Ten subjects were chosen for an experiment. They were asked to perform a certain physical activity. The number of heartbeats per minute, before and after experiment are recorded as follows: Subject number Before Subject number Before After After 60 67 92 79 72 71 69 76 73 72 71 72 80 8 9 81 80 75 68 Is there sufficient evidence to indicate that the experiment condition increases the number of heartbeats per minute? 68 72 10 76 Use a .05 level of significance. 1234 5
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- 11. Add 6 to each number in the dataset. Then, the 15th percentile is:a. 1b. 6c. 8d. 7Use the following information to answer questions 12-14: Suppose the probability that an adult gets thenews from Facebook is 0.60. A random sample of 14 adults were surveyed to determine X, the numberof adults who get their news from Facebook.12. Which of the following statements is false?a. The set of possible x-values is {1, 2, 3, . . ., 14}b. X ~ B (14, 0.60)c. P(X=5) = 0.0408d. µ = 8.413. Find the probability that at least 6 adults get their news from Facebook.a. 0.8499b. 6/14c. 0.6429d. 0.941714. X is of data of type:a. categorical nominalb. categorical ordinalc. numerical continuousd. numerical discrete15. Suppose that the ages of Brunswick CC students are normally distributed. A random sample of 6Brunswick CC students reported the ages of 20, 35, 18, 45, 27, and 20 years old. Find the errorbound that corresponds to the 90% confidence interval for the true population mean age ofBrunswick CC…2. Ten subjects were chosen for an experiment. They were asked to perform a certain physical activity. The number of heart beats per minute, before and after the experiment, was recorded as follows: Subject No. Before After Subject No. After Before 1 60 92 72 76 67 79 7 71 73 72 72 8 69 81 4 71 80 9 75 80 68 72 10 68 76 Is there sufficient evidence to indicate that the experimental condition increases the number of heart beats per minute? Test at 1% significance level.Participants who agree to use a certain weight loss pill to help alleviate their hunger were randomly surveyed before and after taking the weight loss pill. Their responses are given below using a scale from 1 to 10, where 1 is a small amount of hunger and 10 is very hungry. Does this weight loss pill help alleviate hunger? Before 9 9 7 6 8 7 7 5 8 After 8 9 6 5 8 7 8 4 6 What is the decision for this test? Participants who agree to use a certain weight loss pill to help alleviate their hunger were randomly surveyed before and after taking the weight loss pill. Their responses are given below using a scale from 1 to 10, where 1 is a small amount of hunger and 10 is very hungry. Does this weight loss pill help alleviate hunger? Before 9 9 7 6 8 7 7 5 8 After 8 9 6 5 8 7 8 4 6 What is the decision for this test? Fail to reject the null because the test statistic is not in the critical region and the p-value is less than alpha. Reject the null because the…
- Forty randomly selected students were asked the number of pairs of sneakers they owned. Let X = the number of pairs of sneakers owned. The results are as follows: X Frequency Relative Frequency Cumulative Relative Frequency 1 2 2 4 3 8 4 12 5 12 6 2 Find the sample mean x. (Round your answer to two decimal places.)You want to see if it makes a difference which lane to be in when there is traffic. You randomly observe 372 cars as they pass by on the four lane freeway. The results are displayed in the table below. Use a level of significance of a = 0.10. a. Complete the rest of the table by filling in the expected frequencies: Frequency of Cars in Each Lane Outcome Frequency Expected Frequency Lane 1 89 Lane 2 90 Lane 3 92 Lane 4 101A sociologist wanted to determine whether there was a difference in the amount of time children 5-7 spent watching television each day. The following data was gathered. Check the data for evidence that the number of minutes spent watching television is equally distributed throughout the week. Use a=0.05. 23 Day Sun # of minutes 210 *3 # What is the value of the test statistic? E D O 71.26 с O2.82 O27.48 O72.12 C SAN DIEGO STATE stv ♫ Ⓡ $ 4 R F Mon 125 % 5 Q Search or enter address V T G A 6 Tue 140 MacBook Pro B Y H Wed 130 & 7 U N Fax: 619.594.3081 * 00 Thu 125 8 J ↑ 1 M Fri 200 ( 9 < K Sat 225 O ) 0 < L I' P
- Determine whether the given description corresponds to an observational study or an experiment. In a study of 366 women with a particular disease, the subjects were monitored with an EEG while asleep. Does the given description correspond to an observational study or an experiment?The type of household for the U.S. population and for a random sample of 411 households from a community in Montana are shown below. Type of Household Percent of U.S.Households Observed Numberof Households inthe Community Married with children 26% 92 Married, no children 29% 121 Single parent 9% 31 One person 25% 102 Other (e.g., roommates, siblings) 11% 65 A) Find the value of the chi-square statistic for the sample. (Round the expected frequencies to two decimal places. Round the test statistic to three decimal places.) B)Find or estimate the P-value of the sample test statistic. (Round your answer to three decimal places.)Kindergarten students were participants in a study investigating fine motor skills of 37 children. The children had their fine motor skills measured before the study (a combination of hand use, eye-hand coordination, and manual dexterity) and again after undergoing 7 months of occupational therapy. With the instrument used, high scores indicated stronger fine motor skills. Summary statistics are given below: Difference n Sample Diff Std. Err. Min Max d = Pre - Post 37 -7.8109 2.0715 -36 9 Determine what positive and negative differences mean regarding a student's fine motor skills. Pay attention to the order of subtraction in the output. A positive difference means the Select an answer post-test pre-test score was greater than the Select an answer post-test pre-test , implying fine motor skills were Select an answer weakened strengthened over the 7 months. A negative difference means the Select an answer post-test pre-test score was greater than the Select an answer…
- Listed below are body temperatures from five different subjects measured at 8 AM and again at 12 AM. Find the values of d and sg. In general, what does, represent? Temperature (F) at 8AM 98.1 99.2 97.3 97.9 97.5 Temperature ("F) at 12 AM 98.5 99.6 97.4 97.6 97.8 Let the temperature at 8 AM be the first sample, and the temperature at 12 AM be the second sample. Find the values of d and s à-0.20 (Type an integer or a decimal. Do n decimal. Do not round.)An experiment was conducted in which two fair dice were thrown 100 times. The sum of the dice was then recorded. The following frequency histogram gives the results. Sum of Two Dice 25 20 5 0 - 2 3 5 6 7 8 9 10 11 12 Value of Dice (a) What was the most outcome of the experiment?Blank 1 (b) What was the least frequent? Blank 2 (c) How many times did we observe a 7? Blank 3 (d) Determine the percentage of time a 7 was observed. Blank 4 (e) Describe the shape of the distribution (skewed left, skewed right, bell-shaped) Blank 5 Blank 1 Add your answer Blank 2 Add your answer Blank 3 Add your answer Blank 4 Add your answer tes remaining FrequencyYou want to see if it makes a difference which lane to be in when there is traffic. You randomly observe 296 cars as they pass by on the four lane freeway. The results are displayed in the table below. Use a level of significance of a = 0.10. a. Complete the rest of the table by filling in the expected frequencies: Frequency of Cars in Each Lane Outcome Frequency Expected Frequency Lane 1 73 Lane 2 59 Lane 3 79 Lane 4 85 b. What is the correct statistical test to use? Select an answer < c. What are the null and alternative hypotheses? Ho: The traffic and lanes are independent. The distribution of traffic is not uniform. The distribution of traffic is uniform. The traffic and lanes are dependent. H1: The traffic and lanes are independent. O The distribution of traffic is uniform. The distribution of traffic is not uniform. The traffic and lanes are dependent.