Homework Answers
Sol:
chi sq test statistic:
=11.583
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A doctor keeps track of the number of babies she delivers in each season. She expects...
a) true b) false 42. For a chi-square distributed random variable with 10 degrees of freedom and a level of sigpificanoe computed value of the test statistics is 16.857. This will lead us to reje...
a) true b) false 42. For a chi-square distributed random variable with 10 degrees of freedom and a level of sigpificanoe computed value of the test statistics is 16.857. This will lead us to reject the null hypothesis. a) true b) false 43. A chi-square goodness-of-fit test is always conducted as: a. a lower-tail test b. an upper-tail test d. either a lower tail or upper tail test e. a two-tail test 44. A left-tailed area in the chi-square distribution...
Remember back to Tess Tastypop. She tasted Dr. Pepper 3 times and each time she had...
Remember back to Tess Tastypop. She tasted Dr. Pepper 3 times and each time she had a probability of liking Dr. Pepper, which was 0.75. Each taste was independent, and we said that the count of the number of likes followed a Binomial Distribution. I observed Tess drinking the Dr. Pepper 3 times over 100 trials and recorded the number of likes for each trial. I ended up with the frequencies shown below. Run a chi-square analysis that will test...
according to a census, 7.1% of all babies born are of low birth weight. An obstetrician...
according to a census, 7.1% of all babies born are of low birth
weight. An obstetrician wanted to know whether mothers between the
ages of 35 and 39 yesrs give birth to a higher percentage of low-
birth- weight babies. she randomly selected 240 births for which
the mother was 35 to 39 years old and found 28 low- birth - weight
babies complete parts a-c
(a) If the proportion of low bwh weight babies for mothers in this age...
41. Which of the following Pearson correlation coefficients indicates the greatest association between two groups of...
41. Which of the following Pearson correlation coefficients indicates the greatest association between two groups of vegetables? a. 0.0 b. 0.1 c. 0.2 d. 0.5 e. 0.8 42. Given the following data: 1 4 2 2 3 3 y: 1 4 Find: (Exy)(Ex2)(Ex) a. 9000 b. 70 c. 6000 d. 600 e. 27,000 43. How do a binomial distribution and a multinomial experiment differ? a. by the number of trials b. by the number of categories used c. by the...
Which Test those cases should use? A: one sample z-test B: one-sample t-test C: t-test for the...
Which Test those cases should use? A: one sample z-test B: one-sample t-test C: t-test for the difference between means for two related samples D: t-test for the difference between means for two independent samples with homogeneity of variance E: t-test for the difference between means for two independent samples with heterogeneity of variance F: a one sample z-test for proportions (or a chi-square goodness of fit) G: chi-square goodness of fit only (where a one sample z-test of proportions isn’t appropriate) H: a two-sample z-test...
1. Suppose you were asked to analyze each of the situations described below. (NOTE: Do not answer these problems!) For each, indicate which procedure you would use (pick the appropriate number fr...
1. Suppose you were asked to analyze each of the situations described below. (NOTE: Do not answer these problems!) For each, indicate which procedure you would use (pick the appropriate number from the list), the test statistic (z.2 or ), and the number of degrees of freedom A procedure may be used more than once. 1. difference of proportions test Type zx/t? df 2. difference of means test a. 3. paired means test 4. goodness of fit test 5. homogeneity/independence...
The age distribution of the Canadian population and the age distribution of a random sample of 455 residents in the Indian community of a village are shown below. Age (years) Percent of Canadian Po...
The age distribution of the Canadian population and the age distribution of a random sample of 455 residents in the Indian community of a village are shown below. Age (years) Percent of Canadian Population Observed Number in the Village Under 5 7.2% 48 5 to 14 13.6% 79 15 to 64 67.1% 281 65 and older 12.1% 47 Use a 5% level of significance to test the claim that the age distribution of the general Canadian population fits the age...
look at each test on pic above and answer the question below: Interpret the result in APA stat (1a) Is there a statistically significant difference in academic performance in 2000...
look at each test on pic above and answer the question below:
Interpret the result in APA stat
(1a) Is there a statistically significant difference in
academic performance in 2000 according to the socioeconomic
standing of the school as measured by the percentage of students
that receive free meals? Explain.
one-way anova
(1b) Is there a statistically significant difference in
academic performance in 1999 between year-round and non-year-round
schools? How do you know? Explain?
Independent t test
(1c) Determine if...
(I did this homework in completion but professor was not happy with answers whatsoever, need additional...
(I did this homework in completion but professor was
not happy with answers whatsoever, need additional answers and
especially improvement to 1.b
help!! photos not attaching?
mean by severai steps. inis is a View Feedback homework and will need you to work, in one two View Feedback or various steps. Unfortunately, I cannot read your screen shot of what you did on excel. As I have said in numerous messages announcements etc, I cannot аcсept pictures. You need to write...
a) true b) false 42. For a chi-square distributed random variable with 10 degrees of freedom and a level of sigpificanoe computed value of the test statistics is 16.857. This will lead us to reject the null hypothesis. a) true b) false 43. A chi-square goodness-of-fit test is always conducted as: a. a lower-tail test b. an upper-tail test d. either a lower tail or upper tail test e. a two-tail test 44. A left-tailed area in the chi-square distribution...
according to a census, 7.1% of all babies born are of low birth
weight. An obstetrician wanted to know whether mothers between the
ages of 35 and 39 yesrs give birth to a higher percentage of low-
birth- weight babies. she randomly selected 240 births for which
the mother was 35 to 39 years old and found 28 low- birth - weight
babies complete parts a-c
(a) If the proportion of low bwh weight babies for mothers in this age...
41. Which of the following Pearson correlation coefficients indicates the greatest association between two groups of vegetables? a. 0.0 b. 0.1 c. 0.2 d. 0.5 e. 0.8 42. Given the following data: 1 4 2 2 3 3 y: 1 4 Find: (Exy)(Ex2)(Ex) a. 9000 b. 70 c. 6000 d. 600 e. 27,000 43. How do a binomial distribution and a multinomial experiment differ? a. by the number of trials b. by the number of categories used c. by the...
1. Suppose you were asked to analyze each of the situations described below. (NOTE: Do not answer these problems!) For each, indicate which procedure you would use (pick the appropriate number from the list), the test statistic (z.2 or ), and the number of degrees of freedom A procedure may be used more than once. 1. difference of proportions test Type zx/t? df 2. difference of means test a. 3. paired means test 4. goodness of fit test 5. homogeneity/independence...
look at each test on pic above and answer the question below:
Interpret the result in APA stat
(1a) Is there a statistically significant difference in
academic performance in 2000 according to the socioeconomic
standing of the school as measured by the percentage of students
that receive free meals? Explain.
one-way anova
(1b) Is there a statistically significant difference in
academic performance in 1999 between year-round and non-year-round
schools? How do you know? Explain?
Independent t test
(1c) Determine if...
(I did this homework in completion but professor was
not happy with answers whatsoever, need additional answers and
especially improvement to 1.b
help!! photos not attaching?
mean by severai steps. inis is a View Feedback homework and will need you to work, in one two View Feedback or various steps. Unfortunately, I cannot read your screen shot of what you did on excel. As I have said in numerous messages announcements etc, I cannot аcсept pictures. You need to write...
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