earcher to believe that anemia is less prevalent among women in the first country than among women in the second country. A random sample of 1900 men from the first country yielded 441 women with anemia, and an independently chosen, random sample of 1800 women from the second country yielded 1 women with anemia. sed on the study can we conclude, at the 0.01 level of significance, that the proportion P₁ of women with anemia in the first country is less than the oportion P₂ of women with anemia in the second country? rform a one-tailed test. Then complete the parts below. rry your intermediate computations to three or more decimal places and round your answers as specified in the parts below. (If necessary, consult a list of mulas.) (a) State the null hypothesis H. and the alternative hypothesis H₁. HO H₁:0 (b) Determine the type of test statistic to use. (Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) H x a ✔ S 00 p

QUESTION 1 The Centers of Disease Control and Prevention has launched studies of drug-resistant gonorrhea, Of 110 cases tested in Alabama, 14 were found to be drug- resistant. Of 95 cases in Texas, 7 were found to be drug-resistant. Does the data indicate that the proportion of drug-resistant cases in Alabama is higher thar proportion of cases in Texas at a=,0057 For the hypothesis stated above, what is the test statistic (in terms of "Alabama" minus "Texas "? O a. 1.2618 O b. 1.3092 OC. 1.2891 Od. None of the answers is correct Oe. 1.3303 QUESTION 2 No Siblings - With Siblings 10 Sample Size Sample Mean Sample Standard Deviation 67.0000 141.6608 Confidence Interval (in terms of No Siblings - With Siblings) Confidence Coefficient 0,98 Lower Limit -59.3922 Upper Limit 193.3922 Click Save and Submit to save and submit. Click Save All Answers to save all answers. MacBook Air 吕口 F3 000 F2 O00 FA @ 2 3 4 5 7 Q W E R T Y A S D F G H * CO

The partially completed ANOVA table given in this problem is taken from the article “Perception of Spatial Incongruity” (Journal of Nervous and Mental Disease), in which the abilities of three different groups to identify a perceptual incongruity were assessed and compared. All individuals in the experiment had been hospitalized to undergo psychiatric treatment. There were 21 individuals in the depressive group, 32 individuals in the functional “other” group, and 21 individuals in the brain-damaged group. (round all results to two decimal places)  Fill the ANOVA table below: (round all except degrees of freedom to 2 decimal places) Source of Variation Degrees of Freedom Sum of Squares Mean Square Treatments     76.09 Error       Total   1123.14 What is the F test statistic here? (round to 2 decimal places) _________

Z=, P-Value=

This is a long question and both pictures are part of the same question though.

No idea how to solve this, all help is appreciated, thanks!

Volunteers who had developed a cold within the previous 24 hours were randomized to take either zinc or placebo lozenges every 2 to 3 hours until their cold symptoms were gone. Twenty-five participants took zinc lozenges, and 23 participants took placebo lozenges. For the placebo group, the mean overall duration of symptoms was x, 7.7 days, and the standard deviation was 1.4 days. The mean overall duration of symptoms for the zinc lozenge group was x, 4.2 days, and the standard deviation of overall duration of symptoms was 1.4 days. n USE SALT (a) Calculate x, - x, difference in sample means. days 2x - 'x Compute the unpooled s.e.(x, – x,) standard error of the difference in means. (Round your answer to four decimal places.) s.e.(x1 - X2) = days (b) Compute a 95% confidence interval for the difference in mean days of overall symptoms for the placebo and zinc lozenge treatments. Use the unpooled standard error and use the smaller of n1 1 and n2 1 as a conservative estimate of degrees of…

Is narcissism a more common personality trait today than it was a few decades ago?  It is known that the mean population score on the Narcissistic Personality Inventory (NPI) for students attending University of South Alabama around 20 years ago was μ= 15 (Twenge, 2010).  Interested in the narcissism levels of students in the year 2020, a researcher administers the NPI to a random sample of 25 University of Alabama sophomores this Spring term. The mean NPI score from the researcher’s sample of sophomores is M = 16.5, with s = 3.4. 1. Find the obtained (i.e., computed) test statistic for a sample (n=25) with a mean of 16.5   2. Make a statistical decision about the null. Will you reject or fail to reject the null based on your sample data?    3. Justify your decision about the null.

Imagine you are a statistical consultant and your client, a weightlifting supplement company, is looking to see if their product is effective in increasing muscle mass gained over a training cycle. You randomly sampled 20 female weightlifters and assigned them to take the supplement and 20 to take a placebo. You have both groups run the same controlled training program over 12 weeks and calculated their whole body lean mass difference in pounds from the beginning to the end of the program. Can you infer that the supplement group gained more muscle mass on average than the placebo group? Use a = 0.05 for any hypothesis test. પ્રમ 1) State the research question in one sentence and use the question to determine the parameter we are using to conduct statistical inference. Describe this parameter in one sentence using symbols and a description. manu Aren

A hospital reported that the normal death rate for patients with extensive burns (more than 40% of skin area) has been significantly reduced by the use of new fluid plasma compresses. Before the new treatment, the mortality rate for extensive burn patients was about 60%. Using the new compresses, the hospital found that only 42 of 89 patients with extensive burns died. Use a 1% level of significance to test the claim that the mortality rate has dropped.   What are we testing in this problem? single proportionsingle mean       (a) What is the level of significance?State the null and alternate hypotheses. H0: ? = 0.6; H1: ? < 0.6H0: p = 0.6; H1: p ≠ 0.6    H0: p = 0.6; H1: p < 0.6H0: ? = 0.6; H1: ? > 0.6H0: p = 0.6; H1: p > 0.6H0: ? = 0.6; H1: ? ≠ 0.6 (b) What sampling distribution will you use? What assumptions are you making? The Student's t, since np < 5 and nq < 5.The standard normal, since np < 5 and nq < 5.    The Student's t, since np > 5 and nq >…