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The sample data seems to suggest that weekly earnings for males and female workers are different. To reassure yourself, use an appropriate statistical method to examine if the population mean earnings are different for male and female workers. Clearly indicate any assumptions made.
(Male) : ?(bar)= 1439.96 ?= 718.98 n= 427
(Female) : ?(bar)= 1787.29 ? = 1145.20 n= 672
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- Suppose the null hypothesis is rejected. State the conclusion based on the results of the test. Three years ago, the mean price of a single-family home was $243,704. A real estate broker believes that the mean price has decreased since then. Which of the following is the correct conclusion? O A. There is not sufficient evidence to conclude that the mean price of a single-family home has not changed. B. There is sufficient evidence to conclude that the mean price of a single-family home has decreased. C. There is sufficient evidence to conclude that the mean price of a single-family home has not changed. D. There is not sufficient evidence to conclude that the mean price of a single-family home has decreased.Which of the following are correct interpretations of the value of ? Please enter the letters for ALL correct answers. Multiple answers: Multiple answers are accepted for this question Select one or more answers: a. It is the observed value of the dependent variable. b. It is the point estimate for the mean value for all units or subjects at a given value of the independent variable. c. It is the predicted value for a single specific unit or subject at a given value of the independent variable. d. It is the predicted value of the independent variable.-: 14 Calculate the mean diviation (from mean) from the following data: 60-70 Marks :0-10 10-20 20-30 30-40 40-50 50-60 No. of : 6 8. 15 6. Students.
- A sample of nine tourists indicated how much they spent on accommodation per night (in dollars) at a popular holiday destination. The amounts they paid for accommodation were as follows: 313.6 151.6 598.5 222.7 293.9 272.6 198.5 382.0 188.7 What is the difference between the median and the mean of the sample (correct to 2 decimal places)? Use (median - mean) as the order of the difference. P Note:- Do not provide handwritten solution. Maintain accuracy and quality in your answer. Take care of plagiarism. Answer completely. You will get up vote for sure.It was hypothesized that there will be a difference in the average test score in Chemistry class between high schoolers who watched Breaking Bad (Group 1) and high schoolers who did not watch Breaking Bad (Group 2). Calculate and use the appropriate statistical test to analyze the data below. Be sure to write the appropriate sign (+ or -) before your value. Note: SHOW YOUR WORK! watched breaking bad 86 99 91 94 98 92 97 93 n=8 M=93.25 SS=127.5 did not watch breaking bad 90 79 82 86 85 83 82. 81 n=8 M= 83.50 SS=82 Based on your answers above, what is your conclusion regarding the null? Retain the null Reject the null Write out your conclusion. It does not have to be in APA format but should be written in sentence form.You are the product manager for "Natural Agriculture". The company president asked you to determine if "Natural Agriculture" has equal sales as "Farmers Co.", which is a strong competitor. The table below contains weekly sales for competing brands for randomly selected 4 approximately equal size stores that did not follow a normal distribution. (Use two digits after deimal point) Natural Farmers Co. Agriculture 2100 2600 1700 1500 1900 1700 1500 2100 Is there a difference between mean sales at a=5%? а. Но: H;: Since test statistic = is than critical value = we and Therefore mean sales are b. Can it be concluded at 5% significance level that the population median sales for Farmers Co. exceeds 1900? Ho: H;: test statistic = Since a=0.05 is than the p-value = and There is evidence to we
- Refer to the figure at the right. At a =0.10, can you reject the claim that the proportion of 18 to 24-year-olds living in their parents' homes in 2000 was the same for men and women? AsSsume the survey included a random sample of 248 men and 244 women. Percentage of 18- to 24-year olds living in parents' homes 70,. 51.5% 41.2% 46.6% 44.3% 2000 2012 O Men Women Identify the null and alternative hypotheses. Choose the correct answer below. O A. H,: P, +P2 Ha: P1 = P2 O B. Ho: P, P2 c. Họ: P1 = P2 O D. Ho: P1 > P2 Ha: P, SP2 Ha: P1 #P2 Find the critical value(s). The critical value(s) is(are) +1.65 (Round to two decimal places as needed. Use a comma to separate answers as needed.) Find the standardized test statistic. z= 2.29 (Round to two decimal places as needed.) Can you reject the claim that the proportion of 18 to 24-year-olds living in their parents' homes was the same for men and women in 2000? V, at the 10% significance level, there is evidence to the claim.Before the furniture store began its ad campaign, it averaged 182 customers per day. The manager is investigating if the average has changed since the ad came out. The data for the 11 randomly selected days since the ad campaign began is shown below: 194, 170, 172, 180, 151, 169, 179, 181, 167, 170, 194 Assuming that the distribution is normal, what can be concluded at the a = 0.01 level of significance? %3D a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Но: ? v Select an answer v H1: ? v Select an answer ♥ c. The test statistic ? v (please show your answer to 3 decimal places.) %3D d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? va f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... the null hypothesis. O The data suggest that the population mean number of customers since the ad campaign began is not significantly different from 182 at a = 0.01, so there is…Hellen has just started a new years competition for her local climbing gym. There are two categories for this competition: singles and group (18 people). The rules are simple, put in the most hours in one months time and you get a guided tour to climb Ten Sleep canyon. She knows from running this competition over the years that the number of hours climbers at her gym spend training during this competiton is approximately normal and their mean competition hours per month in the gym are 24 hrs with a standard devaition of 6 hrs. Singles Distribution: X~N( , ) Group Distribution: x̄~N( , ) The winning single participant last year was in the 97 th percentile.... how many hours did the winner accumulate over the month? One of Hellan's friends Dave put in 27.12 hours on the wall. What is the probablity that another individual will beat his time? If someone puts in between 25.5-32.1 hours on the wall they get a Mountain Goat shirt. What percent of the singles competitors is expected to…
- In a city with three high schools, all the ninth graders took a Standardized Test, with these results: Number of ninth graders High School Mean score on test Glenwood 77 264 Central City Lincoln High 91 303 70 170 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 79.3. Of course, that is incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place. mean of all ninth grader's scores =This is a friendly reminder about scientific notation. Excel reports very small numbers in scientific notation. For example, 8.15E-05 is typical notation for 8.15 x 10-5. The exponent of -5 means you have to move the decimal five places to the left and fill in with zeroes. What you get is 0.0000815. Here is the Excel output again for the regression of Sales and Experience: Regression Statistics 0.5966 0.3559 0.339 497.9058 Multiple R R Square Adjusted R Square Standard Error Observations ANOVA Regression Residual Total Intercept Experience (months) 40 df 1 38 39 Coefficients 6.6108 SS MS 5205388.04 5205388.04 9420585.51 Standard Error 4250.9742 180.2332 14625973.55 1.4427 247910.15 t Stat 23.586 4.5822 P-value 2.71E-24 4.85E-05 F 20.9971 Lower 95% Upper 95% Significance F 4.85E-05 3886.1113 4615.8372 3.6902 The analyst decides to use an a = 0.05 significance level. Is there a statistically significant relationship between Sales and Experience? 9.5313Considering salary of employee's in a company, the mean salary of managers is $102,000 per year. Is this number a statistic or parameter?
