Question

In: Statistics and Probability

5. A large hospital took a simple random sample of 10 babies delivered at the hospital...

5. A large hospital took a simple random sample of 10 babies delivered at the hospital whose mothers intended to breastfeed. Here are the number of days until weaning for each baby: 210, 217, 240, 270, 273, 289, 324, 330, 339, 530. Is the population median number of days to weaning less than 365 (one year)? Run an appropriate test.

Solutions

Expert Solution



Related Solutions

A management consultant took a simple random sample of 10 government employees and another simple random...
A management consultant took a simple random sample of 10 government employees and another simple random sample of 10 private sector workers and measured the amount of time (in minutes) they spent in coffee breaks during the day. The results were as follows: Government Employees Private Sector Workers 23 25 18 19 34 18 31 22 28 28 33 25 25 21 27 21 32 20 21 16 Does that data provide sufficient evidence to conclude that government employees take...
A random sample of 51 newborn babies was taken at Hospital Bella Vista. The sample mean...
A random sample of 51 newborn babies was taken at Hospital Bella Vista. The sample mean was 6.87 pounds and the standard deviation was 1.76 pounds. In previous studies, the mean newborn weight was found to be 7.5 pounds. a) Does the sample from Hospital Bella Vista indicate that the mean newborn weight is less than what was found in previous studies? Use a hypothesis test with the 7-step method and the critical value method to verify if there is...
two hundred auditors each took their own simple random sample of fifteen values from a large...
two hundred auditors each took their own simple random sample of fifteen values from a large data set of account balances, and each constructed a 90% confidence interval for the mean balance of the entire data set. About how many of the auditors had the true mean for the entire set in their personal confidence interval?
The manager of the dairy section of a large supermarket took a random sample of 250...
The manager of the dairy section of a large supermarket took a random sample of 250 egg cartons and found that 40 cartons had at least one broken egg. (a) Let p be the proportion of egg cartons with at least one broken egg out of the population of all egg cartons stocked by this store. Find a point estimate for p. (b) Find a 90% confidence interval for p. How many egg cartons would the manager need to examine...
2. The manager of the dairy section of a large supermarket took a random sample of...
2. The manager of the dairy section of a large supermarket took a random sample of 250 egg cartons and found that 40 cartons had at least one broken egg. a) Find a 95% confidence interval for p, the proportion of egg cartons that have at least one broken egg. b) Express your confidence interval in words. c) What is the margin of error? d) What sample size would be needed for a margin of error of 3%?
When birth weights were recorded for a simple random sample of 16 male babies born to...
When birth weights were recorded for a simple random sample of 16 male babies born to mothers taking a special vitamin supplement, the sample had a mean of 3.675 kilograms and a standard deviation of 0.657 kilogram. The birth weights for all babies are assumed to normally distributed. Use a 0.05 significance level to test the claim that the mean birth weight for all male babies of mothers taking the vitamin supplement is different from 3.39 kilograms, which is the...
The manager of a large supermarket took a random sample of 1400 egg cartons and found...
The manager of a large supermarket took a random sample of 1400 egg cartons and found that 112 cartons had at least one broken egg. a. Find a point estimate for the proportion of all egg cartons that have at least one broken egg. Ans 10a______________ b. Estimate this proportion using 92% C.I.
A random sample of 16 registered nurses in a large hospital showed that they worked on...
A random sample of 16 registered nurses in a large hospital showed that they worked on average 44.7hours per week. The standard deviation of the sample was 2.2. Estimate the mean of the population with 90%confidence.Assume the variable is normally distributed. Round intermediate answers to at least three decimal places. Round your final answers to one decimal place.
.A simple random sample of 18 recent birth records at the local hospital was taken. In...
.A simple random sample of 18 recent birth records at the local hospital was taken. In the sample, the average birth weight was 3390 grams with a standard deviation of 179.8 grams. Assume that in the population of all babies born in this hospital, the birth weights follow a Normal distribution. (a) Find the 99% confidence interval for the mean birth weight of all babies born in this hospital. (b) How could we reduce the margin of error while keeping...
A simple random sample of 28 recent birth records at the local hospital was taken. In...
A simple random sample of 28 recent birth records at the local hospital was taken. In the sample, the average birth weight was 119.6 ounces and the sample standard deviation was 6.5 ounces. Assume that in the population of all babies born in this hospital, the birth weights follow a Normal distribution, with mean µ. Construct a 98% confidence interval for µ, the average birthweight of newborns. (Show work please)
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT