ti was 1.67 hours with a standard was taken and the mean me was found to be 1.59 hours with a standard deviation of 0.30 hours. (a)...
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean mu equals 205 days and standard deviation sigma equals 17 days. Suppose a random sample of 17 pregnancies is obtained. Describe the sampling distribution of the sample mean length of pregnancies. The sampling distribution of x is
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean mu equals 281 days μ=281 days and standard deviation sigma equals 28 days. (b) Suppose a random sample of 21 pregnancies is obtained. Describe the sampling distribution of the sample mean length of pregnancies. The sampling distribution of x is _____ (skewed left, skewed right, normal) with u-x = _____ and o-x= _____. (Round to 4 decimal places as needed)
A random group of thirty customers at a local theater was interviewed regarding their movie viewing habits. The following responses were obtained for the question, "How many times during the past month did you go to the movies?" 1. Number of movies attended 0 1 2 3 4 Number of customers 10 8 6 Construct the probability distribution for X- number of times to attend a movie during the past month and construct the cumulative probability distribution for this data....
3) A random sample of 35 Hollywood movies made since the years 2010 had a mean length of 121.6 minutes, with a standard deviation of 20.4 minutes. a) Construct a 98% confidence interval for the true mean length of all Hollywood movies made since 2010. Interpret your answer. b) As of June 2013, three Ironman movies have been released, and their mean length is 127 minutes. Someone claims that the mean length of Ironman movies is less than the mean...
A random sample of 35 rabbits of a particular species was collected. The lengths of the rabbit tails were measured. From the sample, the mean tail length was found to be 3.3 cm. Assume that the population tail length has a Normal distribution with a standard deviation of 1.2 cm. From a reference book, it was stated that the mean tail length for rabbits of this particular species is 2.6 cm. A hypothesis test for the mean µ was conducted....
1) The following histogram shows the distribution of the amount of money spent on a haircut by a Math 119 class: o.1 If the mean was $33 with a standard deviation $38, can the CLT for sample means be used if we obtained 20 random Math 119 students? How about if we obtained 50? a) b) Suppose we obtained 100 random Math 119 students. Use the CLT for sample means to find the probability that the sample mean of the...
4. (10 points) The Graduate Record Examination (GRE) test scores x are normally distributed this year. The mean test score is 200 and the standard deviation is 10. Random test scores samples of size 30 are drawn. (a.) Calculate the mean and standard deviation of sampling distribution of sample means. Show all work. o mean = standard deviation = isiq Sabit to o lodowa (b.) Find the probability that the mean of a sample is less that 180. Show all...