1) What is the standard error of the sample mean? 1.5207 1.5828 5.4831 8.3383 Submit Answer Tries 0/2 2) Calculate a 90% confidence interval for the population mean. O [13.2453,17.3701] O [13.6661,16.9492] O [12.5974,18.0180] O [7.9046,22.7108] Submit Answer Tries 0/2

Q: A company that produces bread is concerned about the distribution of the amount of sodium in its…

A: Given: n=100X¯=103 mg/sliceσ=10 mg/slice

Q: The minimum sample size needed to construct a 95% confidence interval for µ, with error not…

A: GivenMargin of error(E)=1.5variance(σ2)=225standard deviation(σ)=225=15confidence level=95%

Q: Using the sample paired data below, construct a 95% confidence interval for the population mean of…

A: The difference is, x y Difference(x-y) 5.1 4.7 0.4 5.0 3.9 1.1 4.6 4.1 0.5 3.5 4.2 -0.7…

Q: Construct the indicated confidence interval for the difference between population proportions p1 -…

A:

Q: A random sample of 11 adults is obtained, and each person’s red blood cell count (in cells per…

A: we know that  n=11 mean (xbar) =∑xn variance =S^2=  ∑(x- xbar)^2n-1 degree of freedom =n-1

Q: Find the sample size necessary for an 80% confidence level with a maximal margin of error E = 0.10…

A: We have given that the average x-bar 3.15, population standard deviation 0.24 and margin of error is…

Q: Assume that all​ grade-point averages are to be standardized on a scale between 0 and 6. How many​…

A:

Q: Construct the indicated confidence interval for the difference between the two population means.…

A: First, we need to calculate the mean and sd for the two samples by using the following table of…

Q: A sample of 20 items provides a sample standard deviation of 5. a. Compute the 90% confidence…

A: We have given that  Sample size n=20 , sample standard deviation s= 5  Degree of freedom = n -1

Q: 2. A researcher wants to test if the mean GPAS (grade point averages) of all male and all female…

A: Comment: As per the our company guidelines we are supposed to answer only one question. Kindly…

Q: Listed below are speeds​ (mi/h) measured from traffic on a busy highway. This simple random sample…

A: The provided information is:

Q: Construct a confidence interval for a simple random sample of front seat occupants involved in car…

A: Confidence intervals are not only used for representing a credible region for a parameter, they can…

Q: In a random sample of seven people, the mean driving distance to work was 20.2 miles and the…

A: Given information Sample size (n) = 7 Mean x̅ = 20.2 miles Standard deviation (s) = 6.8 miles…

Q: Find the sample size required to make a 95% confidence interval estimate of the mean length of the…

A: GivenMargin of error(E)=0.6standard deviation(σ)=3confidence interval=95%

Q: Two samples are taken with the following sample means, sizes, and standard deviations T1 = 24 T2 =…

A:

Q: Sh P-h Nh nh 1 138 30 0.50 200 20 2 103 25 0.78 250 30 3 210 50 0.21 100 25 c. Develop an…

A: stratum Xbar  Sh Ph Nh nh 1 138 30 0.5 200 20 2 103 25 0.78 250 30 3 210 50 0.21 100 25…

Q: The minimum sample size needed to construct a 95% confidence interval for u, with error not…

A:

Q: What value of tn-1 would be used to construct a 99% confidence interval for the mean with a sample…

A: Givenconfidence level(c)=99%sample size(n)=17

Q: As a part of the recruitment of new business in their city, the economic development department of…

A: a) The 99% confidence interval for the mean gross profit margin is, Thus, the 99% confidence…

Q: Calculate the 95% confidence interval for the difference (mu1-mu2) of two population means given the…

A: Given : Population 1 :   n= 6,mean=17.62,s.d=3.25 Population 2 :  n=17,mean=15.57,s.d=2.47

Q: etermine the sample size necessary to construct a 85% confidence interval with an error of 1.24 if…

A: Solution: Given information: Margin of error = E = 1.24 Population standard deviation = σ=4.03…

Q: (3) For n = 46, sample mean = 77.7 and a known population standard () = 20, construct a 78%…

A: Given that sample mean x¯  =77.7n=46a known population standard deviation σ = 20 A 78% confidence…

Q: 3. A certain change in a process for manufacture of component parts is being considered. Samples are…

A: It is asked to answer only 3a and 3c. So, we will solve only that parts.   3. Existing procedure:…

Q: (b) Estimate the sample size needed if no estimate of p is available. A sample of 504 adults is…

A: Given that m.e=0.03,alpha=0.002 ( 2 ) n=?

Q: Consider the following sample information randomly selected from two populations. Sample 1: n1 =250,…

A:

Q: Consider the following results for independent samples taken from two populations. Sample 1 Sample 2…

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Q: The International Air Transport Association surveys business travelers to develop quality ratings…

A: Givensample size(n)=50Mean(x)=3.34standard deviation(s)=2.163confidence interval = 95%

Q: A sample of size 78 produced the sample mean of 16.4. Assuming the population standard deviation…

A: It is given that Sample size n = 78 Sample mean M = 16.4 Population SD = 3.3 The critical value of Z…

Q: Determine the margin of error for the confidence interval for the mean: 19±0.9

A: Given: 19±0.9

Q: Consider the following results for two independent random samples taken from two populations. Sample…

A: a.The point estimate of the difference between the two population means is given below,

Q: Independent random samples were selected from population 1 and population 2. The following…

A: (a) Obtain the 95% confidence interval for estimating the difference in the population means. The…

Q: A random sample of male and female employees selected from a large industrial plant yielded the…

A:

Q: Determine the margin of error for the confidence interval for the mean: 22 +1.9

A: We know that ; Confidence interval = Point estimate +- Margin of error Upper confidence interval =…

Q: 4. A random sample of 64 bicycle-riding adults in Portland indicated that 24 always wore a helmet…

A:

Q: Consider two independent random samples with the following results: n1=685pˆ1=0.41n1=685p^1=0.41…

A: Given, n1 = 685 p^1=0.41 n2=510p^2=0.23

Q: Consider two independent random samples with the following results: n1=685pˆ1=0.41n1=685p^1=0.41…

A: From the provided information,

Q: Determine the margin of error for the confidence interval for the mean: 16±1.6

A: Given confidence interval is 16±1.6 margin of error E=?

Q: 1. The lifetime of a 75 watts lightbulb is normally distributed with mean µ hours and variance σ2.…

A:

Q: 1) An electronic manufacturer produces lampshades with a life span of approximately normally…

A: Given: standard deviation(σ)=35

Q: A college student organization wants to start a nightclub for students under the age of 21. To…

A: Solution: From the given information, confidence level is 0.90 and E=0.05.

Q: The following sample of diameters was taken from 7 nuts off the assembly line. Construct the 98%…

A:

Q: A random sample of 55 washing machines  has a  mean price  of 119 pounds  .Assume the population…

A:

Q: A sample of size n=11 has a sample mean xbar=15.6 and sample standard deviation s=2.4 Construct a…

A:

Q: Suppose a random sample of 32 National Football League players had an average weight of 252.5…

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Q: Estimate the sample size needed of water samples so that a 95% confidence interval will have a…

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Q: 16) Construct a 95% confidence interval for the difference between the two population proportions…

A:

Q: A sample of size 78 produced the sample mean of 16.4. Assuming the population standard deviation…

A: Givensample size(n)=78sample mean(x)=16.4standard deviation(σ)=3.3α=1-0.99=0.01α2=0.005Critical…

Q: 1. A random sample of 12 kindergarten students yielded a mean weight of 26kg with sample standard…

A: Given that  1. A random sample of 12 kindergarten students yielded a mean weight of 26kg with sample…