From a random sample of 25 days in a recent year, gasoline prices had a mean of 51.25 pesos and a standard 5.32 pesos. Construct a 99% confidence interval for the population mean.

Q: When the standard deviation used to construct a confidence interval for a population mean increases,…

A: Given data: When the standard deviation used to construct a confidence interval for a population…

Q: Researchers found that in certain counties in the country, females spend an average of 65 days in…

A: standard deviationσ=4n=36x¯=65

Q: If a 92% Confidence Interval for the Population Mean is (67.8, 78.9), find its Margin of Error.

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Q: I know the answer but I want it to get it done in Excel.

A: 1. first fill the values in cells in excel.  2. then for mean use formula : AVERAGE("CELL RANGE…

Q: A random sample of 21 Camden County College students had a mean age of 24 years, with a standard…

A:

Q: adway Section 40 has an accident rate of 230 accident per 100 million vehicle miles VM). The mean…

A: We have given that  Sample size n = 230 Sample mean = 94 Standard deviation = 70 90 % confidence…

Q: The random sample is 100 students 16 to 22 years old. The mean of hours they sleep is 8.9 hrs and…

A: Given,sample size(n)=100mean(μ)=8.9standard deviation(s)=2.2α=1-0.95=0.05α2=0.025degrees of…

Q: 5. A researcher surveyed of 300 young adults ages 18-29 found that on average, those surveyed sent…

A: 5. Given that, n=300x¯=67.7s=23.6 Confidence level=90% Significance level=1-0.90-0.10…

Q: In a random sample of 23 private school teachers in queens county the average teaching experience is…

A:

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

A:

Q: what would the 95% confidence limits for a sample of 120 with a mean of 51 and a standard deviation…

A: It is given that mean and standard deviation are 51 and 12, respectively.

Q: In a survey, 45 people were asked how much they spent on their last partners birthday gift. The…

A: Given information- Sample size, n = 45 Significance level, α = 0.10 Sample mean, x-bar = $90 Sample…

Q: It is required to construct a (1−?)100% confidence interval for the true population median, M using…

A: A sign test is non-parametric. In case of a sign test, we compare the medians, M, instead of the…

Q: We test a new drug on 18 patients. We get a sample mean improvement of 15 with a standard deviation…

A: Introduction: The nature of the population distribution is not given here. The sample size of 18 is…

Q: en analyses of a chemical in soil gave a mean of 20.92 mg/kg and a standard deviation of 0.45 mg/kg.…

A: n=10x¯=20.92S=0.45CI=0.95α=1-0.95=0.05we have to find out the 95 % CI for the given data

Q: Construct a 95% confidence interval containing the population mean of the height of giraffes if a…

A: We want to find the 95% CI for population mean μ

Q: A data set includes 109 body temperatures of healthy adult humans having a mean of 98.2°F and a…

A: The random variable X follows normal distribution. The sample size is 109. The sample mean is 98.2.…

Q: A food snack manufacturer samples 9 bags of pretzels off the assembly line and weighs their…

A: Given information Sample size (n) = 9 Sample mean x̅ = 15.2 oz Standard deviation (s) = 0.50 oz…

Q: A recent study of 28 city residents showed that the mean of the number of years they lived at their…

A: The formula of confidence interval for the population mean is given by                  confidence…

Q: During the nutrition research, the amount of consumed kilocalories per day was measured for 18…

A:

Q: The lead levels in a random sample of 35 crows in the region were measured and recorded. The mean…

A: It is given that  Sample size n = 35 Sample mean M = 4.50 Sample SD s = 1.12 Confidence level = 99%…

Q: A study analyzed the body fat percentage of 80 ISU students. The sample mean was 23.70 and the…

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Q: random sample of 20 data points has a sample mean of 375 and a sample standard deviation of 81.…

A: Given that  Sample size n =20 Sample mean=375 Sample standard deviation =81

Q: find the 99% confidence interval of the mean number of miles driven per day by all truckers

A: It is given that  Average = 540 Population standard deviation = 40 Sample size = 90

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

A: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

Q: 73 full time workers were surveyed on how many hours they spend watching television during the week.…

A: Given information, n=73x¯=3.2s=0.2 Confidence level is 95% significance level is 5% df=n-1=73-1=72 t…

Q: 95% confidence interval of the population mean

A: Given : Sample Size, n = 40 Sample Mean, x̄ = 500 sample standard…

Q: A food snack manufacturer samples 11 bags of pretzels off the assembly line and weighs their…

A:

Q: A popular weight loss program claims users will lose weight each month. Linda samples 25 dieters and…

A: We have given that,  Sample mean (x̄) = 10 pounds, standard deviation (s) = 2 pounds and sample size…

Q: In a random sample of six mobile​ devices, the mean repair cost was ​$65.00 and the standard…

A:

Q: The lead levels in a random sample of 23 crows in the region were measured and recorded. The mean…

A:

Q: FIND 90% CONFIDENCE INTERVAL FOR THE DIFFERENCE IN POPULATION PROPORTIONS Pf -Pm .

A:

Q: The sample correlation is -0.8. If the sample size was 40, then the 99% confidence interval states…

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Q: company manufactures a certain over-the-counter drug. The company samples 80 pills and finds that…

A: We have given that  Sample size n = 80 Sample mean = 325.5 Standard deviation s=10.3 90%confidence…

Q: Suppose that the owner of a recently opened convenience store in Kuala Lumpur, Malaysia, wants to…

A: Given: n=16x¯=75s=6

Q: A small business wanted to estimate the mean income from their customers. They took a sample of 256…

A: We have to find  the 90% confidence interval estimate for the population mean income of their…