A random sample of 35 customers has an average order size of $80, and a population standard deviation of $22.00. Not all samples of this size would give you the same sample average, so you'd like to construct an "interval estimate" to convey this uncertainty. What is a 90% confidence interval for this mean? a $78.97 - $81.03 b $43.81 - $116.19 c $73.88 - $86.12 d $72.56 - $87.44

Q: A random sample of  46  four-year-olds attending day care centers provided a yearly tuition average…

A: Solution

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

A:

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

A:

Q: A random sample of 54 four-year-olds attending day care centers provided a yearly tuition average of…

A:

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

A: The following information is available in the question n=35x¯=110,000σ=17.30 (i) We know, the level…

Q: For a sample of 120 businesses, the average profit they generate in a month is $54,000 with a…

A: We have given that,  Average or sample mean (x̄) = 54000, standard deviation (s) = 8800 and sample…

Q: ool graduates, and ask them their annual incomes. They give you an average income of $35,000 per…

A: As the population standard deviation is known, we will use z distribution. The value of z at 95%…

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

A:

Q: In a survey, 13 people were asked how much they spent on their child's last birthday gift. The…

A: We have to construct ci.

Q: Mocha Joe has n = 23, a sample average of 1,000,000, and a sample standard deviation of 350,000.…

A:

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

A: Mean()=108.78standard deviation()=10.26sample size(n)=36

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

A:

Q: Almost all employees working for financial companies in New York City receive large bonuses at the…

A:

Q: A survey of 26 individuals found that they spent an average of $39.21 on exercise attire for the…

A: Confidence interval is an inference process which is used to estimate the population parameter. The…

Q: You own an icecream shop in Bay City, and you are interested in estimating how many icecreams sold.…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

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

A: To construct the confidence intervals, we use the following formulas:   For a 90% confidence…

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

A: The question is about confidence interval Given : Random selected no. of business days ( n ) = 47…

Q: Calculate the mean and standard deviation for the two sets of data. Calculate the 95% confidence…

A: Mean and standard deviation for dataset A: Mean x¯=∑i=1nXin=70.24+70.22+70.103=210.563=70.1867…

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

A:

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

A:

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: What management interpretation would you give for a 95% confidence interval calculated for the mean?…

A: The confidence interval is the measure with with we try to get the interval on the population…

Q: convenient, use technology to construct the confidence intervals. A random sample of 50 home theater…

A: For the calculation, Minitab is used,  We are given a random sample of size 50 with sample mean 126…

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

A: (a)given that,population standard deviation, σ =17.7sample mean, x =122size (n)=45standard error =…

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

A:

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

A:

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

A: Given data is sample size(n)=35Mean(x)=149.00standard deviation(σ)=16.80

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

A: Given data: Sample  mean = $145 Sample size (n) = 40 Population standard deviation  = $15.50

Q: A random sample of 40 customers has an average order size of $78.25, and a population standard…

A: given that standard deviation=$22.50 mean=$78.25 n=40

Q: Almost all employees working for financial companies in New York City receive large bonuses at the…

A: Here we have,   sample size : n = 63sample average bonus: x¯ = $50,000sample standard deviation : s=…

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

A: GivenMean(x)=137.00standard deviation(σ)=18.50sample size(n)=45

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

A:

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

A:

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

A: From the given information, let X be the price of a certain stock. Total number of business days n =…

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

A: For the 48 sampled business days (i.e., the sample size, n=48), the sample mean closing price (in $)…

Q: A school district wants to know how many students in the district have peanut allergies. Use a 90%…

A: Standard deviation=σ=9 Margin of error=E=0.8

Q: A market surveyor wishes to know how many energy drinks teenagers drink each week. They want to…

A: Population standard deviation()=1.3Margin of error(E)=0.06

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

A: We have given that  Sample size n= 55 Sample mean = 117.00 Population  Standard deviation = 17.40

Q: A study reports that recent college graduates from Connecticut face the highest average debt of…

A: x¯=31281,σ=5200,n=40Formula for confidence interval=(x¯±zc×σn)

Q: You take a sample of 40 high-school graduates, and ask them their annual incomes. They give you an…

A: Given that, Mean = 35000 Standard deviation = 10000 Sample size, n = 40 90% confidence level

Q: The Statistics Games are played by a large number of teams across the county. Teams raise money to…

A: Sample mean (x̄) =  $ 375 , standard deviation    (s) = $ 32 and sample size (n) = 36 Then,

Q: What percentage of hospitals provide at least some charity care? Based on a random sample of 10…

A: Solution: a. Let X be the percentage of hospitals provide at least some charity care. From the given…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.