Number of Jobs A sociologist found that in a sample of 45 retired men, the average number of jobs they had during their lifetimes was 7.2. The population standard deviation is 2.4. Part: 0 / 4 Part 1 of 4 (a) Find the best point estimate of the mean. The best point estimate of the mean is X

Number of Jobs A sociologist found that in a sample of 57 retired men, the average number of jobs they had during their lifetimes was 7.3. The population standard deviation is 2.1. Use a graphing calculator and round the answers to one decimal place. Part: 0 / 4 Part 1 of 4 The best point estimate of the mean is

The __________ __ __ ______ of a random sample is the graph of its theoretical normal percentiles paired with corresponding actual percentiles of the random sample. A. scatterplot B. normal q-q plot C. fitted histogram D. unbiased estimator

Number of Jobs A sociologist found that in a sample of  49  retired men, the average number of jobs they had during their lifetimes was  6.8 . The population standard deviation is  2.4 . Use a graphing calculator and round the answers to one decimal place.   Part: 0 / 4 0 of 4 Parts Complete   Part 1 of 4         The best point estimate of the mean is    .       ??

Need help on a and finding the t and p value

You review your data from a population A and population B. The mean and standard deviation are noted as N(mean, standard deviation). NA(400,10) and NB(300,25). 95 percent of the observations for population A exceed a value of___________?95 percent of the observations for population B are less than a value of _____________?

Summary data Fall semester Spring semester 27 72.4 Number of students 26 69.7 11 Mean final exam score Standard deviation final exam 9.1 Score

Detecting gypsy moths The gypsy moth is a serious threat to oak and aspen trees. A state agriculture department places traps throughout the state to detect the moths. Each month, an SRS of 50 traps is inspected, the number of moths in each trap is recorded, and the mean number of moths is calculated. Based on years of data, the distribution of moth counts is discrete and strongly skewed with a mean of 0.5 and a standard deviation of 0.7. a. Explain why it is reasonable to use a Normal distribution to approximate the sampling distribution of for SRSS of size 50. b. Estimate the probability that the mean number of moths in a sample of size 50 is greater than or equal to 0.6. c. In a recent month, the mean number of moths in an SRS of size 50 was = 0.6. Based on this result, is there convincing evidence that the moth population is getting larger in this state? Explain your reasoning.