Using the following results, what should the researcher conclude? Source of Variation Between-groups Within-group Total SS 258.8 378.0 636.8 df 4 15 19 MS 64.7 25.2 F 2.57

A researcher found that the two groups (n=25 in each group) they tested were significantly different from each other with a t-value of 2.91, which has a corresponding p-value of p=.06. Report the findings in APA number format.

A researcher is looking at a new marketing campaign for a product. After 200 people watched the marketing campaign about 60 percent liked the product. Prior to the marketing campaign the product was liked by about 50 percent of people.  What are the chi-square test degrees of freedom for this research description?

Listed below are pulse rates​ (beats per​ minute) from samples of adult males and females. Does there appear to be a​ difference? Find the coefficient of variation for each of the two​ samples; then compare the variation. Male 8787 7171 6363 7070 7272 5050 6464 5656 8484 7171 6262 6262 9797 5555 6262   Female 6868 8181 8282 6969 7676 8484 8787 8888 8787 9090 9191 6868 8686 8181 7878   The coefficient of variation for the male pulse rates is nothing​%.

Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts​ (a) through​ (c) below.      ​Tinterval (13.046,22.15) x=17.598 Sx=16.01712719 n=50

Consider the following table: SS DF MS ? Among Treatments 4468.45 Error Total Step 2 of 8: Calculate the degrees of freedom among treatments. 10 706.87 15 LL F

4.2

A runner states that his average time for running a mile is 6.5 minutes.  Given the following times from 8 recent mile runs, test the claim that his  actual average is not what he states it to be at the a = 0.05 level of  significance.  6.25    6.6    6.8    7.2    6.3    7.0    6.5    6.75

cmid=855541&page=28 page n F5 Pat received the following grades in four classes. In Pat's History class, what is the percentage of students scoring higher than Pat? (round to two decimal places, don't include the % sign in your answer) % Subject Psychology Math History English Answer: F6 + W F7 Pat's Grade 75 90 86 83 W & F8 Class Mean 83 85 80 88 Pa F9 F10 Class Standard Deviation 8 6 4 A X F11 * F12 Home End Insert +1 Time left 1:35:4 Next page 12:54 PM *A*G 2/17/2023 Q T495S Delete Backspace

A study at Harvard found that 44% of their students binge drink.  You are at Princeton doing a similar study.  How many people do you need to interview to get your interval width down to 10 percentage points?  For a 95% CI, what is that sample size?