The average number of cavities that thirty-year-old Americans have had in their lifetimes is 7.  Do twenty-year-olds have a different number of cavities? The data show the results of a survey of 11 twenty-year-olds who were asked how many cavities they have had. Assume that the distribution of the population is normal. 4, 8, 5, 7, 7, 4, 8, 5, 4, 4, 6 H0=? H1=? The test statistic    = ? (please show your answer to 4 decimal places.) The p-value = ? (Please show your answer to 5 decimal places.)

Q: State the two types of statistics and give two examples for each category

A: Given that  We have to describe two types of statistics and it's example

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A: The variables are: chess piece used, the location of the piece and the length of time used to make…

Q: What proportion of the ships had scores of 95 or higher? a) 0.8118 b) 0.7473 c) 0.1882 O d) 0.2796…

A:

Q: histogram? Frequency 12 10 8 6 120 124 128 132 136 140 144 148 amount of sugar (mg) O126 snacks have…

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Q: physicians

A: Number of success = x= 3145 n=5804

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A:

Q: 3. Students in a class were asked the make of their cars. Out of 100 students, 15 had Honda, 16 had…

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Q: A running coach wants to know if participating in weekly running clubs significantly improves the…

A: Option a) is correct.

Q: HO 40 45 50 55 60 65 70 75 80 85 90 Arsenic (ppb) Ⓡ How many measurements taken in this time frame…

A: Given polygon.Want to calculate how many measurements taken in this time frame were within ppb…

Q: Cumulative frequencies are used along the Y axis in the construction of the graph a. Time series…

A:

Q: Part 2 of 4 Points: 0 of 1 Listed below are pulse rates (beats per minute) from samples of adult…

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Q: Calculate the Relative Frequency of patients living less than 5 months after the start of treatment.

A: Since , n=40 Our aim is to Calculate the Relative Frequency of patients living less than 5 months…

Q: The administration team compiled test results for those who had been tested for strep throat in a…

A: The objective of the question is to determine the ratio of false positives to true positives based…

Q: Determine whether the number described is a statistic or a parameter. The average ACT score of all…

A: The statistic is a measure or characteristics based on sample values. The parameter is a measure or…

Q: These dot plots show the weights (in kilograms) from a sample of leopards and tigers. Leopards 20 40…

A: Given: Dot plots shows the weights  in kilogram from a sample of leopards and tigers To Find:…

Q: The data below is the number of hours that people work per week at your job.  Construct the…

A:

Q: This histogram shows the distribution of times, in minutes, required for 25 rats in an animal…

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Q: Studies are often done by pharmaceutical companies to determine the effectiveness of a treatment…

A: The formula of range is,

Q: s known that o = 2.15 pounds. %3D sample should be taken to be 93% confident that the sample mean is…

A: The sample size can be calculated as: n=z×σE2 Here, z = desired confidence level E = The allowable…

Q: Data is given as per    40,   80,  100.   If the first two are equally important and the third (100)…

A: Given data: 40, 80, 100 First two are equally important and the third (100) is half as important as…

Q: he mean number of sick days an employee takes per year is believed to be about 10. Members of a…

A: Given: The number of six days per year. μ0=10n=8α=0.05

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A:

Q: Test Statistic: P-value = Decision:

A: The independent sample t-test is used when we want to compare two means of independent samples drawn…

Q: In one of Boston's public parks, mugging in summer months has been a serious issue. A police cadet…

A: x 10 15 16 1 4 6 18 12 14 7 y 5 2 1 9 7 8 1 5 3 6…

Q: Consider the cholesterol levels of a given population withµ = 200 and o 24. A sample of 9 people…

A:

Q: The life span in Honolulu is approximately normally distributed. The mean life span is 77 years. A…

A:

Q: Find the critical value. The critical value is zo =. %3D

A: Given α=0.10

Q: The size of fish is very important to commercial fishing. A study collected the lengths of Atlantic…

A: 31, 44, 45, 45, 46, 48, 48, 48, 48, 49, 50, 50, 50, 51, 52, 53, 53, 54, 60, 67

Q: What can be concluded at the a 0.05 level of significance? a. For this study, we should use Soactan…

A: Given: μ=10X: {3,13,11,10,12,13,9,11,12,12,11,13,10}X¯=11.23077n=13s=1.42325

Q: The high temperature, in degrees Fahrenheit, for eight cities on the same day are below. Which…

A: Skewness is the measure of the asymmetry of an ideally symmetric probability distribution. The 2…

Q: Assume that the average home price in the U.S. is µ = $292,700 with o = $60,000. A local real estate…

A: Hypothesis: The null and alternative hypotheses are below: H0: μ=292,700H1: μ>292,700 The test…

Q: 2. The speeds (in km/hr) of 14 roller coasters found around the world are given below. Find the…

A: First arrange the data in ascending order. Median is calculated as,…

Q: Refer to the figure at the right. At a= 0.10, can you reject the claim that the proportion of 18 to…

A: Denote p1, p2 as the true population proportions of 18-24-year-olds men and women, who living in…

Q: Before the furniture store began its ad campaign, it averaged 213 customers per day. The manager is…

A: D.   Consider that μ defines the population mean number of customers.   Here, it is needed to check…

Q: A group of patients were classified in terms of their smoking habits and the incidence of…

A: Here we are given a 3×2 contingency table where the variables are "Smoking Habits" and…

Q: The manager of a fleet automobiles is testing two brands of radial tires and assigns one tire of…

A: We use t-test statistic to compare means of two samples. H0: there is no difference between means of…

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

A: For the given data perform z test for two proportion test

Q: Refer to the figure at the right. At a= 0.10, can you reject the claim that the proportion of 18 to…

A:

Q: A car salesman collected data on how many cars were sold at a dealership per day for two weeks. The…

A: The data for no. of cars sold in 2 weeks is as follows: 6, 7, 4, 3, 1, 2, 6, 6, 6, 7, 4, 4

Q: Find the standardized test statistic. z= 2.29 (Round to two decimal places as needed.) Can you…

A: Sample sizes n1=248 , n2=244 Sample proportion p1^=0.515 , p2^=0.412

Q: City A standard deviation: 20.84 thousand dollars City B standard deviation: 14.71 thousand dollars…

A: It is been asked to find the data in which empirical rule can be used, percent of income between…

Q: O whether or not a person who takes the drug gets a headache. O all individuals who take the…

A: Solution : d ) Option 4 The proportion of those who take the drug who get a headache.