Step 3 of 3 :Draw a conclusion and interpret the decision.   1. We reject the null hypothesis and conclude that there is insufficient at a 0.10 level of significance to support the claim that the average price of electricity, even after adjusting for inflation, changed between 2018 and 2019.   2. We fail to reject the null hypothesis and conclude that there is insufficient at a 0.10 level of significance to support the claim that the average price of electricity, even after adjusting for inflation, changed between 2018 and 2019.   3. We reject the null hypothesis and conclude that there is sufficient at a 0.10 level of significance to support the claim that the average price of electricity, even after adjusting for inflation, changed between 2018 and 2019   4. We fail to reject the null hypothesis and conclude that there is sufficient at a 0.10 level of significance to support the claim that the average price of electricity, even after adjusting for inflation, changed between 2018 and 2019.

Q: Exercise 2. A study is designed to test whether there is a difference in mean daily calcium intake…

A:

Q: Calcium is essential to tree growth because it promotes the formation of wood and maintains cell…

A:

Q: A hospital wants to compare its annual patient turnover rate per bed with similar hospitals. The…

A:

Q: Studies have shown that people who suffer sudden cardiac arrest have a better chance of survival if…

A: Independent and dependent variables in regression: In a simple regression, the variable of interest,…

Q: A test has been devised to measure a student's level of motivation during high school. The…

A: Denote X as the motivation scores on this test. It is given that X is normally distributed, with…

Q: Read this sample from the report. “In March 2015, 61 percent of workers in private industry had…

A: All categories do not represent industries not surveyed in the report because data points will not…

Q: Studies have shown that people who suffer sudden cardiac arrest have a better chance of survival if…

A: The accompanying data give y = survival rate (percent) and x = mean call-to-shock time (minutes) for…

Q: Studies have shown that people who suffer sudden cardiac arrest have a better chance of survival if…

A: The independent variable is mean call to shock time (x) and the dependent variable is survival rate…

Q: Peter analyzed a set of data with explanatory and response variables x and y . He concluded the mean…

A: Slope: The following is the formula for slope coefficient                                   b=r·sysx…

Q: Consider the following data representing the price of refrigerators (in dollars). 1260, 1446, 1106,…

A: Given data,1260, 1446, 1106, 1269, 1443, 1424, 1118, 1132, 1177, 1115, 1156, 1262, 1215, 1236, 1243,…

Q: n the year 1990 25% of students at a particular university received some sort of scholarship. The…

A: Given Data: p^=12/25=0.48n=25   Null and Alternate hypothesis: H0: p=0.25 Ha: p≠0.25

Q: Find the proportion of Normally distributed observations with a z-score below 0.02. Give your answer…

A: Solution-: We want to find, (a) The proportion of Normally distributed observations with a z-score…

Q: Use the given data and a 5% level of significance to determine whether the population varience for…

A:

Q: Assuming that sleep debt times are normally distributed and the 37th percentile is 41.2 minutes,…

A: here given   An organization has conducted polls on the sleeping habits of Americans. A particular…

Q: e are two major tests of readiness for college, the ACT and the SAT. ACT scores are reported on a…

A: For ACT scores:Mean of the distribution, Standard deviation of the distribution, The distribution of…

Q: (a) In a study of the gasoline mileage of model year 2011 automobiles, the mean miles per gallon was…

A: Mean = 27.5  Median = 26.8  Smallest value = 12.70  Largest value = 50.20  First quartile = 17.95…

Q: The table below contains unemployment rates for a sample of metropolitan areas in four regions of a…

A: null and alternative hypothesis      first choice is correct test statisticsF= 7.39 P value…

Q: Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor…

A: The question is about hypothesis testing.Given :Population mean tree planting time (  ) = 2…

Q: Calcium is essential to tree growth because it promotes the formation of wood and maintains cell…

A: H0:μ=0.15 mg/LH1:μ≠0.15 mg/L

Q: Rick took a test that is known to produce normally distributed grades with a mean of 72 and a SD of…

A:

Q: Consider the following data representing the price of refrigerators (in dollars). 1260, 1446, 1106,…

A: The given data is as follows:…

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: Consider the following data representing the price of refrigerators (in dollars). 1260, 1446, 1106,…

A: Given data,1260, 1446, 1106, 1269, 1443, 1424, 1118, 1132, 1177, 1115, 1156, 1262, 1215, 1236, 1243,…

Q: Over the last several months, a patient has been třeated for low calcium level. Recently, the…

A: The confidence interval for the population mean when data is given is, Confidence interval =x¯ ±…

Q: What is the relative frequency of deaths that occurred in 2000 or before?

A: Here Given the number of deaths between year 1994-2011 And total no of deaths=653782

Q: J.P. Morgan Asset Management publishes information about financial investments. Over the past 10…

A: Solution: Let x = S&P 500 (x)  x = 5.04%σx = 19.45%  and  y= real estate investment trusts…

Q: Studies have shown that people who suffer sudden cardiac arrest have a better chance of survival if…

A: The regression equation is y=101.26-9.23x.

Q: Research has shown that IQ scores have been increasing for years (Flynn, 1984, 1999). The phenomenon…

A:

Q: Suppose you are interested in the population of all college students in the US and that you collect…

A: The question is about parameter and Statistic The explanation as follows : 1 ) Parameter : 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.