A sample of 67 adults attending a country fair determined that the mean age was 51. Given that the population standard deviation is known to be 40, determine the 98 confidence interval for the population mean age. (Round the final answers to 3 decimal places.) Confidence interval for the population mean is [ and [

Q: You measure 47 watermelons' weights, and find they have a mean weight of 80 ounces. Assume the…

A:

Q: a. Find the 90% confidence interval for μ. b. Find the 95% confidence interval for μ. c. What…

A: Given, x=16.7σ2=16n = 60

Q: You measure 36 turtles' weights, and find they have a mean weight of 59 ounces. Assume the…

A:

Q: If we want to provide a 95% confidence interval for the mean of a population when the population…

A:

Q: You measure 50 dogs' weights, and find they have a mean weight of 30 ounces. Assume the population…

A:

Q: a 95% confidence interval estimate for population mean is determined to be 75.38 to 86.52. if the…

A: We have  to find the confidence level is reduced to 90%, the confidence interval will....

Q: If a 90% confidence interval for the mean is (75.3 to 80.9), we would reject H0 : = 70 in favor of…

A:

Q: The mean and the standard deviation of a normal population are 11,795 and 14054 respectively. If n=…

A:

Q: Find the sample size required to estimate the mean IQ of all  college students. Assume we want a 99…

A: From the given information, σ=15 and E=2.

Q: Find the 95% confidence interval for the standard deviation of the ages of residents in a senior…

A:

Q: 5. A random sample of 43 foreign language movies made since the year 2000 had a mean length of 112.5…

A: Here, the parent distribution from which the sample is taken is unknown and also, the population…

Q: A sample of the reading scores of 30 fifth graders has mean of 62.the standard deviation of the…

A: Given,   Sample size = 30 Sample mean = 62 Population standard deviation = 15   The objective is to…

Q: Find the 95% confidence interval for the standard deviation of the ages of residents in a senior…

A:

Q: The population distribution is normally distributed and has a mean of 13.6 and a standard deviation…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

Q: -cientists tested each in a sample of 4 alleles of antigen-produced protein for level of peptide.…

A: The given value of n is 4, the sample mean is 1.49 and the sample standard deviation is 0.15.

Q: sample of 16 students was taken from university. These students spent an average of $170 on books…

A:

Q: u are given the sample mean and the population standard deviation. Use this information to construct…

A: Here given sample mean  = $112.50sample size  = n = 37population standard deviation  =  $9.71

Q: Construct the confidence interval for the population mean u. c=0.95 x=15.6 and standard deviation =…

A:

Q: A survey was conducted that asked 1007 people how many books they had read in the past year. Results…

A: given that,sample mean, x =12.2standard deviation, s =16.6sample size, n =1007standard error = sd/…

Q: You measure 31 textbooks' weights, and find they have a mean weight of 66 ounces. Assume the…

A: Given: n=31x¯=66 ouncesσ=6.9 ounces

Q: A researcher examines 88 sedimentary samples for nitrate concentration. The mean nitrate…

A: Solution:Given thatNumber of samples (n) = 88Sample mean = 0.688Standard deviation = 0.0701

Q: A sample of 50 students was taken from the local university. These students spent an average of R170…

A: Given information- Sample size (n) = 50 Mean x̅ = R170 Standard deviation (s) = R25.50 Significance…

Q: A 95% confidence interval forp is given as (0.34,0.66). How large was the sample used to construct…

A: Formula for the sample size needed to estimate a population proportion is

Q: A human resource manager wants to see if there is a difference in the proportion of minority…

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

Q: We would like to determine the mean value for a population. Given that the a sample of size 100 has…

A: The range where the population parameter is likely to occur is calculated using the confidence…

Q: You measure 28 turtle's weights, and find, they have a mean weight of 51 ounces. Assume the…

A:

Q: Free of CVD       Prevalent CVD    Total Men          1548                 244                 1792…

A: Given The tota number of men with CVD =244The tota number of women with CVD =135The tota number of…

Q: Which of the following is the best estimate of the range of a population value given the sample…

A: Confidence interval is known as the probability that a population parameter will lie between a set…

Q: A researcher is interested in finding a 90% confidence interval for the mean number of times per day…

A: Given data A researcher is interested in finding a 90% confidence interval for the mean number of…

Q: In a survey, 25 people were asked how much they spent on their child's last birthday gift. The…

A: Givensample size(n)=25Mean(x)=36standard deviation(s)=3confidence level = 99%

Q: You measure 50 turtles' weights, and find they have a mean weight of 76 ounces. Assume the…

A:

Q: In a survey of 2092 adults in a recent year, 748 made a New Year's resolution to eat healthier.…

A: Given data n=2092 x=748

Q: A 90%  confidence interval for a population mean was reported to be 154  to 160. If standard…

A: Let n be the sample size. Given σ=17 The z-score for 90% confidence is  zα2=1.645

Q: A random sample of high school students

A: Here it is given that, A 99% confidence interval based on this sample is 1.7 hours to 3.1 hours

Q: You measure 49 dogs' weights, and find they have a mean weight of 72 ounces. Assume the population…

A:

Q: A 90% confidence interval for the proportion of Americans with cancer was found to be (0.185,…

A:

Q: You measure 43 dogs' weights, and find they have a mean weight of 34 ounces. Assume the population…

A: The objective of this question is to construct a 95% confidence interval for the true population…

Q: You measure 39 turtles' weights, and find they have a mean weight of 48 ounces. Assume the…

A:

Q: You are given the sample mean and the population standard deviation. Use this information to…

A: The 90% confidence interval is (62.27, 129.73).Explanation:(1−α)100% confidence interval for μ will…

Q: You measure 50 textbooks' weights, and find they have a mean weight of 58 ounces. Assume the…

A: Given ,         sample size n=50         sample mean x=58population standard deviation σ=14.7and…

Q: In a study of statistics professors' salaries (USA) the following data was obtained: n = 23, ã =…

A: Note: Please repost 2nd question as i can author only 1 question as per my policy. Given:…

Q: A sample of 30 days of sales were taken. The mean of those 30 days of sales were $10,000 with a…

A: Given values, sample size (n) = 30 Mean = 10,000 Standard deviation = 2000 z value for 95%…

Q: À 90% confidence interval for p is given as (0.26,0.54). H

A: Given, a 90% confidence interval for p is given as (0.26, 0.54).