A sample is selected from a population with a mean reading score of µ= 50. A new reading strategies treatment is administered to 16 individuals in a sample (n=16). The reading scores after the reading strategies treatment is found to be M = 55 and SS = 960. Was the reading strategies treatment effective? a. Use a two-tailed test with a = .05. Conduct the four steps for hypothesis testing and label each step: Step1, Step 2, Step 3, and Step 4. b. Calculate Cohen’s d. c. Are the data sufficient to conclude that thier is a significant difference? Write your answer in the form of a sentence.

In this question, you are asked to use the t-test A newspaper article says that on the average, college freshman spend 7.5 hours a week going to parties. One administer does not believe that these figures apply at her college, which has nearly 3,000 freshman, as she believe freshmen spent less time going to parties. She takes a simple random sample of 100 freshman and interviews them. On average, they report 6.6 hours a week going to parties, and the sample SD (or SD+) is 9 hours. Is the difference between the sample average (6.6 hours) and average under the null hypothesis (7.5 hours) real? Hint: Recall that you need to use the t-statistic here.   Group of answer choices The z-test statistic is between -1 and 1 (inclusive), so the difference looks like chance. The z-test statistic is between -1 and 1 (inclusive), so the difference appears to be real. The z-test statistic is smaller than -1 or larger than 1, so the difference looks like chance. The z-test statistic is smaller…

Christopher wants to compare whether those that study before they go to bed or during the day perform better on an exam. What type of test would be appropriate to evaluate the results of his study? one-way ANOVA independent t-test dependent t-test one-sample t-test

Molly works for a meat producer, and she needs to determine whether containers of ground beef have the correct fat content. She obtains a random sample of 120 containers of ground beef and finds that 84 percent have the correct fat content. Molly then conducts a hypothesis test of H0:p=0.80H0:p=0.80 versus Ha:p≠0.80Ha:p≠0.80 and calculates a test statistic of 1.10 with a pp-value of 0.273. Which of the following best represents the meaning of the pp-value?     If the population proportion is 0.84, the probability of observing a sample proportion of 0.80 is 0.273. A If the population proportion is 0.84, the probability of observing a sample proportion of at least 0.04 less than 0.84 is 0.273. B If the population proportion is 0.80, the probability of observing a sample proportion within 0.04 of 0.80 is 0.273. C If the population proportion is 0.80, the probability of observing a sample proportion at least 0.04 greater than 0.80 is 0.273. D If the…

Identify the type I error and the type II error that correspond to the given hypothesis.   The percentage of households with more than 1 pet is equal to 65%.

The data on the number of chocolate chips per bag for 42 bags of Chips Ahoy! cookies were obtained by the students in an introductory statistics class at the United States Air Force Academy in response to the Chips Ahoy! 1,000 Chips Challenge sponsored by Nabisco, the makers of Chips Ahoy! Use the data collected by the students to answer the following questions and to conduct the analyses required in each part. They found ¯xx¯ = 1261.6 and s = 117.6 a. Determine a 95% confidence interval for the mean number of chips per bag for all bags of Chips Ahoy! cookies. ≤μ≤≤μ≤  b. Interpret your result in words.    c. Can you conclude that the average bag of Chips Ahoy! Cookies contain at least 1000 chocolate chips?    yes no   d. Explain why or why not.

An online magazine article reported that US adults spend an average of $50 on birthday gifts for their partners. A local sociologist believes that number is too high for adults in her city of Dover, DE. She surveyed a random sample of 35 residents of Dover, DE and found a sample mean of $43.23 spent on birthday gifts for their partners. A one sample t test produced a p-value of 0.026. Which of the following is a correct interpretation of the p-value? a. The probability is 0.026 that the mean amount of money all residents of Dover spend on birthday gifts for their partner is less than $43.23. b. The probability is 0.026 that the mean amount of money all residents of Dover spend on birthday gifts for their partner is less than $50. c. The probability is 0.026 that the mean amount of money all residents of Dover spend on birthday gifts for their partner is more than $43.23. d. If the mean amount of money all residents of Dover spend on birthday gifts for their partner is $50, the…

find the value:

Suppose IQ scores were obtained for 20 randomly selected sets of siblings. The 20 pairs of measurements yield x= 98.55, y 96.1, r 0.840, P-value = 0.000, and y = 1.09 +0.96x, where x represents the IQ score of the younger child. Find the best predicted value of y given that the younger child has an IQ of 102? Use a significance level of 0.05. Click the icon to view the critical values of the Pearson correlation coefficientr. The best predicted value of y is (Round to two decimal places as needed.)

Find the standardized test statistic, z to test the claim that p, =P2. The sample statistics listed below are from independent samples. n = 50, x, = 35, and n2 = 60, X2 = = 40 %3D O A. 1.328 B. 2.361 O C. 0.374 D. 0.982