According to a report, the mean of monthly cell phone bills was $48.75 three years ago. A researcher suspects that the mean of monthly cell phone bills is less today (a) Determine the null and alternative hypotheses. (b) Explain what it would mean to make a Type I error. (c) Explain what it would mean to make a Type II error. (b) Explain what it would mean to make a Type I error. Choose the correct answer below A. The sample evidence led the researcher to believe the mean of the monthly cell phone bill is dfferent from $48.75, when in fact the mean of the bill is S48 75 O B. The sample evidence did not lead the researcher to believe the mean of the monthly cell phone bil is less than $48.75, when in fact the mean of the bil is less than $48 75. C. The sample evidence led the researcher to believe the mean of the monthly cell phone bill is less than $48.75, when in fact the mean of the bill is $48.75 O D. The sample evidence did not lead the researcher to believe the mean of the monthly cell phone bl is different from $48.75, when in fact the mean of the bill is different from $48.75 (c) Explain what it would mean to make a Type Il error. Choose the corect answer below. O A. The sample evidence led the researcher to believe the mean of the monthly cell phone bill is less than $48 75, when in fact the mean.of the bill is less than $48 75. B. The sample evidence did not lead the researcher to believe the mean of the monthly cell phone bit is less than $48:75, when in fact the mean of the bill is less than $48. 75 OC. The sample evidence led the researcher to believe the mean of the monthly cell phone bill is less than $48.75, when in fact the mean of the bill is $48.75. O D. The sample evidence did not lead the researcher to believe the mean of the monthly cell phone bil is different from $48.75, when in fact the mean of the bil is different from $48.75 Click to select your answer().

The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.

What would the null and alternative hypotheses be for the average amount of money a person keeps in his or her checking account is less than $24?

Elevator ride: Engineers are designing a large elevator that will accommodate 41 people. The maximum weight the elevator can hold safely is 8200 pounds. According to the National Health Statistics Reports, the weights of adult U.S. men have mean 192 pounds and standard deviation 64 pounds, and the weights of adult U.S. women have mean 172 pounds and standard deviation 73 pounds. Use the TI-84 Plus calculator. Part 1 of 3 (a) If 41 people are on the elevator, and their total weight is 8200 pounds, what is their average weight? The average weight is pounds. Part 2 of 3 (6) If a random sample of 41 adult men ride the elevatori what is the probability that the maximum safe weight will be exceeded? Round the answer to at least four decimal places The probability that the maximum safe weight will be exceeded is

The mean entry level salary of an employee at a company is $60,000. You believe it is lower for IT professionals in the company. State the null and alternative hypotheses.

Which of the following represents the correct order of a statistical analysis?    Formulate a hypothesis; Gather data; Determine rejection of the null hypothesis    Formulate a hypothesis; Determine rejection of the null hypothesis; Gather data   Determine rejection of the null hypothesis; Gather data; Formulate a hypothesis    Gather data; Formulate a hypothesis; Determine rejection of the null hypothesis

Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the standard deviation is 5. What is the probability of selecting a person with a score greater than Cody’s?

A B This graph has an r of -0.5. C D

A certain statistics instructor participates in triathlons. The accompanying table lists times (in minutes and seconds) he recorded while riding a bicycle for five laps through each mile of a 3-mile loop. Use a 0.05 significance level to test the claim that it takes the same time to ride each of the miles. Does one of the miles appear to have a hill? Click the icon to view the data table of the riding times. Determine the null and alternative hypotheses. Ho: H₁: Find the F test statistic. F = Find the P-value using the F test statistic. P-value = What is the conclusion for this hypothesis test? (Round to four decimal places as needed.) (Round to four decimal places as needed.) C O A. Fail to reject Ho. There is insufficient evidence to warrant rejection of the claim that the three different miles have the same mean ride time. O B. Fail to reject Ho. There is sufficient evidence to warrant rejection of the claim that the three different miles have the same mean ride time. O C. Reject…

A certain statistics instructor participates in triathlons. The accompanying table lists times (in minutes and seconds) he recorded while riding a bicycle for five laps through each mile of a 3-mile loop. Use a 0.05 significance level to test the claim that it takes the same time to ride each of the miles. Does one of the miles appear to have a hill? Click the icon to view the data table of the riding times. Determine the null and alternative hypotheses. Ho: H₁: xar Riding Times (minutes and seconds) Mile 1 Mile 2 Mile 3 3:15 3:23 3:24 3:22 3:20 3:19 3:22 3:21 3:16 3:18 3:33 3:30 3:28 3:30 3:28 (Note: when pasting the data into your technology, each mile row will have separate columns for each minute and second entry. You will need to convert each minute/second entry into seconds only.) Print Done X all Check answer