According to a report, the mean of monthly cell phone bills was $48.66 three years ago. A researcher suspects that the mean of monthly cell phone bills is different from 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 Il error. (a) State the hypotheses. Họ: H1: (Type integers or decimals. Do not round.) (b) Explain what it would mean to make a Type I error. Choose the correct answer below. O A. The sample evidence led the researcher to believe the mean of the monthly cell phone bill is different from $48.66, when in fact the mean of the bill is $48.66. O B. The sample evidence did not lead the researcher to believe the mean of the monthly cell phone bill is higher than $48.66, when in fact the mean of the bill is higher than $48.66. O C. The sample evidence did not lead the researcher to believe the mean of the monthly cell phone bill is different from $48.66, when in fact the mean of the bill is different from $48.66. O D. The sample evidence led the researcher to believe the mean of the monthly cell phone bill is higher than $48.66, when in fact the mean of the bill is $48.66. (c) Explain what it would mean to make a Type Il error. Choose the correct answer below. O A. The sample evidence led the researcher to believe the mean of the monthly cell phone bill is different from $48.66, when in fact the mean of the bill is different from $48.66. O B. The sample evidence did not lead the researcher to believe the mean of the monthly cell phone bill is higher than $48.66, when in fact the mean of the bill is higher than $48.66. O C. The sample evidence led the researcher to believe the mean of the monthly cell phone bill is different from $48.66, when in fact the mean of the bill is $48.66. O D. The sample evidence did not lead the researcher to believe the mean of the monthly cell phone bill is different from $48.66, when in fact the mean of the bill is different from $48.66.

A survey was undertaken to compare the educational background of several different generation. One generation of interest was the Millennials (those born after 1980). A sample of 650 Millennials was taken, and each was asked to report the highest level of completed education. It was found that 214 of those surveyed had completed a Bachelor's degree or higher. With 98% confidence, we estimate between ______% and _______% of all Millennials have completed a Bachelor's degree or higher. (After converting to percentages, round the limits of your interval to two decimal places.) A sample of 682 Gen Xers (those born between 1965 & 1980) was taken and they were asked the same question. Of this sample, 169 individuals had completed a Bachelor's degree or highter.  With 98% confidence, we estimate between ______% and ______% of all Gen Xers have completed a Bachelor's degree or highter. (After converting to percentages, round the limits of your interval to two decimal places.)

In a one-tail hypothesis test where you reject Ho only in the lower tail, what is the p-value if ZSTAT =-116? Click here to view page 1 of the Normal table, Click here to view page 2 of the Normal table. The p-value is (Round to four decimal places as needed.)

A beer store wanted to test the difference on drinking habits if a younger group of 21-30 years old (n=8) to an older group of 50 to 60 years old (n=10). The store took a survey of beers per year each person had in both groups and found the following data:  21-30 group  50-60 group 50        35 17        64 25        39 88          75 53         61 62        89 36        45 29        35          29          78 State the hypotheses of the study.b. Find the critical t value for this study at an alpha level at α=.05.c. Compute the independent t testd. If significant, perform a percentage of variance test.e. State the results in APA format (numbers and words) and don’t forget to include all parts in the sentence and the direction of the results.

In a small town in New York, we initiated a cohort study and followed 5,900 people for a mean follow-up of 2 years. At the end of the 2nd year, none of the participants was lost to follow-up. During this follow-up, we identified 600 cases of Covid-19. What was the cumulative incidence? O 10 cases O 10.1% O 50.8% O 10.1 per 1,000

Fill in the blanks with either small or large. A) You are more likely to reject the null hypothesis when the effect size is _____. B) You are more likely to reject the null hypothesis when the standard deviation is _____. C) You are more likely to reject the null hypothesis when the standard error is  _______.

Xu and Garcia (2008)conducted a research study demonstrating that 8-month-old infants appear to recognize which samples are likely to be obtained from a population and which are not. In the study, the infants watched as a sample of n = 5 ping-pong balls was selected from a large box. In one condition, the sample consisted of 1 red ball and 4 white balls. After the sample was selected, the front panel of the box was removed to reveal the contents. In the expected condition, the box contained primarily white balls like the sample, and the infants looked at it for an average of M = 7.5 seconds. In the unexpected condition, the box had primarily red balls, unlike the sample, and the infants looked at it for M = 9.9. The researchers interpreted the results as demonstrating that the infants found the unexpected result surprising and, therefore, more interesting than the expected result. Assuming that the standard error for both means is σM = 1 second, draw a bar graph showing the two sample…

Number 11

An elementary school claims the variation in reading scores of its fourth grade students is less than o = 3. 25. Determine whether the hypothesis for this claim is left-tailed, right-tailed, or two-tailed. left-tailed right-tailed two-tailed

The following data are from a completely randomized design. In the following calculations, use a = 0.05. Treatment Treatment Treatment 2 3 64 82 69 47 71 53 54 87 60 35 64 46 50 76 57 2 148.67 108.67 96.67