Question 7 c) Find the 95% confidence interval estimate of the proportion of adults nationwide who think marijuana should be legalized
This is off the worksheet " A company that produce bread is concerned about the distribution of the amount of sodium in its bread the Company takes a small simple of random sample of 100 slice of bread and computes the sample mean to be 103 milligrams of sodium per slice. Assume that though population standard deviation is 10 milligrams"
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Question 7 c) Find the 95% confidence interval estimate of the proportion of adults nationwide who think marijuana should be legalized
all answers please!! 1. A company that produces brendis concerned about the distribution of the amount of sodiu...
all answers please!!
1. A company that produces brendis concerned about the distribution of the amount of sodium in its bread. The company takes a simple random sample of 100 slices of bread and compute the sample mean to be 103 milligrams of sodium per slice. Assume that the population standard deviation is 10 milligrams a) Construct a 95% confidence interval estimate for the mean sedium level. b) Construct a 99% confidence intervalestime for the mean sodium level. 2. Fill...
A 95% confidence interval for a population proportion p is found to be (0.52, 0.58). What...
A 95% confidence interval for a population proportion p is found to be (0.52, 0.58). What does this mean? A. There is a 95% probability that the actual value of p is between 52% and 58%. B. If many simple random samples of the same size were taken from the population, and a confidence interval were constructed for each one, then about 95% of them would contain the actual value of p. C. 95% of all sample proportions are between...
8.1.5 Question Help Determine the 95% confidence interval estimate for the population mean of a normal...
8.1.5 Question Help Determine the 95% confidence interval estimate for the population mean of a normal distribution given n = 100, o = 133, and x = 1,500 The 95% confidence interval for the population mean is from to (Round to two decimal places as needed. Use ascending order.) 8.1.14-T Question Help As a follow-up to a report on gas consumption, a consumer group conducted a study of SUV owners to estimate the mean mileage for their vehicles. A simple...
QUESTION 21 If we change a 90% confidence interval estimate to a 99% confidence interval estimate...
QUESTION 21 If we change a 90% confidence interval estimate to a 99% confidence interval estimate while holding sample size constant, we can expect a. the width of the confidence interval to increase. b. the width of the confidence interval to decrease. c. the width of the confidence interval to remain the same. d. the sample size to increase. QUESTION 22 Which one of the following is a correct statement about the probability distribution of a t random variable? a....
Confidence Interval Problem Question 3 The inspection division of the LCC company wants to estimate the...
Confidence Interval Problem Question 3 The inspection division of the LCC company wants to estimate the actual amount of soft drink in 2-liter bottles at the local bottling plant of a large nationally known soft-drink company. The bottling plant has informed the inspection division that the population standard deviation for 2-liter bottles is 0.05 liter. A random sample of 80 2-liter bottles at this bottling plant indicates a sample mean of 1.985 liter a) Construct a 99% confidence interval estimate...
Annie is a researcher who wants to find a confidence interval estimate of the mean time...
Annie is a researcher who wants to find a confidence interval estimate of the mean time it takes to complete an order over the phone at a call center for a large retail company. She has selected a random sample of 18 orders and recorded the time to complete the order. The sample mean time was 4.27 minutes and the sample standard deviation was 0.78 minutes. Assuming the conditions needed for inference are met,which of the following is the appropriate...
a. Find a 95% confidence interval for μ. b. What do you mean when you say...
a. Find a 95% confidence interval for μ.
b. What do you mean when you say that a confidence coefficient
is .90?
c. Find a 99% confidence interval for μ.
d. What happens to the width of a confidence interval as the
value of the confidence coefficient is increased while the sample
size is held fixed?
e. Would your confidence intervals of parts a and c be valid if
the distribution of the original population were not normal?
Explain.
A...
For confidence interval computations, if the sample size is increased, we expect the margin of error...
For confidence interval computations, if the sample size is increased, we expect the margin of error to: a. Increase b. Decrease c. stay the same The company you work for produces automotive parts for GM. A certain machine that makes a cutout in a piece of steel averages a cut size of 203.2085 mm with a standard deviation of 0.2083 mm. A random sample of 66 is taken from the population. What is the distribution of the sample mean? Approximately...
Find the indicated critical z value. the value of zan that corresponds to a confidence level...
Find the indicated critical z value. the value of zan that corresponds to a confidence level of 97 80% Use the given degree of confidence 2) Of 88 selected and sample data to construct a confidence interval for the population proportion p adults selected randomly from one town 69 have health insurance. Find a 90% confidence interval for the true proportion of all adults in the town who have health insurance the given degree of confidence and sample data to...
Question 16 (5 points) Saved Opinion polls find that 20% of Americans adults claim that they...
Question 16 (5 points) Saved Opinion polls find that 20% of Americans adults claim that they don't get enough sleep. Suppose you take a random sample of 20 American adults and count the number of individuals in your sample who claim that they never have time to relax. Based on this information, match the following probabilities. 1. What is the probability that at least 8 out of 20 American adults don't get enough sleep? 0.968 0.055 2. What is the...
all answers please!!
1. A company that produces brendis concerned about the distribution of the amount of sodium in its bread. The company takes a simple random sample of 100 slices of bread and compute the sample mean to be 103 milligrams of sodium per slice. Assume that the population standard deviation is 10 milligrams a) Construct a 95% confidence interval estimate for the mean sedium level. b) Construct a 99% confidence intervalestime for the mean sodium level. 2. Fill...
8.1.5 Question Help Determine the 95% confidence interval estimate for the population mean of a normal distribution given n = 100, o = 133, and x = 1,500 The 95% confidence interval for the population mean is from to (Round to two decimal places as needed. Use ascending order.) 8.1.14-T Question Help As a follow-up to a report on gas consumption, a consumer group conducted a study of SUV owners to estimate the mean mileage for their vehicles. A simple...
Annie is a researcher who wants to find a confidence interval estimate of the mean time it takes to complete an order over the phone at a call center for a large retail company. She has selected a random sample of 18 orders and recorded the time to complete the order. The sample mean time was 4.27 minutes and the sample standard deviation was 0.78 minutes. Assuming the conditions needed for inference are met,which of the following is the appropriate...
a. Find a 95% confidence interval for μ.
b. What do you mean when you say that a confidence coefficient
is .90?
c. Find a 99% confidence interval for μ.
d. What happens to the width of a confidence interval as the
value of the confidence coefficient is increased while the sample
size is held fixed?
e. Would your confidence intervals of parts a and c be valid if
the distribution of the original population were not normal?
Explain.
A...
Find the indicated critical z value. the value of zan that corresponds to a confidence level of 97 80% Use the given degree of confidence 2) Of 88 selected and sample data to construct a confidence interval for the population proportion p adults selected randomly from one town 69 have health insurance. Find a 90% confidence interval for the true proportion of all adults in the town who have health insurance the given degree of confidence and sample data to...
Question 16 (5 points) Saved Opinion polls find that 20% of Americans adults claim that they don't get enough sleep. Suppose you take a random sample of 20 American adults and count the number of individuals in your sample who claim that they never have time to relax. Based on this information, match the following probabilities. 1. What is the probability that at least 8 out of 20 American adults don't get enough sleep? 0.968 0.055 2. What is the...
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