Suppose that in a sample of 4625 customers at a food store, 2457 food shop more than once a week. Find a 99% confidence interval for the population proportion of customers who shop more than once a week. a) Is this a z-value or a t-value confidence interval? (Write z or t.) b) What is the z-value or t-value? c) = d) State the confidence interval. e) Interpret your result. f) A claim is made that 54% of all customers at a food store shop more than once a week. Using the results from part (d) of this problem, would this claim be valid or invalid?

Q: Use the Student's t distribution to find t, for a 0.95 confidence level when the sample is 27.

A: sample size=n=27 Degree of Freedom=n-1=27-1 =26 Confidence level is 0.95 Therefore the Level of…

Q: A recent study of high school students shows the percentage of females and males who have at LEAST…

A: The (1-α)% confidence interval for the difference in population proportions p1-p2 is given by;…

Q: Collect and summarize data into a test statistic. The sample mean difference = and the standard…

A: Determine the null and alternative hypotheses. H0: Null Hypothesis: μd =0 ( The students did not…

Q: this theory. Round answers to 4 decimal places where possible. a. With 90% confidence the proportion…

A: It is given that Favourable cases, x = 56Sample size, n = 745Confidence level = 90%

Q: A dietician is conducting a study to see how many pieces of fruit or vegetables American Adults eat…

A: Given, n = 11 and data set is : 7 5 9 6 10 12 10 1 1 6 5 Calculating Mean and Standard…

Q: A 98% confidence interval for the mean reading achievement score for a population of third-grade…

A: We want to tell you which one is the correct choice

Q: 1. We are interested in determining if absences from a class affect your overall class grade. The…

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…

Q: Two intervals are given, A and B, for the same value of the explanatory variable. A: 18.3 to 22.5…

A: a) Given Data:  A: 18.3 to 22.5 B: 16.6 to 24.2 We know that Prediction interval is always wider…

Q: A random sample of size n₁ = 23, taken from a normal population with a standard deviation 01 = 6,…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: 95% confidence interval for the true percent of workers in this city who have full health insurance…

A: The question is about confidence interval.Given :Randomly selected no. of workers ( n ) = 1700No. of…

Q: 24 A jam manufacturer claims that the mean amount of jam in its 5-ounces jars is 5.1 ounces. A…

A:

Q: n your random sample of home prices. To insert a tion" or simply copy and edit the equation in the…

A: Formula : The confidence interval formula is CI =

Q: The figure shows the results of a recent Marist poll asking about President Biden’s approval rating.…

A: *Answer:  Given the results of a recent Marist poll asking about President Biden’s approval rating.

Q: Two researchers drew samples to estimate the same population. Here are the confidence intervals they…

A: a. The confidence interval A is, (0.52, 0.58).

Q: A survey of 662 men shoppers found that 25% of them shop on impulse. What is the 90% confidence…

A: According to the given information, we have Confidence level = 90% = 0.90 Sample size, n = 662 Given…

Q: A research center survey of 2,388 adults found that 1,904 had bought something online. Of these…

A: Given: n=2,388α=0.05

Q: An error that occurs because of chance is called: nonsampling error. O sampling error. O probability…

A: An error that occurs because of chance is called as....

Q: The confidence interval at the 95% confidence level for mu(u) was reported to be (69.7, 90.3). Which…

A: Given, 95% confidence interval is (69.7, 90.3) lower limit at 95% C I = 69.7 upper limit at 95% C I…

Q: A confidence interval for a population mean has a margin of error of 3.3. a) Determine the length…

A: Given data, Margin of Error(E)=3.3

Q: Let p₁ be the proportion of students in English class who receive grade A, and p2 be the proportion…

A: Given,the sample proportions of Grade A in English class and Maths class.To choose the correct…

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: A psychologist is interested in constructing a 99% confidence interval for the proportion of people…

A: From the provided information,Confidence level = 99%

Q: Use the given data to construct a confidence interval of the requested level. X = 178, N=531,…

A: Given : Sample Size, n = N = 531 Number of successes, x = 178

Q: Find the confidence level if the n = 32 and xřight = 50.89. %3D

A: Given information- Sample size n = 32 We have given the value χright2=50.89 We have to find the…

Q: In order to make the decision for one business, your team constructed a 90% confidence interval, the…

A: For 90% confidence interval, the width of that confidence interval is 500.We have to reduce the…

Q: The following is a list of 14 measurements. 8, -13, -3, 47, -47, 37, 69, -52, -28, 23, 27, 58, -42,…

A: From the information, There are 14 measurements given as follows: 8, –13, –3,47,–47.…

Q: Find the 90% confidence interval for the true proportion of all adults in town who have healthcare

A:

Q: In a survey of 2009 adults in a recent year, 1263 say they have made a New Year's resolution.…

A:

Q: Which confidence interval is wider? O a. (x, y) O b. (M. N n 250 650 90% Confidence Interval (M, N)…

A: Given data is n 90% confidence interval 250 (M,N) 650 (X,Y)

Q: Which of the following would result in the narrower confidence interval?

A: Note: The confidence interval with small confidence level has the narrower confidence interval. The…

Q: A group of researchers is interested in middle school students and their willingness to appear to…

A:

Q: A survey​ asked, "How many tattoos do you currently have on your​ body?" Of the 1227 males​…

A:

Q: Data were collected on the amount spent by 64 customers for lunch at a major Houston restaurant.…

A: As per our guidelines we are supposed to answer only three subparts kindly post the remaining…

Q: A psychologist is interested in constructing a 99% confidence interval for the proportion of people…

A: From the provided information,Confidence level = 99%

Q: 1- A researcher wants to learn the ratio of smoking habit among the university students. Out of 1000…

A:

Q: 1- A researcher wants to learn the ratio of smoking habit among the university students. Out of 1000…

A: For male students, sample size is n = 1000 And number of students who said " yes I am smoking", X =…

Q: A survey asked, "How many tattoos do you currently have on your body?" Of the 1241 males surveyed,…

A: We have given that,  X1 = 182, n1 = 1241  And  X2 = 139, n2 = 1047 Then,  We will find the 99%…

Q: If n=550 and X = 440, construct a 90% confidence interval. Give your answers to three decimals <p<

A:

Q: Translate the statement into a confidence interval. Approximate the level of confidence. In a survey…

A: