A random sample of 88 eighth grade students' scores on a national mathematics assessment test has a mean score of 281. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 275. Assume that the population standard deviation is 40. At a = 0.03, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). ..... (a) Write the claim mathematically and identify H, and Ha. Choose the correct answer below. Ο c. Ho: μ< 275 Hai µ2 275 (claim) A. Ho μ< 275 B. Ho: µs 275 (claim) Ha: µ> 275 Ha: u> 275 (claim) Ο D. H0: μ= 275 (claim) Haiµ>275 Ο Ε. Η: μ= 275 Ha: µ> 275 (claim) ΟF H0: μ2 275 (claim) Ha:µ<275 (b) Find the standardized test statistic z, and its corresponding area. z= 1.41 (Round to two decimal places as needed.) (c) Find the P-value. P-value = (Round to three decimal places as needed.)

After the premiere of the new comedy Bumblebee, moviegoers were asked in a quick poll whether they liked the movie. Out of 50 adults, all but 17 said they liked the movie, whereas out of 100 teenagers, all but 49 said they liked the movie. Fill in the blanks below to make the most reasonable statement possible. At the movie premiere, (Choose one) whereas % of the (Choose one) moviegoers liked the movie more. That is because only % disliked the movie, moviegoers disliked the movie. X 5

An instructor was interested in how framing impacted her students' feelings about her grades. She randomly assiagned students to either receive positive ("This is an improvement") or negative ("You will still need to do a lot of work on this") feedback on an assignment. She further assigned students to a points lost (-10 points) or points gained (+90 condition) condition. After teach assignment was returned, she asked students to rate the fairness of their grades on a 10-point scale (0 = not fair at all, 10 = extremely fair).                                          Points Lost                          Points Gained                         Mean Positive Feedback               7.8                                            7.9                                   7.85 Negative Feedback              4.3                                            5.5                                   4.9 Mean                                    6.05                                           6.7…

Blank 1 :  contains / does not contain blank 2:  alternative / null  blank 3: sufficient / insufficient  blank 4:  reject / support Blank 5 : insufficient / sufficient  blank 6: support / reject

A parent downloads an app that allows him to monitor the amount of screen time his child is using on the phone. The child claims that she is only using 1 hour per day on the phone on average, but the app, over the course of 47 days, finds that the child used an average of 1.2 hours per day. The parent wants to know if the child is using an average of 1 hour per day for all days of use. a) The 1.2 is a/an: variable population parameter sample statistic observational unit b) The sample size is: 1 47 1.2 c) Each day is a/an: population parameter observational unit variable sample statistic

In a recent study,  50  males used a new weight-loss supplement, and all but  15  of them experienced weight loss after two weeks. In the same study,  100  females used the same supplement, and all but  22  of them experienced weight loss after two weeks. Fill in the blanks below to make the most reasonable statement possible.   The new weight-loss supplement was less effective on ▼(Choose one) in the study. That is because only  %  of them lost weight after two weeks, whereas  %  of the ▼(Choose one) lost weight after two weeks.

In a study of pain relievers, 25 people were given product A, and 16 experienced relief. In the same study, 100 people were given product B, and 53 experienced relief. Fill in the blanks of the statement below to make the statement the most reasonable possible. Product v performed worse in the study because % failed to get relief with this product, whereas only O % failed to get relief with Product ?

Suppose Fred has 2 pairs of pants (blue and black) and 3 shirts (red, blue, and black).  Which of the following represents all of the outfits Fred could make with these options?

Are these true or false and why?

After the premiere of the new comedy Bumblebee, moviegoers were asked in a quick poll whether they liked the movie. Out of 100 adults,  80 said they liked the movie, whereas out of 50 teenagers, 34 said they liked the movie. Fill in the blanks of the statement below to make the statement the most reasonable possible. At the movie premiere, ?adult teenage moviegoers liked the movie less because % disliked the movie, whereas only %of the ?adult teenage moviegoers disliked the movie.