The health of the bear population in Yellowstone National Part is monitored by periodic measurements taken from anesthetized bears. A sample 54 bears has a mean weight of 182.9 lb. and o is know as 121.8 lb., find a 99% confidence estimate of the population of all bear weights.

Q: How big of a sample needs to be taken in order to estimate the proportion of children in a community…

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Q: Out of a sample of 600 adults aged 18 to 30, 162 still lived with their parents. Based on this,…

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Q: A survey of 100 retailers revealed that the mean after-tax profit was $80,000. Assuming that the…

A: Given data,n=100σ=15,000x=80,000z-value at 95% confidence is Zc=1.96

Q: According to a study conducted on 64 people in Turkey, people watch TV for 8 minutes a day on…

A: Given data: Average = 8 Standard deviation  = 4 Sample size = 64 To find: 95% confidence interval

Q: A laboratory tested 85 chicken eggs and found that the mean amount of cholesterol was 224 milligrams…

A: Given : n=85 , X-bar=224  , σ=16.6  , α=0.05 Since , the population standard deviation (σ) is known.…

Q: Find the critical value z α 2corresponding to a 86% confidence level.

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Q: A sample of 22 public high school students spent an average of 6.5 hours studying per week. Assume…

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Q: According to the National Health Statistics Report, a sample of 360 one year old baby boys in the US…

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Q: 1000 people were surveyed and 380 thought that climate change was not caused by human pollution.…

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Q: An engineer is determining if the bolts she designed are being manufactured with accurate…

A: The sample mean is 42 mm and the standard deviation is 2 mm.

Q: In a survey of 300 T.V. viewers, 120 said they watch network nightly news programs. Construct a 95%…

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Q: A laboratory tested 25 chicken eggs and found that the mean amount of cholesterol was 225 milligrams…

A: Confidence interval when population standard deviation is not known:The formula of confidence…

Q: The mean for the verbal component of the SAT is reported as 500, with a standard deviation of 100. A…

A: It is given that the sample mean is 498 and the population standard deviation is 100.

Q: A group of automotive engineers decided to conduct a study of its school buses and found that for 32…

A: (a) Obtain the margin of error at the 99% confidence interval for the mean. The margin of error at…

Q: The average of serum cholesterol levels in a group of 20 Lebanese was 210 mg/dl and the Standard…

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Q: When Mendel conducted his famous genetics experiments with peas, one sample of offspring consisted…

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Q: A drug company is working on a drug manufacturing process and estimates the daily approximate drug…

A: given that,sample mean, x =892standard deviation, s =27sample size, n =81

Q: A laboratory tested 78 chicken eggs and found that the mean amount of cholesterol was 224 milligrams…

A:

Q: A poll conducted randomly in 2014 found that 52% of U.S. adult Twitter users get at least some news…

A: Proportion is 0.52. The standard error 0.024 The absolute value of Zα/2 is 2.5758 using the Excel…

Q: A dietician selected a random sample of n = 50 male adults and found that their average daily intake…

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Q: A sample of 15 National Collegiate Athletics Association (NCAA) basketball players had an average…

A: we have give that : The sample mean is \bar X = 6Xˉ=6 and the sample standard deviation is s =…

Q: At a factory, batteries are produced with a standard deviation of 3.2 months. In a sample of 81…

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Q: a) A sample of 10 measurements of the radius of a marble gave a mean of 4.38mm and a standard…

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Q: 9. A survey found that out of 900 workers, 150 said they were interrupted by frank phone calls. Find…

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Q: A random sample of 1000 google play apps was collected and the average rating was calculated to be…

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Q: A sample of 22 public high school students spent an average of 6.5 hours studying per week. Assuming…

A: Given: Sample Sizen=22Sample MeanX=6.5Standard Deviationσ=2.3 The z value corresponding to…

Q: A meteorologist who sampled 13 randomly selected thunderstorms found that the average speed at which…

A: We have given that,  Sample mean (x̄) = 15.0 , standard deviation (s)= 1.7 and sample size (n) = 13…

Q: From a recent survey, the 90% confidence interval estimate of the proportion of students who have…

A: Note: As per the guidelines only one question can be answered. Kindly,  resubmit the question with…

Q: In a recent survey of 500 teenagers, 18.6% indicated that they had eaten junk food while watching TV…

A: Given Data: p^=0.186n=500

Q: Find the error margin for a 98% confidence interval for the average value of Y when X is 9.

A: Given: The error margin for 98% confidence internal for the average value of Y when X is 9

Q: A study of 96 bolts of carpet showed that their average length was 77.5 yards. The standard…

A: GivenMean(x)=77.5sample size(n)=96standard deviation(s)=1.6α=1-0.99=0.01α2=0.005zα2=z0.05=2.58

Q: Find a 98% confidence interval for the true mean length of eyelashes, if a sample 33 eyelashes has a…

A: Let we define µ be the true mean length of eyelashes. A sample 33 eyelashes has a mean length of…

Q: A marine biologist is interested in whether the Chinook salmon, a particular species of salmon in…

A: Confidence Interval: Confidence interval is the interval estimate of the population parameter. It is…

Q: A sample of 50 patients undergoing chemotherapy has a mean weight loss of 24 kg after they went the…

A: For the given data Find 99% confidence interval = ?

Q: A random sample of 328 medical doctors showed that 171 had a solo practice. Let p represent the…

A: Given, The best point estimate for p is,

Q: A sample data set, n = 115, shows human body temperatures with a mean of 99.6ºF. If the standard…

A: Given Data: n=115x¯=99.6σ=0.75   z-value corresponding to 99% Confidence Interval=2.576

Q: The average hemoglobin reading for a sample of 20 LHS teachers was 16 g/100 ml, with a sample…

A: We need to find the 95% confidence interval for the given sample data.

Q: A sample of 50 patients undergoing chemotherapy has a mean weight loss of 24 kg after they went the…

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Q: In survey of 7000 women, 4431 says they change their nail polish once a week. Construct a 95%…

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Q: A random sample of 10 bath soaps were tested for their average pH level. Find the 99% confidence…

A: The confidence interval method is used in hypothesis testing.

Q: and s=3, find the margin of error at a 95% confidence level two decimal places.

A: Solution

Q: A recent study of 25 motorists showed that they spent an average of P750 per week. The standard…

A: Given : s

Q: A physical exercise has a mean length of 20 minutes with a standard deviation of 5 minutes. A gym…

A: Obtain the sample size needed. The sample size needed is obtained below as follows : Procedure for…

Q: When Mendel conducted his famous genetics experiments with peas, one sample of offspring consisted…

A: a. The sample proportion of yellow peas is, Thus, the sample proportion of yellow peas is 0.262.

Q: The determination of copper in a seawater sample gave a mean value of 77.81 mg/L and a ndard…

A: Critical value: The confidence level is 100*(1–α)% = 95%. The critical value is obtained as 1.96…

Q: Wildlife biologists inspect 180 deer taken by hunters and find 36 of them carrying Lyme disease…

A: Since, you have asked multiple question, we will solve the first question for you. If you want any…

Q: A random sample of 75 college students of MSU is selected and 16 are found to have motorcycles on…

A: As per our guidelines we are suppose to answer only one question Givensample size(n)=75no.of…

Q: a laboratory tested 36 chicken eggs and found that the mean amount of the cholesterol was 230 mg…

A: