safety rules in operating farm tractor with trailer before, during, and after operation

The weights (in pounds) of 30 participants are recorded before and after a 6 week exercise program.

Question - Part 1

Calculate the difference between the before weight and after weight of all 30 participants, where a negative value represents losing weight. Then, find the mean difference of weights. (Round your answer to the nearest hundredth)

Question - Part 2

Next, find the sample standard deviation for the difference of weights. (Round your answer to the nearest hundredth)

Question - Part 3

The goal is to find the 90% confidence interval for the difference in weight. Find the t-critical value. (Round your answer to the nearest thousandth)

t_.9 = ____

Question Part 4

Find the error, E, for the 90% confidence interval. (Round your answer to the nearest hundredth)

E = ____

Question - Part 4

Find the 90% confidence interval for the difference in weights. (Round all answers to the nearest hundredth)

< d <

What are your perspectives about accounting before and after taking the managerial accounting?

The Bank of America wants to assess the recommendations before the change vs. the recommendations after the change as a result of a recent internal policy change. It has gathered the follow data:

1. 152 Bank of America customers were studied.

2. Of the 152, 102/152 recommended the bank before the change whist 50/152 did not recommend the bank before the change.

3. Of the 152, 132/152 recommended the bank after the change whilst 20/152 did not recommend the bank after the change.

1. Use the information above to answer questions (a) and (b).
   1. Perform a statistical test to see whether the proportion of members who would recommend the bank of america have increased because of the change.
   2. Construct a 99% confidence interval for the difference of the proportions, before and after the change, of members who would recommend the bank of america

it is a scenario and use Gibbs cycle of reflection
plus some questions

1) What is the concentration of Fe3+ (after mixing but before reacting) in a solution made with 2.73 mL of 0.0639 M Fe(NO3)3 and 3.89 mL of 0.0231 M KSCN? Please include units in your answer.

2) What is the concentration of a CV solution measured in a 1 cm cuvette with an absorbance of 0.559 and a molar absorptivity of 4560 M^-1cm^-1? Please include units in your answer. Report your answer in decimal format to three significant figures.

The following table lists the weight of individuals before and after taking a diet prescribed by a weight-loss company for a month:

You may find this Student's t distribution table useful in answering the following questions. You may assume that the differences in weight are normally distributed.

a)Calculate the sample variance (s_d²) of the changes in individual weights. Give your answer to 2 decimal places.

s_d² =

b)A disgruntled customer states:

"This weight-loss company is a complete farce. All the people I know who signed up experienced no changes in their weight at all. I seriously doubt this diet has any effect whatsoever. I want my money back!"

You plan to do a hypothesis test on this claim where the hypotheses are:

H₀: the customer's claim is true and the program has no effect on weight
H_A: the customer's claim is not true and the program does have an effect on weight, whether it increases or decreases

According to the data given, you should accept, reject, not reject the null hypothesis at a confidence level of 90%.

In the week before and the week after a​ holiday, there were 11 comma 000 total​ deaths, and 5489 of them occurred in the week before the holiday.

a. Construct a 95​% confidence interval estimate of the proportion of deaths in the week before the holiday to the total deaths in the week before and the week after the holiday.

____ < p < ____

b. Based on the​ result, does there appear to be any indication that people can temporarily postpone their death to survive the​ holiday?

Compare in a paragraph before and after Covid-19 situation in terms of performance of the Sector

1. Retail Trade

• The Analysis can be Country-specific or Global.
• Page Limit: 3-4
• Tables, Graphs & Charts should be used to report findings.

The effect of social competence training is tested. 12 Subjects are tested before and after the training for social competence on a seven point scale. Data are ordinal scaled and not normally distributed. The question is, if social competence is enhanced by the training. Use Sign Test. Raw data are listed in the following table: Before 5 3 4 2 1 6 7 3 2 3 5 1 After 6 2 4 4 3 6 7 5 3 5 5 3

(x+0.5)-(n/2)/Squrt N/2

Ti-84

Stat edit enter both lists then stat calc 2 find X

Sub in and you get (3.5+.5)-(12/2)/ Squrt (12/2) =.2721 Got to A2 positive table or Cumulative area from the left for z - score and find z=.6064.

Am I doing this correctly and have I gone far enough please show your work thank you .