In a survey, 32 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $32 and standard deviation of $11. Construct a confidence interval at a 90% confidence level. Give your answers to one decimal place.        ±±  Interpret your confidence interval in the context of this problem.

Q: You measure 41 textbooks' weights, and find they have a mean weight of 80 ounces. Assume the…

A:

Q: You measure 47 textbooks' weights, and find they have a mean weight of 62 ounces. Assume the…

A: Given Mean =62 Standard deviation=13.2 n=47

Q: In a test of the effectiveness of garlic for lowering cholesterol, 50 subjects were treated with…

A: Given,sample size(n)=50sample mean(x¯)=3.1standard deviation(S)=16.9degrees of freedom…

Q: In a survey,  20 people were asked how much they spent on their child's last birthday gift.  The…

A: Solution: Given information: n= 20 Sample size  x= $38 Sample mean s= $7 Sample standard deviation

Q: You measure 49 backpacks' weights, and find they have a mean weight of 63 ounces. Assume the…

A: Given,sample size(n)=49sample mean(x¯)=63population standard deviation…

Q: maximal margin of error associated with a 95% confidence interval for the true population mean…

A: here given population standard deviation  = 13.8 sample size n =36 z critical for 95 % confidence…

Q: You measure 29 turtles' weights, and find they have a mean weight of 44 ounces. Assume the…

A:

Q: You measure 47 randomly selected textbooks' weights, and find they have a mean weight of 49 ounces.…

A: Given that  Sample Mean \bar XXˉ = 4949 Population Standard Deviation (\sigma)(σ) = 14.814.8…

Q: magine that you want to estimate the average home value in your neighborhood.   The standard…

A: standard deviation  σ = $100,000.the maximum margin of error E=$45,000.

Q: In a survey, 27 people were asked how much they spent on their child's last birthday gift. The…

A: Given In a survey, 27 people were asked how much they spent on their child's last birthday gift. The…

Q: For a random sample of 55 overweight men, the mean of the number of pounds that they were overweight…

A: Given,sample size(n)=55sample mean(x)=32standard deviation(σ)=4.1α=1-0.90=0.1α2=0.05z0.05 =1.645

Q: In a survey, 18 people were asked how much they spent on their child's last birthday gift. The…

A: Given data in a survey 18 people were asked how much they spent on their child's last birthday gift.…

Q: You measure 35 backpacks' weights, and find they have a mean weight of 40 ounces. Assume the…

A: Sample size (n) = 35 Sample mean(x̅) = 40 Population standard deviation(σ) = 7.8 Confidence interval…

Q: You measure 43 backpacks' weights, and find they have a mean weight of 72 ounces. Assume the…

A: We have given that, Sample mean (x̄) = 72, population standard deviation (σ) = 11.7 and sample size…

Q: You measure 30 watermelons' weights, and find they have a mean weight of 34 ounces. Assume the…

A: Sample mean = x̅ = 34 Sample size = n = 30 Population S.D = σ = 11.3

Q: You measure 38 dogs' weights, and find they have a mean weight of 62 ounces. Assume the population…

A: Given mean weight of 62 ounces. standard deviation is 10.8 ounces. construct a 99% confidence level

Q: In a survey, 27 people were asked how much they spent on their child's last birthday gift. The…

A: The sample size is 27, sample mean is 50, and sample standard deviation is 13. The degrees of…

Q: In a survey, 10 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: gills, and find they have a mean weight of 31 ounces. Assume the standard deviation is 9.1 ounces.…

A: Given Sample size=34 Sample mean=31 Population standard deviation =9.1

Q: A survey of 50 young professionals found that they spent an average of $20 confidence interval. The…

A: Sample mean = x̅ = 20.09 Sample size = n = 50 Sample S.D = s = 11.12 Standard Error = s/√n  =…

Q: You measure 41 backpacks' weights, and find they have a mean weight of 50 ounces. Assume the…

A: Since we know population standard deviation, Use z-distribution to find z-critical value. Find…

Q: In a survey, 18 people were asked how much they spent on their child's last birthday gift. The…

A: From the provided information, Sample size (n) = 18 Sample mean (x̄) = 35.40 Standard deviation (s)…

Q: You measure 28 backpacks' weights, and find they have a mean weight of 52 ounces. Assume the…

A:

Q: Construct a confidence interval at a 80% confidence level. Give your answers to one decimal place.…

A: In a survey, 27 people were asked how much they spent on their child's last birthday gift. The…

Q: You measure 44 textbooks' weights, and find they have a mean weight of 69 ounces. Assume the…

A: The 90% confidence interval for true population mean textbook weight is obtained below: From the…

Q: You measure 50 textbooks' weights, and find they have a mean weight of 43 ounces. Assume the…

A:

Q: In a survey, 27 people were asked how much they spent on their child's last birthday gift. The…

A: From the provided information, Sample size (n) = 27 Sample mean (x̅) = $31.5 Sample standard…

Q: You measure 48 backpacks' weights, and find they have a mean weight of 71 ounces. Assume the…

A:

Q: Suppose that a political campaign by Loki estimates that the candidate’s polling percentage y and…

A: The candidate’s polling percentage is denoted by 'y'.The amount is denoted by x (in hundred…

Q: You measure 46 backpacks' weights, and find they have a mean weight of 36 ounces. Assume the…

A:

Q: In a survey, 12 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: You measure 33 dogs' weights, and find they have a mean weight of 55 ounces. Assume the population…

A: It is given that Sample size n = 33 Sample mean M = 55 Population SD = 14 The critical value of Z at…

Q: You measure 31 backpacks' weights, and find they have a mean weight of 77 ounces. Assume the…

A: Since we know population standard deviation, Use z-distribution to find z-critical value. Find…

Q: Marketing companies have collected data implying that teenage girls use more ringtones on their…

A: Given n1=n2=20 S1=1.5 S2=0.8

Q: In a survey, 23 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: a sample of 25 automobiles shows that the mean price was $20,500 with standard deviation of $2,500.…

A: Givensample size = n = 25Mean price = $20,500Standard deviation = $2500 The distribution is normal.…

Q: You measure 40 turtles' weights, and find they have a mean weight of 71 ounces. Assume the…

A: Givensample size(n)=40Mean(x)=71standard deviation(σ)=5.1confidence level=99%

Q: One​ year, the mean age of an inmate on death row was 39.1 years. A sociologist wondered whether the…

A: Population mean, μ=39.1 Sample size, n=32 Sample mean, x¯=37.7 Sample standard deviation, s=9.2…

Q: You measure 40 watermelons' weights, and find they have a mean weight of 75 ounces. Assume the…

A:

Q: You measure 35 backpacks' weights, and find they have a mean weight of 64 ounces. Assume the…

A: n = 35x¯ = 64σ = 499% ci for μ = ?

Q: A sample of 263 students who were taking online courses were asked to describe their overall…

A: