Harper's Index reported that 80% of all supermarket prices end in the digit 9 or 5. Suppose you check a random sample of 112 items in a supermarket and find that 87 have prices that end in 9 or 5. Does this indicate that fewer than 80% of the prices in the store end in the digits 9 or 5? Use α = 0.05. 1. What is the value of the sample test statistic? (Round your answer to two decimal places.) 2. Find the P-value of the test statistic. (Round your answer to four decimal places.)

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Q: this probiem, carry at least lour digits alteer the decimal in your calculadons. Answers may vary…

A: It is given that margin of error (E) is 0.03 and the confidence level is 0.80.

Q: Can you give the statistical table you have used to get the 1.96? Thank you.

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Q: What does​ Chebyshev's rule say about the percentage of observations in any data set that lie within…

A: The question is about the Chebyshev's rule.

Q: The claim is that weights (grams) of pennies made after 1983 have a mean equal to 2.500 g as…

A: Answer - The claim is that weights of pennies made after 1983 have a mean equal to 2.5 g…

Q: . Assume prior studies have shown that about 60% of full - time students earn bachelor's degrees in…

A: b) When the prior estimate of the true proportion is known, the minimum sample size can be computed…

Q: According to the Chebyshev's rule, the proportion of observations within 2.5 standard deviations of…

A:

Q: Given a set of data that is skewed-right, there is at least % of the data within 3 standard…

A: Given

Q: Women athletes at a certain university have a long-term graduation rate of 67%. Over the past…

A: H0 : p =0.67 H1 : p <0.67 Population proportion = p₀ = 0.67 Sample number of events = x =23…

Q: Is the difference between the mean annual salaries of entry level architects in Denver, Colorado,…

A: Step 1:Step 2:P value=0.453 (3 decimal places) Step 3:Decision: Since, p value> level of…

Q: Suppose that you are attempting to estimate the weight of 600 parts. In order to use the infinite…

A:

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: It is given that:

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A:

Q: How many business students must be randomly selected to estimate the mean monthly earnings of…

A: From the given information,Confidence level ,C = 0.95 Using formula,

Q: A TV weatherman end of the year analysis of the local weather showed that among all the years for…

A: Z-score: The Z-score measures a particular value’s relationship to the mean, in a group of values.…

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A:

Q: An aptitude test in Mathematics was conducted to 1000 students. The mean of the test is 62 and the…

A: GivenMean(μ)=62standard deviation(σ)=8

Q: The University of Sydney conducted a survey to find out the average number of hours an academic…

A:

Q: The College Board reported the following mean scores for the three parts of the SAT: Critical…

A: Provided information is: The College Board reported the following mean scores for the three parts of…

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

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Q: A politician thinks he should invest more money into improving his website due to the large amount…

A: Population includes all the observation aimed for the research or survey. Sample is the small part…

Q: You are conducting a study to see if the mean doctor's salary (in thousands of dollars) is…

A: Given:   Sr. No. Salary (x) 1 79.79 2 82.14 3 82.44 4 80.19 5 88.62 6 94.42 7…

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Given data How hard is it to reach a business person by phone? and given  let p be the proportion of…

Q: Have you ever noticed, when watching a National Hockey League (NHL) game, that the players spend a…

A:

Q: Percentage of 18- to 24-year olds living in parents' homes Refer to the figure at the right. At a…

A:

Q: What does​ Chebyshev's rule say about the percentage of observations in any data set that lie within…

A: The Chebeyshevv's inequality is stated as, for a random variable, X with finite mean, μ and…

Q: Women athletes at the a certain university have a long-term graduation rate of 67%. Over the past…

A: 1) It is given that sample size n is 37 and the number of women athletes are graduated x is 21.

Q: The percent fo Coloradans that own a Subaru is 56%. If you were to take a random sample of size 70,…

A: We have given that,  Let X be the random variable from binomial distribution with probability (p) =…

Q: Each observation in a random sample of 101 bicycle accidents resulting in death was classified…

A: The total number of accidents is 101.

Q: In a study about children's pocket money, two samples of schoolchildren were asked how much money…

A: Combined mean=n1x1+n2x2n1+n2 Given that, n1=first sample size of childrens pocket money=87 x1=first…

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A: Given data: No. of movies Frequency 0 4 1 2 2 2 3 6 4 4 5 3

Q: You want to see if the average grade for nontraditional age students is less than the average grade…

A: State the hypotheses. That is, there is no evidence to conclude that average grade for…

Q: 2. This is a sample of 10 random seasons in the National Hockey League, Wayne Gretzky scored 50%…

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Q: Determine the sample size required to estimate the mean score on a standardized test within 2 points…

A: Given,margin of error(E)=2standard deviation(s)=15α=1-0.98=0.02α2=0.01Z0.01=2.33      (from Z-table)

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A: Given, Mean weight of cantaloupes is 700 gm. Standard deviation is 53 gm

Q: During a weight loss study, each of eight subjects were given a diet for 4 months. Use the table,…

A: Given, Difference -17 -17 -17 -18 -15 -18 -14 -21 -17.13 2.10 The mean of the difference is…

Q: Is the difference between the mean annual salaries of registered nurses in State A and State B equal…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.