statistics and Probability

Image transcription text

In general.ZX2 ls_?_?_to (2):)

# Tag: Statistics

## critical Values For Quick Reference During This Activity. confidence Levelcritical Value0.90 z∗=1.645 Professional Essay Help

Critical values for quick reference during this activity.

Confidence levelCritical value0.90

z∗=1.645

0.95

z∗=1.960

0.99

z∗=2.576

In a poll of 1000 randomly selected voters in a local election, 913 voters were against fire department bond measures.

What is the 99% confidence interval? [smaller value, larger value]

## suppose You Roll A Pair Of 4 Sided Fair Dice And Sum Compare And Contrast Essay Help

suppose you roll a pair of 4 sided fair dice and sum totals is X assume that the two rolls are independent clearly X is a random variable over the set {2,3,4,5,6,7,8} which value that has the highest probability in all the set? show calculation

## 18 it Is Thought That Prehistoric Indians Did Not Take Their Essay Help Site:edu

Question 18

It is thought that prehistoric Indians did not take their best tools, pottery, and household items when they visited higher elevations for their summer camps. It is hypothesized that archaeological sites tend to lose their cultural identity and specific cultural affiliation as the elevation of the site increases. Let x be the elevation (in thousands of feet) for an archaeological site in the southwestern United States. Let y be the percentage of unidentified artifacts (no specific cultural affiliation) at a given elevation. Suppose that the following data were obtained for a collection of archaeological sites in New Mexico:

x

5.25

5.75

6.50

7.25

8.00

y

26

17

52

80

64

Calculate the sample correlation coefficient r. Round your answer to three decimal places.

Group of answer choices

-0.933

0.850

0.067

0.150

## statistical Analysis

STATISTICAL ANALYSIS

## 21 it Is Thought That Prehistoric Indians Did Not Take Their Essay Help Us

Question 21

It is thought that prehistoric Indians did not take their best tools, pottery, and household items when they visited higher elevations for their summer camps. It is hypothesized that archaeological sites tend to lose their cultural identity and specific cultural affiliation as the elevation of the site increases. Let x be the elevation (in thousands of feet) for an archaeological site in the southwestern United States. Let y be the percentage of unidentified artifacts (no specific cultural affiliation) at a given elevation. Suppose that the following data were obtained for a collection of archaeological sites in New Mexico:

x

5.25

6.00

6.50

7.25

7.75

y

10

24

60

73

79

At an archaeological site with elevation 6.75 (thousand feet), what does the least-squares equation forecast for the percentage of culturally unidentified artifacts? Round your answer to the nearest tenth of a percent.

Group of answer choices

67.2%

47.7%

30.0%

55.1%

## 22 it Is Thought That Prehistoric Indians Did Not Take Their Essay Help App

Question 22

It is thought that prehistoric Indians did not take their best tools, pottery, and household items when they visited higher elevations for their summer camps. It is hypothesized that archaeological sites tend to lose their cultural identity and specific cultural affiliation as the elevation of the site increases. Let x be the elevation (in thousands of feet) for an archaeological site in the southwestern United States. Let y be the percentage of unidentified artifacts (no specific cultural affiliation) at a given elevation. Suppose that the following data were obtained for a collection of archaeological sites in New Mexico:

x

5.75

6.75

7.75

8.50

9.25

y

27

16

46

62

95

What percentage of the variation in y cannot be explained by the corresponding variation in x and the least-squares line? Round your answer to the nearest tenth of a percent.

Group of answer choices

3.4%

18.4%

81.6%

9.7%

## image Transcription Text you Measure 47 Watermelons Weights, And Find College Application Essay Help Online

Image transcription text

You measure 47 watermelons weights, and find they have a mean weight of 48 ounces. Assume the population standard deviation is 10.1 ounces. Based on this, what is the maximal margin of error assoc with a 95% confidence interval for the true population mean watermelon weight. Give your answer as a decimal, to two places ounces Submit Question Question 3 0/1 pt 9 6 O Det You measure 44 randomly selected textbooks’ weights, and find they have a mean weight of 70 ounces Assume the population standard deviation is 6.8 ounces. Based on this, construct a 90% confidence interva for the true population mean textbook weight. Give your answers as decimals, to two places Submit Question

… Show more

## image Transcription Text 642 105#f/skip/4 Su Homework 08 (linear Regression) College Essay Help Los Angeles

Image transcription text

642 105#F/skip/4 Su Homework 08 (Linear Regression) Score: 0/4 0/4 answered Question 4 Many people believe that gender, weight, drinking habits, and many other factors are much more important in predicting blood alcohol content (BAC) than simply considering the number of drinks a person consumed. Here we examine data from 16 student volunteers at Ohio State University who each drank a randomly assigned number of cans of beer. These students were evenly divided between men and women, and they differed in weight and drinking habits. Find the 95% Confidence Interval for the coefficient. (a) The degrees of freedom is (b) so for a 95% confidence interval, the t value we want is (c) from the table we see the SE is (d) So the 95% confidence interval (to 4 decimal places) is Estimate Std. Error t value p-value (Intercept) -0.0127 0.0126 -1 0.332 beers 0.0178 0.0024 7.48 0 Submit Question

… Show more

## City Estimate Greenbay 500 Greenbay 148 Greenbay 170 Greenbay 250 Greenbay 500 College Essay Help Service

city Estimate GreenBay 500 GreenBay 148 GreenBay 170 GreenBay 250 GreenBay 500 GreenBay 400 GreenBay 50 GreenBay 200 GreenBay 150 GreenBay 80 GreenBay 50 GreenBay 76 GreenBay 800 GreenBay 138 GreenBay 2000 GreenBay 110 GreenBay 60 GreenBay 240 GreenBay 650 GreenBay 175 GreenBay 20 GreenBay 800 GreenBay 85 GreenBay 20 GreenBay 200 GreenBay 150 GreenBay 70 GreenBay 80 GreenBay 100 GreenBay 200 GreenBay 130 GreenBay 450 GreenBay 100 GreenBay 75 Chicago 1700 Chicago 102 Chicago 300 Chicago 1000 Chicago 2500 Chicago 3500 Chicago 2000 Chicago 2700 Chicago 2000 Chicago 1200 Chicago 1600 Chicago 1500 Chicago 400 Chicago 750 Chicago 800 Chicago 2000 Chicago 1200 Chicago 2200 Chieago 1500 Chicago 100 Chicago 1500 Chicago 2000 Chicago 1500 Chicago 1260 Chicago 1800 Chicago 900 Chicago 50 Chicago 400 Chicago 980 Chicago 2256 Chicago 1300 Chicago 1800 Chicago 1800 Chicago 1500 Chicago 275

Image transcription text

Anchoring 6.3.13 Recall the study about anchoring from Exercise 6.2.16, in which students estimated the population of Milwaukee after some had been told about Chicago and others about Green Bay. (This uses the dataset Milwaukee.) a. Describe in words the parameter(s) of interest in the context of this study. b. In the context of the parameter(s) described in part (a), express the null and alternative hypotheses for testing whether the class data give strong evidence in support of the anchoring phenomenon described above. If you use symbols, make sure to define them. c. Check whether the conditions for the validity of the theory-based t-test to compare two means are satisfied here. d. Use appropriate technology (an applet or a statistical software package) to conduct a t-test of significance of the hypotheses that you stated in part (b). Report the test statistic and p-value. e. State your conclusion in the context of the study, being sure to comment on statistical significance. f. Determine and interpret the 95% confidence interval using a theory-based approach for the parameter(s) of interest in the context of the study. g. Comment on causation and generalization for this study.

… Show more